RE: OT: OutOfMemory
I would think he should use some kind of a buffered input stream and only
read in part of the data at once.
That way he would never have the entire string in the buffer at once.
Then open an output stream at the same time and write out the modified
contents to it.
This way I wouldn't think the buffer would have to be any more than three
times the length of the longest string you're searching for.
If you were searching for b*e*a*r your buffer would only need to be 3 times
the length of bear plus the max length of a * (there has to be some limit if
you look at actual data).
Shawn
-Original Message-
From: Chen Jerry [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 29, 2005 12:12 AM
To: Struts Users Mailing List
Subject: Re: OT: OutOfMemory
Rechard,
I suppose Eric wanna output HTML.
I myself prefer css to font tags. Introducing an XSLT engine is a nice
idea, however, it seems not the choice of Eric.
I suppose the current problem results from default configuration of
JVM or large numbers of substring with a big string.
Regards,
Jerry
2005/11/29, Richard Yee <[EMAIL PROTECTED]>:
> Jerry,
> Are you trying to output HTML? If so, you should consider:
> 1) using CSS instead of the font tags
> 2) use an XSLT transform or transform the text as you output it rather
> than doing it in memory.
>
> -Richard
>
>
> Jason Lea wrote:
> > What is textFormat?
> > It isn't a StringBuilder is it?
> >
> > textFormat.append(subText);
> >
> >
> > Eric Plante wrote:
> >> for (Integer posLetter: positions){
> >> String subText = fullText.substring(start, posLetter);
> >> textFormat.append(subText);
> >> subText = null; //not required
> >> start = posLetter + 1;
> >> }
> >>
> >> with fullText = 5M and textFormat that's even bigger it crashes.
> >>
> >> An friend tried with a 15M file using Lingo language and it worked
> >> without
> >> problems and I bet .NET would have no problem either but I'll know
> >> tomorrow.
> >>
> >> Sorry to hear that.
> >>
> >> Would you please show some source code relative to the problem?
> >>
> >> Well, 5000 loops of substring with a big string is terrible.
> >>
> >> 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> >>
> >>> It wasn't there but I added it and whatever I used -Xmx or -XX, it
> >>> didn't
> >>> work. I wrote 100m for the -XX...
> >>>
> >>> I also checked again where I could optimized and where I could find
> >>> memory
> >>> leakage. Reducing the number of string meant using StringBuilder's
> >>> insertthe slowness of that command makes it not an option. I
> >>> couldn't
> >>> find any memory leakage.
> >>>
> >>> Where the program systematicaly crash is a loop where I do a
> >>> substring of
> >>> the big string everytime(about 5000 loops).I then fill a StringBuilder
> >>>
> >> which
> >>
> >>> will eventualy be bigger than the main string. That's the fastest way
I
> >>>
> >> can
> >>
> >>> do what need to be done and it needs to be fast.
> >>>
> >>> I'm starting to loose faith in Java...I'll ask a friend that
> >>> isa.NETspecialist to see if.NET has that problem too...a problem Java
> >>> shouldn't have...
> >>>
> >>> ---
> >>>
> >>> I found in my catalina.bat:
> >>> set JAVA_OPTS=
> >>> Instead of that, use:
> >>> set JAVA_OPTS=-XX:MaxPermSize=10m
> >>>
> >>> -Xmx512m seems only increase max size of heap rather than perm
> >>> division.
> >>>
> >>> 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> >>>
> >>>> I found the required catalina files and I see 4 lines with the
> >>>> JAVA_OPTS
> >>>> variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by
-Xmx512m
> >>>>
> >> in
> >>
> >>>> the catalina.bat file but I still get the error message, what am I
> >>>>
> >> suppose
> >>
> >>>> to do in that file?
> >>>>
> >>>> - Original Message -
> >>>> From: "netsql" <[EMAIL PROTECTED]>
> >>>> To:
> >>>> Sent: Sunday, November 27, 2005 10:09 PM
> &
RE: OT: OutOfMemory
Eric, Is this what you are looking for? It is from the Exadel Forum site http://forum.exadel.com and the exadel HELP pages: http://www.exadel.com/exadelstudio/help/servletToolbar.html The toolbar under "Running" has a tomcat section where you should be able to add "JVM" arguments like the "-XX:MaxPermSize=10m" one we are discussing. See the bottom screen capture/image in that page for a clear illustration. Regards, David -Original Message- From: Eric Plante [mailto:[EMAIL PROTECTED] Sent: Monday, November 28, 2005 10:20 PM To: Struts Users Mailing List Subject: Re: OT: OutOfMemory I'm using the internal Eclipse/Exadel Studio tomcat 5.5 but I think it uses the same installed tomcat server since I should havelinked Eclipse to it but it uses it own ser of xml files. I added 1024M to maximum memory but it changed nothing. I couldn't find that 1024 in any xml files in the tomcat directory... - >From Taskbar, right click Tomcat5 Service Icon, click "Configure". On configure window, choose "java" tab, enter Initial Memory Pool Maximum Memory Pool. Regards On 11/29/05, Chen Jerry <[EMAIL PROTECTED]> wrote: > > I found in my catalina.bat: > set JAVA_OPTS= > Instead of that, use: > set JAVA_OPTS=-XX:MaxPermSize=10m > > -Xmx512m seems only increase max size of heap rather than perm division. > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > I found the required catalina files and I see 4 lines with the JAVA_OPTS > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > in > > the catalina.bat file but I still get the error message, what am I > suppose > > to do in that file? > > > > - Original Message - > > From: "netsql" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, November 27, 2005 10:09 PM > > Subject: Re: OT: OutOfMemory > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > Eric Plante wrote: > > > > I'm on windows XP and the only catalina files that might serve for > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Rechard,
I suppose Eric wanna output HTML.
I myself prefer css to font tags. Introducing an XSLT engine is a nice
idea, however, it seems not the choice of Eric.
I suppose the current problem results from default configuration of
JVM or large numbers of substring with a big string.
Regards,
Jerry
2005/11/29, Richard Yee <[EMAIL PROTECTED]>:
> Jerry,
> Are you trying to output HTML? If so, you should consider:
> 1) using CSS instead of the font tags
> 2) use an XSLT transform or transform the text as you output it rather
> than doing it in memory.
>
> -Richard
>
>
> Jason Lea wrote:
> > What is textFormat?
> > It isn't a StringBuilder is it?
> >
> > textFormat.append(subText);
> >
> >
> > Eric Plante wrote:
> >> for (Integer posLetter: positions){
> >> String subText = fullText.substring(start, posLetter);
> >> textFormat.append(subText);
> >> subText = null; //not required
> >> start = posLetter + 1;
> >> }
> >>
> >> with fullText = 5M and textFormat that's even bigger it crashes.
> >>
> >> An friend tried with a 15M file using Lingo language and it worked
> >> without
> >> problems and I bet .NET would have no problem either but I'll know
> >> tomorrow.
> >>
> >> Sorry to hear that.
> >>
> >> Would you please show some source code relative to the problem?
> >>
> >> Well, 5000 loops of substring with a big string is terrible.
> >>
> >> 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> >>
> >>> It wasn't there but I added it and whatever I used -Xmx or -XX, it
> >>> didn't
> >>> work. I wrote 100m for the -XX...
> >>>
> >>> I also checked again where I could optimized and where I could find
> >>> memory
> >>> leakage. Reducing the number of string meant using StringBuilder's
> >>> insertthe slowness of that command makes it not an option. I
> >>> couldn't
> >>> find any memory leakage.
> >>>
> >>> Where the program systematicaly crash is a loop where I do a
> >>> substring of
> >>> the big string everytime(about 5000 loops).I then fill a StringBuilder
> >>>
> >> which
> >>
> >>> will eventualy be bigger than the main string. That's the fastest way I
> >>>
> >> can
> >>
> >>> do what need to be done and it needs to be fast.
> >>>
> >>> I'm starting to loose faith in Java...I'll ask a friend that
> >>> isa.NETspecialist to see if.NET has that problem too...a problem Java
> >>> shouldn't have...
> >>>
> >>> ---
> >>>
> >>> I found in my catalina.bat:
> >>> set JAVA_OPTS=
> >>> Instead of that, use:
> >>> set JAVA_OPTS=-XX:MaxPermSize=10m
> >>>
> >>> -Xmx512m seems only increase max size of heap rather than perm
> >>> division.
> >>>
> >>> 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> >>>
> >>>> I found the required catalina files and I see 4 lines with the
> >>>> JAVA_OPTS
> >>>> variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m
> >>>>
> >> in
> >>
> >>>> the catalina.bat file but I still get the error message, what am I
> >>>>
> >> suppose
> >>
> >>>> to do in that file?
> >>>>
> >>>> - Original Message -
> >>>> From: "netsql" <[EMAIL PROTECTED]>
> >>>> To:
> >>>> Sent: Sunday, November 27, 2005 10:09 PM
> >>>> Subject: Re: OT: OutOfMemory
> >>>>
> >>>>
> >>>>
> >>>>> http://tomcat.apache.org/faq/memory.html#adjust
> >>>>>
> >>>>>
> >>>>> Eric Plante wrote:
> >>>>>
> >>>>>> I'm on windows XP and the only catalina files that might serve for
> >>>>>> configuration are Catalina.properties and catalina.policy
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>> -
> >>>>> To unsubscribe, e-mail: [EMAIL PROTECTED]
> >>>>&g
Re: OT: OutOfMemory
Jerry,
Are you trying to output HTML? If so, you should consider:
1) using CSS instead of the font tags
2) use an XSLT transform or transform the text as you output it rather
than doing it in memory.
-Richard
Jason Lea wrote:
What is textFormat?
It isn't a StringBuilder is it?
textFormat.append(subText);
Eric Plante wrote:
for (Integer posLetter: positions){
String subText = fullText.substring(start, posLetter);
textFormat.append(subText);
subText = null; //not required
start = posLetter + 1;
}
with fullText = 5M and textFormat that's even bigger it crashes.
An friend tried with a 15M file using Lingo language and it worked
without
problems and I bet .NET would have no problem either but I'll know
tomorrow.
Sorry to hear that.
Would you please show some source code relative to the problem?
Well, 5000 loops of substring with a big string is terrible.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
It wasn't there but I added it and whatever I used -Xmx or -XX, it
didn't
work. I wrote 100m for the -XX...
I also checked again where I could optimized and where I could find
memory
leakage. Reducing the number of string meant using StringBuilder's
insertthe slowness of that command makes it not an option. I
couldn't
find any memory leakage.
Where the program systematicaly crash is a loop where I do a
substring of
the big string everytime(about 5000 loops).I then fill a StringBuilder
which
will eventualy be bigger than the main string. That's the fastest way I
can
do what need to be done and it needs to be fast.
I'm starting to loose faith in Java...I'll ask a friend that
isa.NETspecialist to see if.NET has that problem too...a problem Java
shouldn't have...
---
I found in my catalina.bat:
set JAVA_OPTS=
Instead of that, use:
set JAVA_OPTS=-XX:MaxPermSize=10m
-Xmx512m seems only increase max size of heap rather than perm
division.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
I found the required catalina files and I see 4 lines with the
JAVA_OPTS
variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m
in
the catalina.bat file but I still get the error message, what am I
suppose
to do in that file?
- Original Message -
From: "netsql" <[EMAIL PROTECTED]>
To:
Sent: Sunday, November 27, 2005 10:09 PM
Subject: Re: OT: OutOfMemory
http://tomcat.apache.org/faq/memory.html#adjust
Eric Plante wrote:
I'm on windows XP and the only catalina files that might serve for
configuration are Catalina.properties and catalina.policy
-
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Re: OT: OutOfMemory
What is textFormat?
It isn't a StringBuilder is it?
textFormat.append(subText);
Eric Plante wrote:
for (Integer posLetter: positions){
String subText = fullText.substring(start, posLetter);
textFormat.append(subText);
subText = null; //not required
start = posLetter + 1;
}
with fullText = 5M and textFormat that's even bigger it crashes.
An friend tried with a 15M file using Lingo language and it worked without
problems and I bet .NET would have no problem either but I'll know tomorrow.
Sorry to hear that.
Would you please show some source code relative to the problem?
Well, 5000 loops of substring with a big string is terrible.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't
work. I wrote 100m for the -XX...
I also checked again where I could optimized and where I could find memory
leakage. Reducing the number of string meant using StringBuilder's
insertthe slowness of that command makes it not an option. I couldn't
find any memory leakage.
Where the program systematicaly crash is a loop where I do a substring of
the big string everytime(about 5000 loops).I then fill a StringBuilder
which
will eventualy be bigger than the main string. That's the fastest way I
can
do what need to be done and it needs to be fast.
I'm starting to loose faith in Java...I'll ask a friend that
isa.NETspecialist to see if.NET has that problem too...a problem Java
shouldn't have...
---
I found in my catalina.bat:
set JAVA_OPTS=
Instead of that, use:
set JAVA_OPTS=-XX:MaxPermSize=10m
-Xmx512m seems only increase max size of heap rather than perm division.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
I found the required catalina files and I see 4 lines with the JAVA_OPTS
variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m
in
the catalina.bat file but I still get the error message, what am I
suppose
to do in that file?
- Original Message -
From: "netsql" <[EMAIL PROTECTED]>
To:
Sent: Sunday, November 27, 2005 10:09 PM
Subject: Re: OT: OutOfMemory
http://tomcat.apache.org/faq/memory.html#adjust
Eric Plante wrote:
I'm on windows XP and the only catalina files that might serve for
configuration are Catalina.properties and catalina.policy
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--
Jason Lea
Re: OT: OutOfMemory
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> for (Integer posLetter: positions){
Well, would you please post code relative to the variable of postions?
> String subText = fullText.substring(start, posLetter);
> textFormat.append(subText);
> subText = null; //not required
> start = posLetter + 1;
> }
>
> with fullText = 5M and textFormat that's even bigger it crashes.
>
> An friend tried with a 15M file using Lingo language and it worked without
> problems and I bet .NET would have no problem either but I'll know tomorrow.
>
> Sorry to hear that.
>
> Would you please show some source code relative to the problem?
>
> Well, 5000 loops of substring with a big string is terrible.
>
> 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> > It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't
> > work. I wrote 100m for the -XX...
> >
> > I also checked again where I could optimized and where I could find memory
> > leakage. Reducing the number of string meant using StringBuilder's
> > insertthe slowness of that command makes it not an option. I couldn't
> > find any memory leakage.
> >
> > Where the program systematicaly crash is a loop where I do a substring of
> > the big string everytime(about 5000 loops).I then fill a StringBuilder
> which
> > will eventualy be bigger than the main string. That's the fastest way I
> can
> > do what need to be done and it needs to be fast.
> >
> > I'm starting to loose faith in Java...I'll ask a friend that
> > isa.NETspecialist to see if.NET has that problem too...a problem Java
> > shouldn't have...
> >
> > ---
> >
> > I found in my catalina.bat:
> > set JAVA_OPTS=
> > Instead of that, use:
> > set JAVA_OPTS=-XX:MaxPermSize=10m
> >
> > -Xmx512m seems only increase max size of heap rather than perm division.
> >
> > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> > > I found the required catalina files and I see 4 lines with the JAVA_OPTS
> > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m
> in
> > > the catalina.bat file but I still get the error message, what am I
> suppose
> > > to do in that file?
> > >
> > > - Original Message -
> > > From: "netsql" <[EMAIL PROTECTED]>
> > > To:
> > > Sent: Sunday, November 27, 2005 10:09 PM
> > > Subject: Re: OT: OutOfMemory
> > >
> > >
> > > >
> > > > http://tomcat.apache.org/faq/memory.html#adjust
> > > >
> > > >
> > > > Eric Plante wrote:
> > > > > I'm on windows XP and the only catalina files that might serve for
> > > > > configuration are Catalina.properties and catalina.policy
> > > > >
> > > > >
> > > >
> > > >
> > > > -
> > > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > > For additional commands, e-mail: [EMAIL PROTECTED]
> > > >
> > >
> > >
> > > -
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
> -
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>
>
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Re: OT: OutOfMemory
if it was only that, it wouldn't be a problem but it's create, c*r*e*a*t*e,
c**r**e**a**t**e, etc
* represents any letters and it stops when the interval between letters is
reached.
--
Well, to replace each 'create' with 'create',
you can leverage:
String origin = ...
String result = origin.replaceAll("create","create");
I am not sure whether this operation should result in the same problem.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> The only difference between StringBuilder and StringBuffer is that
> StringBuffer is synchronized...from what I read at least and yes I
> considered every other methods of String but I don't see any other ways to
> quickly grab substrings do you have suggestions?
>
>
>
> Instead of using StringBuilder, did you consider using StringBuffer as an
> alternative? Have you check all the available method within String class
> itself?
>
> On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
> >
> > Because I need to insert a tag in front of every letters of
> > every
> > found given word and a closing. The word tested is 'create'(6
> > letters) and it appears something like 830 times.
> >
> > After using a RegEx, I got the positions of those letters so I need
> > substrings of the main string to fill a StringBuilder with the parts not
> > containing the letters of the words.
> >
> > This loop is not there just to be fancy.
> >
> > ---
> > Well, if I wrote a recursive call which never returns, I could bring
down
> > any system. Can you tell us why you need loop 5000 times? Instead of
using
> > StringBuilder, did you consider using StringBuffer as an alternative?
Have
> > you check all the available method within String class itself?
> >
> > This is the checklist I can think of for now, hope it helps.
> >
> > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
> > >
> > > It wasn't there but I added it and whatever I used -Xmx or -XX, it
> > didn't
> > > work. I wrote 100m for the -XX...
> > >
> > > I also checked again where I could optimized and where I could find
> > memory
> > > leakage. Reducing the number of string meant using StringBuilder's
> > > insertthe slowness of that command makes it not an option. I
> > couldn't
> > > find any memory leakage.
> > >
> > > Where the program systematicaly crash is a loop where I do a substring
> > of
> > > the big string everytime(about 5000 loops).I then fill a StringBuilder
> > > which
> > > will eventualy be bigger than the main string. That's the fastest way
I
> > > can
> > > do what need to be done and it needs to be fast.
> > >
> > > I'm starting to loose faith in Java...I'll ask a friend that
> > > isa.NETspecialist to see if.NET has that problem too...a problem Java
> > > shouldn't have...
> > >
> > > ---
> > >
> > > I found in my catalina.bat:
> > > set JAVA_OPTS=
> > > Instead of that, use:
> > > set JAVA_OPTS=-XX:MaxPermSize=10m
> > >
> > > -Xmx512m seems only increase max size of heap rather than perm
division.
> > >
> > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> > > > I found the required catalina files and I see 4 lines with the
> > JAVA_OPTS
> > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS%
by -Xmx512m
> > > in
> > > > the catalina.bat file but I still get the error message, what am I
> > > suppose
> > > > to do in that file?
> > > >
> > > > - Original Message -
> > > > From: "netsql" <[EMAIL PROTECTED]>
> > > > To:
> > > > Sent: Sunday, November 27, 2005 10:09 PM
> > > > Subject: Re: OT: OutOfMemory
> > > >
> > > >
> > > > >
> > > > > http://tomcat.apache.org/faq/memory.html#adjust
> > > > >
> > > > >
> > > > > Eric Plante wrote:
> > > > > > I'm on windows XP and the only catalina files that might serve
for
> > > > > > configuration are Catalina.properties and catalina.policy
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > ---
Re: OT: OutOfMemory
I guess I could try grabbing whole groups instead of their individual letters then I'll have to modify each to add the tags and than do a replacement for each...sounds like a slow process but I have nothing to lose by trying that. Thanks -- have you tried, http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html#replaceAll(java.lang.String,%20java.lang.String) On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > The only difference between StringBuilder and StringBuffer is that > StringBuffer is synchronized...from what I read at least and yes I > considered every other methods of String but I don't see any other ways to > quickly grab substrings do you have suggestions? > > > > Instead of using StringBuilder, did you consider using StringBuffer as an > alternative? Have you check all the available method within String class > itself? > > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > > > Because I need to insert a tag in front of every letters of > > every > > found given word and a closing. The word tested is 'create'(6 > > letters) and it appears something like 830 times. > > > > After using a RegEx, I got the positions of those letters so I need > > substrings of the main string to fill a StringBuilder with the parts not > > containing the letters of the words. > > > > This loop is not there just to be fancy. > > > > --- > > Well, if I wrote a recursive call which never returns, I could bring > down > > any system. Can you tell us why you need loop 5000 times? Instead of > using > > StringBuilder, did you consider using StringBuffer as an alternative? > Have > > you check all the available method within String class itself? > > > > This is the checklist I can think of for now, hope it helps. > > > > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > > > > > It wasn't there but I added it and whatever I used -Xmx or -XX, it > > didn't > > > work. I wrote 100m for the -XX... > > > > > > I also checked again where I could optimized and where I could find > > memory > > > leakage. Reducing the number of string meant using StringBuilder's > > > insertthe slowness of that command makes it not an option. I > > couldn't > > > find any memory leakage. > > > > > > Where the program systematicaly crash is a loop where I do a substring > > of > > > the big string everytime(about 5000 loops).I then fill a StringBuilder > > > which > > > will eventualy be bigger than the main string. That's the fastest way > I > > > can > > > do what need to be done and it needs to be fast. > > > > > > I'm starting to loose faith in Java...I'll ask a friend that > > > isa.NETspecialist to see if.NET has that problem too...a problem Java > > > shouldn't have... > > > > > > --- > > > > > > I found in my catalina.bat: > > > set JAVA_OPTS= > > > Instead of that, use: > > > set JAVA_OPTS=-XX:MaxPermSize=10m > > > > > > -Xmx512m seems only increase max size of heap rather than perm > division. > > > > > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > > > I found the required catalina files and I see 4 lines with the > > JAVA_OPTS > > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by > -Xmx512m > > > in > > > > the catalina.bat file but I still get the error message, what am I > > > suppose > > > > to do in that file? > > > > > > > > - Original Message - > > > > From: "netsql" <[EMAIL PROTECTED]> > > > > To: > > > > Sent: Sunday, November 27, 2005 10:09 PM > > > > Subject: Re: OT: OutOfMemory > > > > > > > > > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > > > > > > > Eric Plante wrote: > > > > > > I'm on windows XP and the only catalina files that might serve > for > > > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ---
Re: OT: OutOfMemory
Well, to replace each 'create' with 'create',
you can leverage:
String origin = ...
String result = origin.replaceAll("create","create");
I am not sure whether this operation should result in the same problem.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> The only difference between StringBuilder and StringBuffer is that
> StringBuffer is synchronized...from what I read at least and yes I
> considered every other methods of String but I don't see any other ways to
> quickly grab substrings do you have suggestions?
>
>
>
> Instead of using StringBuilder, did you consider using StringBuffer as an
> alternative? Have you check all the available method within String class
> itself?
>
> On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
> >
> > Because I need to insert a tag in front of every letters of
> > every
> > found given word and a closing. The word tested is 'create'(6
> > letters) and it appears something like 830 times.
> >
> > After using a RegEx, I got the positions of those letters so I need
> > substrings of the main string to fill a StringBuilder with the parts not
> > containing the letters of the words.
> >
> > This loop is not there just to be fancy.
> >
> > ---
> > Well, if I wrote a recursive call which never returns, I could bring down
> > any system. Can you tell us why you need loop 5000 times? Instead of using
> > StringBuilder, did you consider using StringBuffer as an alternative? Have
> > you check all the available method within String class itself?
> >
> > This is the checklist I can think of for now, hope it helps.
> >
> > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
> > >
> > > It wasn't there but I added it and whatever I used -Xmx or -XX, it
> > didn't
> > > work. I wrote 100m for the -XX...
> > >
> > > I also checked again where I could optimized and where I could find
> > memory
> > > leakage. Reducing the number of string meant using StringBuilder's
> > > insertthe slowness of that command makes it not an option. I
> > couldn't
> > > find any memory leakage.
> > >
> > > Where the program systematicaly crash is a loop where I do a substring
> > of
> > > the big string everytime(about 5000 loops).I then fill a StringBuilder
> > > which
> > > will eventualy be bigger than the main string. That's the fastest way I
> > > can
> > > do what need to be done and it needs to be fast.
> > >
> > > I'm starting to loose faith in Java...I'll ask a friend that
> > > isa.NETspecialist to see if.NET has that problem too...a problem Java
> > > shouldn't have...
> > >
> > > ---
> > >
> > > I found in my catalina.bat:
> > > set JAVA_OPTS=
> > > Instead of that, use:
> > > set JAVA_OPTS=-XX:MaxPermSize=10m
> > >
> > > -Xmx512m seems only increase max size of heap rather than perm division.
> > >
> > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> > > > I found the required catalina files and I see 4 lines with the
> > JAVA_OPTS
> > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m
> > > in
> > > > the catalina.bat file but I still get the error message, what am I
> > > suppose
> > > > to do in that file?
> > > >
> > > > - Original Message -
> > > > From: "netsql" <[EMAIL PROTECTED]>
> > > > To:
> > > > Sent: Sunday, November 27, 2005 10:09 PM
> > > > Subject: Re: OT: OutOfMemory
> > > >
> > > >
> > > > >
> > > > > http://tomcat.apache.org/faq/memory.html#adjust
> > > > >
> > > > >
> > > > > Eric Plante wrote:
> > > > > > I'm on windows XP and the only catalina files that might serve for
> > > > > > configuration are Catalina.properties and catalina.policy
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > -
> > > > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > > > For additional commands, e-mail: [EMAIL PROTECTED]
> > > > >
> > > >
> &g
Re: OT: OutOfMemory
I've considered it but the letters of the word are not necessarily adjacent
to one another, there can be letters in between and those letters aren't
known so replaceAll doesn't work..or at least it didn't when I tried for
something else.
replacing abc by def is no problem but is it supposed to work to replace
a.{2}b.{2}c by d.{2}b.{2}c? I tried something like that before and it didn't
work.
--
have you tried,
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html#replaceAll(java.lang.String,%20java.lang.String)
On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
>
> The only difference between StringBuilder and StringBuffer is that
> StringBuffer is synchronized...from what I read at least and yes I
> considered every other methods of String but I don't see any other ways to
> quickly grab substrings do you have suggestions?
>
>
>
> Instead of using StringBuilder, did you consider using StringBuffer as an
> alternative? Have you check all the available method within String class
> itself?
>
> On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
> >
> > Because I need to insert a tag in front of every letters of
> > every
> > found given word and a closing. The word tested is 'create'(6
> > letters) and it appears something like 830 times.
> >
> > After using a RegEx, I got the positions of those letters so I need
> > substrings of the main string to fill a StringBuilder with the parts not
> > containing the letters of the words.
> >
> > This loop is not there just to be fancy.
> >
> > ---
> > Well, if I wrote a recursive call which never returns, I could bring
> down
> > any system. Can you tell us why you need loop 5000 times? Instead of
> using
> > StringBuilder, did you consider using StringBuffer as an alternative?
> Have
> > you check all the available method within String class itself?
> >
> > This is the checklist I can think of for now, hope it helps.
> >
> > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote:
> > >
> > > It wasn't there but I added it and whatever I used -Xmx or -XX, it
> > didn't
> > > work. I wrote 100m for the -XX...
> > >
> > > I also checked again where I could optimized and where I could find
> > memory
> > > leakage. Reducing the number of string meant using StringBuilder's
> > > insertthe slowness of that command makes it not an option. I
> > couldn't
> > > find any memory leakage.
> > >
> > > Where the program systematicaly crash is a loop where I do a substring
> > of
> > > the big string everytime(about 5000 loops).I then fill a StringBuilder
> > > which
> > > will eventualy be bigger than the main string. That's the fastest way
> I
> > > can
> > > do what need to be done and it needs to be fast.
> > >
> > > I'm starting to loose faith in Java...I'll ask a friend that
> > > isa.NETspecialist to see if.NET has that problem too...a problem Java
> > > shouldn't have...
> > >
> > > ---
> > >
> > > I found in my catalina.bat:
> > > set JAVA_OPTS=
> > > Instead of that, use:
> > > set JAVA_OPTS=-XX:MaxPermSize=10m
> > >
> > > -Xmx512m seems only increase max size of heap rather than perm
> division.
> > >
> > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> > > > I found the required catalina files and I see 4 lines with the
> > JAVA_OPTS
> > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by
> -Xmx512m
> > > in
> > > > the catalina.bat file but I still get the error message, what am I
> > > suppose
> > > > to do in that file?
> > > >
> > > > - Original Message -
> > > > From: "netsql" <[EMAIL PROTECTED]>
> > > > To:
> > > > Sent: Sunday, November 27, 2005 10:09 PM
> > > > Subject: Re: OT: OutOfMemory
> > > >
> > > >
> > > > >
> > > > > http://tomcat.apache.org/faq/memory.html#adjust
> > > > >
> > > > >
> > > > > Eric Plante wrote:
> > > > > > I'm on windows XP and the only catalina files that might serve
> for
> > > > > > configuration are Catalina.properties and catalina.policy
> > > > > >
&
Re: OT: OutOfMemory
have you tried, http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html#replaceAll(java.lang.String,%20java.lang.String) On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > The only difference between StringBuilder and StringBuffer is that > StringBuffer is synchronized...from what I read at least and yes I > considered every other methods of String but I don't see any other ways to > quickly grab substrings do you have suggestions? > > > > Instead of using StringBuilder, did you consider using StringBuffer as an > alternative? Have you check all the available method within String class > itself? > > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > > > Because I need to insert a tag in front of every letters of > > every > > found given word and a closing. The word tested is 'create'(6 > > letters) and it appears something like 830 times. > > > > After using a RegEx, I got the positions of those letters so I need > > substrings of the main string to fill a StringBuilder with the parts not > > containing the letters of the words. > > > > This loop is not there just to be fancy. > > > > --- > > Well, if I wrote a recursive call which never returns, I could bring > down > > any system. Can you tell us why you need loop 5000 times? Instead of > using > > StringBuilder, did you consider using StringBuffer as an alternative? > Have > > you check all the available method within String class itself? > > > > This is the checklist I can think of for now, hope it helps. > > > > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > > > > > It wasn't there but I added it and whatever I used -Xmx or -XX, it > > didn't > > > work. I wrote 100m for the -XX... > > > > > > I also checked again where I could optimized and where I could find > > memory > > > leakage. Reducing the number of string meant using StringBuilder's > > > insertthe slowness of that command makes it not an option. I > > couldn't > > > find any memory leakage. > > > > > > Where the program systematicaly crash is a loop where I do a substring > > of > > > the big string everytime(about 5000 loops).I then fill a StringBuilder > > > which > > > will eventualy be bigger than the main string. That's the fastest way > I > > > can > > > do what need to be done and it needs to be fast. > > > > > > I'm starting to loose faith in Java...I'll ask a friend that > > > isa.NETspecialist to see if.NET has that problem too...a problem Java > > > shouldn't have... > > > > > > --- > > > > > > I found in my catalina.bat: > > > set JAVA_OPTS= > > > Instead of that, use: > > > set JAVA_OPTS=-XX:MaxPermSize=10m > > > > > > -Xmx512m seems only increase max size of heap rather than perm > division. > > > > > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > > > I found the required catalina files and I see 4 lines with the > > JAVA_OPTS > > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by > -Xmx512m > > > in > > > > the catalina.bat file but I still get the error message, what am I > > > suppose > > > > to do in that file? > > > > > > > > - Original Message - > > > > From: "netsql" <[EMAIL PROTECTED]> > > > > To: > > > > Sent: Sunday, November 27, 2005 10:09 PM > > > > Subject: Re: OT: OutOfMemory > > > > > > > > > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > > > > > > > Eric Plante wrote: > > > > > > I'm on windows XP and the only catalina files that might serve > for > > > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > > > > > > > > > > > > > - > > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > >
Re: OT: OutOfMemory
The only difference between StringBuilder and StringBuffer is that StringBuffer is synchronized...from what I read at least and yes I considered every other methods of String but I don't see any other ways to quickly grab substrings do you have suggestions? Instead of using StringBuilder, did you consider using StringBuffer as an alternative? Have you check all the available method within String class itself? On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > Because I need to insert a tag in front of every letters of > every > found given word and a closing. The word tested is 'create'(6 > letters) and it appears something like 830 times. > > After using a RegEx, I got the positions of those letters so I need > substrings of the main string to fill a StringBuilder with the parts not > containing the letters of the words. > > This loop is not there just to be fancy. > > --- > Well, if I wrote a recursive call which never returns, I could bring down > any system. Can you tell us why you need loop 5000 times? Instead of using > StringBuilder, did you consider using StringBuffer as an alternative? Have > you check all the available method within String class itself? > > This is the checklist I can think of for now, hope it helps. > > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > > > It wasn't there but I added it and whatever I used -Xmx or -XX, it > didn't > > work. I wrote 100m for the -XX... > > > > I also checked again where I could optimized and where I could find > memory > > leakage. Reducing the number of string meant using StringBuilder's > > insertthe slowness of that command makes it not an option. I > couldn't > > find any memory leakage. > > > > Where the program systematicaly crash is a loop where I do a substring > of > > the big string everytime(about 5000 loops).I then fill a StringBuilder > > which > > will eventualy be bigger than the main string. That's the fastest way I > > can > > do what need to be done and it needs to be fast. > > > > I'm starting to loose faith in Java...I'll ask a friend that > > isa.NETspecialist to see if.NET has that problem too...a problem Java > > shouldn't have... > > > > --- > > > > I found in my catalina.bat: > > set JAVA_OPTS= > > Instead of that, use: > > set JAVA_OPTS=-XX:MaxPermSize=10m > > > > -Xmx512m seems only increase max size of heap rather than perm division. > > > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > > I found the required catalina files and I see 4 lines with the > JAVA_OPTS > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > > in > > > the catalina.bat file but I still get the error message, what am I > > suppose > > > to do in that file? > > > > > > - Original Message - > > > From: "netsql" <[EMAIL PROTECTED]> > > > To: > > > Sent: Sunday, November 27, 2005 10:09 PM > > > Subject: Re: OT: OutOfMemory > > > > > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > > > > Eric Plante wrote: > > > > > I'm on windows XP and the only catalina files that might serve for > > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > > > > > > > - > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > Yujun Liang > [EMAIL PROTECTED] > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
for (Integer posLetter: positions){
String subText = fullText.substring(start, posLetter);
textFormat.append(subText);
subText = null; //not required
start = posLetter + 1;
}
with fullText = 5M and textFormat that's even bigger it crashes.
An friend tried with a 15M file using Lingo language and it worked without
problems and I bet .NET would have no problem either but I'll know tomorrow.
Sorry to hear that.
Would you please show some source code relative to the problem?
Well, 5000 loops of substring with a big string is terrible.
2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't
> work. I wrote 100m for the -XX...
>
> I also checked again where I could optimized and where I could find memory
> leakage. Reducing the number of string meant using StringBuilder's
> insertthe slowness of that command makes it not an option. I couldn't
> find any memory leakage.
>
> Where the program systematicaly crash is a loop where I do a substring of
> the big string everytime(about 5000 loops).I then fill a StringBuilder
which
> will eventualy be bigger than the main string. That's the fastest way I
can
> do what need to be done and it needs to be fast.
>
> I'm starting to loose faith in Java...I'll ask a friend that
> isa.NETspecialist to see if.NET has that problem too...a problem Java
> shouldn't have...
>
> ---
>
> I found in my catalina.bat:
> set JAVA_OPTS=
> Instead of that, use:
> set JAVA_OPTS=-XX:MaxPermSize=10m
>
> -Xmx512m seems only increase max size of heap rather than perm division.
>
> 2005/11/29, Eric Plante <[EMAIL PROTECTED]>:
> > I found the required catalina files and I see 4 lines with the JAVA_OPTS
> > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m
in
> > the catalina.bat file but I still get the error message, what am I
suppose
> > to do in that file?
> >
> > - Original Message -
> > From: "netsql" <[EMAIL PROTECTED]>
> > To:
> > Sent: Sunday, November 27, 2005 10:09 PM
> > Subject: Re: OT: OutOfMemory
> >
> >
> > >
> > > http://tomcat.apache.org/faq/memory.html#adjust
> > >
> > >
> > > Eric Plante wrote:
> > > > I'm on windows XP and the only catalina files that might serve for
> > > > configuration are Catalina.properties and catalina.policy
> > > >
> > > >
> > >
> > >
> > > -
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Instead of using StringBuilder, did you consider using StringBuffer as an alternative? Have you check all the available method within String class itself? On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > Because I need to insert a tag in front of every letters of > every > found given word and a closing. The word tested is 'create'(6 > letters) and it appears something like 830 times. > > After using a RegEx, I got the positions of those letters so I need > substrings of the main string to fill a StringBuilder with the parts not > containing the letters of the words. > > This loop is not there just to be fancy. > > --- > Well, if I wrote a recursive call which never returns, I could bring down > any system. Can you tell us why you need loop 5000 times? Instead of using > StringBuilder, did you consider using StringBuffer as an alternative? Have > you check all the available method within String class itself? > > This is the checklist I can think of for now, hope it helps. > > On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > > > It wasn't there but I added it and whatever I used -Xmx or -XX, it > didn't > > work. I wrote 100m for the -XX... > > > > I also checked again where I could optimized and where I could find > memory > > leakage. Reducing the number of string meant using StringBuilder's > > insertthe slowness of that command makes it not an option. I > couldn't > > find any memory leakage. > > > > Where the program systematicaly crash is a loop where I do a substring > of > > the big string everytime(about 5000 loops).I then fill a StringBuilder > > which > > will eventualy be bigger than the main string. That's the fastest way I > > can > > do what need to be done and it needs to be fast. > > > > I'm starting to loose faith in Java...I'll ask a friend that > > isa.NETspecialist to see if.NET has that problem too...a problem Java > > shouldn't have... > > > > --- > > > > I found in my catalina.bat: > > set JAVA_OPTS= > > Instead of that, use: > > set JAVA_OPTS=-XX:MaxPermSize=10m > > > > -Xmx512m seems only increase max size of heap rather than perm division. > > > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > > I found the required catalina files and I see 4 lines with the > JAVA_OPTS > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > > in > > > the catalina.bat file but I still get the error message, what am I > > suppose > > > to do in that file? > > > > > > - Original Message - > > > From: "netsql" <[EMAIL PROTECTED]> > > > To: > > > Sent: Sunday, November 27, 2005 10:09 PM > > > Subject: Re: OT: OutOfMemory > > > > > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > > > > Eric Plante wrote: > > > > > I'm on windows XP and the only catalina files that might serve for > > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > > > > > > > - > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > Yujun Liang > [EMAIL PROTECTED] > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED]
Re: OT: OutOfMemory
Because I need to insert a tag in front of every letters of every found given word and a closing. The word tested is 'create'(6 letters) and it appears something like 830 times. After using a RegEx, I got the positions of those letters so I need substrings of the main string to fill a StringBuilder with the parts not containing the letters of the words. This loop is not there just to be fancy. --- Well, if I wrote a recursive call which never returns, I could bring down any system. Can you tell us why you need loop 5000 times? Instead of using StringBuilder, did you consider using StringBuffer as an alternative? Have you check all the available method within String class itself? This is the checklist I can think of for now, hope it helps. On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't > work. I wrote 100m for the -XX... > > I also checked again where I could optimized and where I could find memory > leakage. Reducing the number of string meant using StringBuilder's > insertthe slowness of that command makes it not an option. I couldn't > find any memory leakage. > > Where the program systematicaly crash is a loop where I do a substring of > the big string everytime(about 5000 loops).I then fill a StringBuilder > which > will eventualy be bigger than the main string. That's the fastest way I > can > do what need to be done and it needs to be fast. > > I'm starting to loose faith in Java...I'll ask a friend that > isa.NETspecialist to see if.NET has that problem too...a problem Java > shouldn't have... > > --- > > I found in my catalina.bat: > set JAVA_OPTS= > Instead of that, use: > set JAVA_OPTS=-XX:MaxPermSize=10m > > -Xmx512m seems only increase max size of heap rather than perm division. > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > I found the required catalina files and I see 4 lines with the JAVA_OPTS > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > in > > the catalina.bat file but I still get the error message, what am I > suppose > > to do in that file? > > > > - Original Message - > > From: "netsql" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, November 27, 2005 10:09 PM > > Subject: Re: OT: OutOfMemory > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > Eric Plante wrote: > > > > I'm on windows XP and the only catalina files that might serve for > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Can you post your source code where you got the problem? On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > I'm using the internal Eclipse/Exadel Studio tomcat 5.5 but I think it > uses > the same installed tomcat server since I should havelinked Eclipse to it > but > it uses it own ser of xml files. I added 1024M to maximum memory but it > changed nothing. I couldn't find that 1024 in any xml files in the tomcat > directory... > > - > > > From Taskbar, right click Tomcat5 Service Icon, click "Configure". > > On configure window, choose "java" tab, enter > > Initial Memory Pool > Maximum Memory Pool. > > Regards > > On 11/29/05, Chen Jerry <[EMAIL PROTECTED]> wrote: > > > > I found in my catalina.bat: > > set JAVA_OPTS= > > Instead of that, use: > > set JAVA_OPTS=-XX:MaxPermSize=10m > > > > -Xmx512m seems only increase max size of heap rather than perm division. > > > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > > I found the required catalina files and I see 4 lines with the > JAVA_OPTS > > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > > in > > > the catalina.bat file but I still get the error message, what am I > > suppose > > > to do in that file? > > > > > > - Original Message - > > > From: "netsql" <[EMAIL PROTECTED]> > > > To: > > > Sent: Sunday, November 27, 2005 10:09 PM > > > Subject: Re: OT: OutOfMemory > > > > > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > > > > Eric Plante wrote: > > > > > I'm on windows XP and the only catalina files that might serve for > > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > > > > > > > - > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > Yujun Liang > [EMAIL PROTECTED] > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED]
Re: OT: OutOfMemory
I'm using the internal Eclipse/Exadel Studio tomcat 5.5 but I think it uses the same installed tomcat server since I should havelinked Eclipse to it but it uses it own ser of xml files. I added 1024M to maximum memory but it changed nothing. I couldn't find that 1024 in any xml files in the tomcat directory... - >From Taskbar, right click Tomcat5 Service Icon, click "Configure". On configure window, choose "java" tab, enter Initial Memory Pool Maximum Memory Pool. Regards On 11/29/05, Chen Jerry <[EMAIL PROTECTED]> wrote: > > I found in my catalina.bat: > set JAVA_OPTS= > Instead of that, use: > set JAVA_OPTS=-XX:MaxPermSize=10m > > -Xmx512m seems only increase max size of heap rather than perm division. > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > I found the required catalina files and I see 4 lines with the JAVA_OPTS > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > in > > the catalina.bat file but I still get the error message, what am I > suppose > > to do in that file? > > > > - Original Message ----- > > From: "netsql" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, November 27, 2005 10:09 PM > > Subject: Re: OT: OutOfMemory > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > Eric Plante wrote: > > > > I'm on windows XP and the only catalina files that might serve for > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Sorry to hear that. Would you please show some source code relative to the problem? Well, 5000 loops of substring with a big string is terrible. 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't > work. I wrote 100m for the -XX... > > I also checked again where I could optimized and where I could find memory > leakage. Reducing the number of string meant using StringBuilder's > insertthe slowness of that command makes it not an option. I couldn't > find any memory leakage. > > Where the program systematicaly crash is a loop where I do a substring of > the big string everytime(about 5000 loops).I then fill a StringBuilder which > will eventualy be bigger than the main string. That's the fastest way I can > do what need to be done and it needs to be fast. > > I'm starting to loose faith in Java...I'll ask a friend that > isa.NETspecialist to see if.NET has that problem too...a problem Java > shouldn't have... > > --- > > I found in my catalina.bat: > set JAVA_OPTS= > Instead of that, use: > set JAVA_OPTS=-XX:MaxPermSize=10m > > -Xmx512m seems only increase max size of heap rather than perm division. > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > I found the required catalina files and I see 4 lines with the JAVA_OPTS > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m in > > the catalina.bat file but I still get the error message, what am I suppose > > to do in that file? > > > > - Original Message - > > From: "netsql" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, November 27, 2005 10:09 PM > > Subject: Re: OT: OutOfMemory > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > Eric Plante wrote: > > > > I'm on windows XP and the only catalina files that might serve for > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Well, if I wrote a recursive call which never returns, I could bring down any system. Can you tell us why you need loop 5000 times? Instead of using StringBuilder, did you consider using StringBuffer as an alternative? Have you check all the available method within String class itself? This is the checklist I can think of for now, hope it helps. On 11/29/05, Eric Plante <[EMAIL PROTECTED]> wrote: > > It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't > work. I wrote 100m for the -XX... > > I also checked again where I could optimized and where I could find memory > leakage. Reducing the number of string meant using StringBuilder's > insertthe slowness of that command makes it not an option. I couldn't > find any memory leakage. > > Where the program systematicaly crash is a loop where I do a substring of > the big string everytime(about 5000 loops).I then fill a StringBuilder > which > will eventualy be bigger than the main string. That's the fastest way I > can > do what need to be done and it needs to be fast. > > I'm starting to loose faith in Java...I'll ask a friend that > isa.NETspecialist to see if.NET has that problem too...a problem Java > shouldn't have... > > --- > > I found in my catalina.bat: > set JAVA_OPTS= > Instead of that, use: > set JAVA_OPTS=-XX:MaxPermSize=10m > > -Xmx512m seems only increase max size of heap rather than perm division. > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > I found the required catalina files and I see 4 lines with the JAVA_OPTS > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > in > > the catalina.bat file but I still get the error message, what am I > suppose > > to do in that file? > > > > - Original Message - > > From: "netsql" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, November 27, 2005 10:09 PM > > Subject: Re: OT: OutOfMemory > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > Eric Plante wrote: > > > > I'm on windows XP and the only catalina files that might serve for > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED]
Re: OT: OutOfMemory
It wasn't there but I added it and whatever I used -Xmx or -XX, it didn't work. I wrote 100m for the -XX... I also checked again where I could optimized and where I could find memory leakage. Reducing the number of string meant using StringBuilder's insertthe slowness of that command makes it not an option. I couldn't find any memory leakage. Where the program systematicaly crash is a loop where I do a substring of the big string everytime(about 5000 loops).I then fill a StringBuilder which will eventualy be bigger than the main string. That's the fastest way I can do what need to be done and it needs to be fast. I'm starting to loose faith in Java...I'll ask a friend that isa.NETspecialist to see if.NET has that problem too...a problem Java shouldn't have... --- I found in my catalina.bat: set JAVA_OPTS= Instead of that, use: set JAVA_OPTS=-XX:MaxPermSize=10m -Xmx512m seems only increase max size of heap rather than perm division. 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > I found the required catalina files and I see 4 lines with the JAVA_OPTS > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m in > the catalina.bat file but I still get the error message, what am I suppose > to do in that file? > > - Original Message - > From: "netsql" <[EMAIL PROTECTED]> > To: > Sent: Sunday, November 27, 2005 10:09 PM > Subject: Re: OT: OutOfMemory > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > Eric Plante wrote: > > > I'm on windows XP and the only catalina files that might serve for > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
>From Taskbar, right click Tomcat5 Service Icon, click "Configure". On configure window, choose "java" tab, enter Initial Memory Pool Maximum Memory Pool. Regards On 11/29/05, Chen Jerry <[EMAIL PROTECTED]> wrote: > > I found in my catalina.bat: > set JAVA_OPTS= > Instead of that, use: > set JAVA_OPTS=-XX:MaxPermSize=10m > > -Xmx512m seems only increase max size of heap rather than perm division. > > 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > > I found the required catalina files and I see 4 lines with the JAVA_OPTS > > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m > in > > the catalina.bat file but I still get the error message, what am I > suppose > > to do in that file? > > > > - Original Message - > > From: "netsql" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, November 27, 2005 10:09 PM > > Subject: Re: OT: OutOfMemory > > > > > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > > > > Eric Plante wrote: > > > > I'm on windows XP and the only catalina files that might serve for > > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > > > > > > - > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Yujun Liang [EMAIL PROTECTED]
Re: OT: OutOfMemory
I found in my catalina.bat: set JAVA_OPTS= Instead of that, use: set JAVA_OPTS=-XX:MaxPermSize=10m -Xmx512m seems only increase max size of heap rather than perm division. 2005/11/29, Eric Plante <[EMAIL PROTECTED]>: > I found the required catalina files and I see 4 lines with the JAVA_OPTS > variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m in > the catalina.bat file but I still get the error message, what am I suppose > to do in that file? > > - Original Message - > From: "netsql" <[EMAIL PROTECTED]> > To: > Sent: Sunday, November 27, 2005 10:09 PM > Subject: Re: OT: OutOfMemory > > > > > > http://tomcat.apache.org/faq/memory.html#adjust > > > > > > Eric Plante wrote: > > > I'm on windows XP and the only catalina files that might serve for > > > configuration are Catalina.properties and catalina.policy > > > > > > > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
I found the required catalina files and I see 4 lines with the JAVA_OPTS variable. I tried replacing JAVA_OPTS and then %JAVA_OPTS% by -Xmx512m in the catalina.bat file but I still get the error message, what am I suppose to do in that file? - Original Message - From: "netsql" <[EMAIL PROTECTED]> To: Sent: Sunday, November 27, 2005 10:09 PM Subject: Re: OT: OutOfMemory > > http://tomcat.apache.org/faq/memory.html#adjust > > > Eric Plante wrote: > > I'm on windows XP and the only catalina files that might serve for > > configuration are Catalina.properties and catalina.policy > > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
http://tomcat.apache.org/faq/memory.html#adjust Eric Plante wrote: I'm on windows XP and the only catalina files that might serve for configuration are Catalina.properties and catalina.policy - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Well, I don't think configuration of properties and policy files
helps. But I am not sure. Why not try it out?
/bin/catalina.bat is for java options configuration, you can
find something like JAVA_OPTS, append -XX:MaxPermSize=10m (10m is my
choice in the fly, please replace it with your choice) with prefix
space and suffix space. And if you start tomcat with graphical
interface, when catalina.bat does not works, there's some tab in the
UI alllowing the corresponding configuration.
2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> I'm on windows XP and the only catalina files that might serve for
> configuration are Catalina.properties and catalina.policy
>
> In catalina.properties, there is those lines:
>
> tomcat.util.buf.StringCache.byte.enabled=true
> #tomcat.util.buf.StringCache.char.enabled=true
> #tomcat.util.buf.StringCache.trainThreshold=50
> #tomcat.util.buf.StringCache.cacheSize=5000
>
> Is there anything there I can modify to help?
>
> Thanks
>
>
>
> if your os is linux and like, it is bin/catalina.sh
>
> 2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> > Well, you use tomcat, right?
> > There is bin/catalina.bat, where you can specify -XX options.
> >
> > 2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> > > Well, heap size and each division has its default value. In fact, they
> > > are specified proper values, such as minimal size, maximal size,
> > > ratio, etc., according to requirement. Did you try customizing memory
> > > model of Hotspot at application startup? I suppose your problem can be
> > > solved by increase the maximal size of perm division at startup.
> > > You can start up as follows, but I am not sure:
> > > java -XX:MaxPermSize=10m
> > >
> > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > It uses hotspot.
> > > >
> > > > I don't append litteral strings but I append substrings of a String
> object
> > > > in my StringBuilders.
> > > >
> > > > By HD memory I meant physical.
> > > >
> > > > If I understand well, there is no solution to my problem, I will
> always be
> > > > limited to the heap size? That really troublesome, it should use the
> > > > physical memory when the heap overload.
> > > >
> > > > Thanks
> > > >
> > > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > > Thanks
> > > > >
> > > > > 1-How do I know if I use hotspot or not?
> > > > $ java -version
> > > >
> > > > > 2-Is StringBuilder using the same heap as String?
> > > >
> > > > "xxx" is regard as permniant object. does your StringBuilder leverages
> > > > sb.append("xxx")?
> > > > If so, I suppose it is the same to String s="xxx";sb.append(s);
> > > > > 3-What if I can't control the size of the Strings since they come
> from
> > > > files
> > > > > that can be as big as the HD memory?
> > > > String loaded seems not to be deal with in the same way as String s =
> "xxx"
> > > >
> > > > > 4-Is there a way to use the Hard Drive memory instead of the stack?
> > > > I have no idea what is Hard Drive memory, sorry.
> > > > and stack differs from heap, both differ from physical memory.
> > > >
> > > > >
> > > > > --
> > > > >
> > > > > Well, I suppose I can offer some tip that may help.
> > > > >
> > > > > Let me suppose you use Hotspot VM.
> > > > >
> > > > > Sun's Hotspot VM 's heap space consists of three divisions for young
> > > > > generation, old generation and perminant generation. Young
> generation
> > > > > refers to objects that are created and usually it died in a short
> > > > > time. The corresponding division leverages copying to collect
> garbage.
> > > > > When some object survives after several gc, It is moved to old
> > > > > generation division, where mark-and-sweep is leveraged. And the
> > > > > perminant gereration is where class objects reside, its default size
> > > > > is 4M(I am not certain).
> > > > >
> > > > > Well, in case of String s = ""; "" is put into division of
> > > > > perminant generation. Your String is huge enough to exceed the size
> > > > > limit and of course throws OutOfMemory error. You can increase only
> > > > > the size of division of perminant generation to solve the problem by
> > > > > specifying some -X option. I am sorry to say that I lose my notebook
> > > > > the day before yesterday, so I cannot give any further tip.
> > > > >
> > > > > Regards,
> > > > >
> > > > > Jerry
> > > > >
> > > > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > > > Hi,
> > > > > >
> > > > > > I have a struts application(1.1) using Eclipse and Exadel Studio
> with
> > > > > tomcat
> > > > > > 5.5.9 using Jave 5.0
> > > > > >
> > > > > > I have to deal with a huge String in memory, about 5-6M and every
> time I
> > > > > run
> > > > > > my web application, I get java.OutOfMemoryError: java heap
> > > > space...always
> > > > > at
> > > > > > the same place(I fill a StringBuilder with the main String + other
> > > > strings
> > > > > > so I am effectively dealin
Re: OT: OutOfMemory
I'm on windows XP and the only catalina files that might serve for
configuration are Catalina.properties and catalina.policy
In catalina.properties, there is those lines:
tomcat.util.buf.StringCache.byte.enabled=true
#tomcat.util.buf.StringCache.char.enabled=true
#tomcat.util.buf.StringCache.trainThreshold=50
#tomcat.util.buf.StringCache.cacheSize=5000
Is there anything there I can modify to help?
Thanks
if your os is linux and like, it is bin/catalina.sh
2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> Well, you use tomcat, right?
> There is bin/catalina.bat, where you can specify -XX options.
>
> 2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> > Well, heap size and each division has its default value. In fact, they
> > are specified proper values, such as minimal size, maximal size,
> > ratio, etc., according to requirement. Did you try customizing memory
> > model of Hotspot at application startup? I suppose your problem can be
> > solved by increase the maximal size of perm division at startup.
> > You can start up as follows, but I am not sure:
> > java -XX:MaxPermSize=10m
> >
> > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > It uses hotspot.
> > >
> > > I don't append litteral strings but I append substrings of a String
object
> > > in my StringBuilders.
> > >
> > > By HD memory I meant physical.
> > >
> > > If I understand well, there is no solution to my problem, I will
always be
> > > limited to the heap size? That really troublesome, it should use the
> > > physical memory when the heap overload.
> > >
> > > Thanks
> > >
> > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > Thanks
> > > >
> > > > 1-How do I know if I use hotspot or not?
> > > $ java -version
> > >
> > > > 2-Is StringBuilder using the same heap as String?
> > >
> > > "xxx" is regard as permniant object. does your StringBuilder leverages
> > > sb.append("xxx")?
> > > If so, I suppose it is the same to String s="xxx";sb.append(s);
> > > > 3-What if I can't control the size of the Strings since they come
from
> > > files
> > > > that can be as big as the HD memory?
> > > String loaded seems not to be deal with in the same way as String s =
"xxx"
> > >
> > > > 4-Is there a way to use the Hard Drive memory instead of the stack?
> > > I have no idea what is Hard Drive memory, sorry.
> > > and stack differs from heap, both differ from physical memory.
> > >
> > > >
> > > > --
> > > >
> > > > Well, I suppose I can offer some tip that may help.
> > > >
> > > > Let me suppose you use Hotspot VM.
> > > >
> > > > Sun's Hotspot VM 's heap space consists of three divisions for young
> > > > generation, old generation and perminant generation. Young
generation
> > > > refers to objects that are created and usually it died in a short
> > > > time. The corresponding division leverages copying to collect
garbage.
> > > > When some object survives after several gc, It is moved to old
> > > > generation division, where mark-and-sweep is leveraged. And the
> > > > perminant gereration is where class objects reside, its default size
> > > > is 4M(I am not certain).
> > > >
> > > > Well, in case of String s = ""; "" is put into division of
> > > > perminant generation. Your String is huge enough to exceed the size
> > > > limit and of course throws OutOfMemory error. You can increase only
> > > > the size of division of perminant generation to solve the problem by
> > > > specifying some -X option. I am sorry to say that I lose my notebook
> > > > the day before yesterday, so I cannot give any further tip.
> > > >
> > > > Regards,
> > > >
> > > > Jerry
> > > >
> > > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > > Hi,
> > > > >
> > > > > I have a struts application(1.1) using Eclipse and Exadel Studio
with
> > > > tomcat
> > > > > 5.5.9 using Jave 5.0
> > > > >
> > > > > I have to deal with a huge String in memory, about 5-6M and every
time I
> > > > run
> > > > > my web application, I get java.OutOfMemoryError: java heap
> > > space...always
> > > > at
> > > > > the same place(I fill a StringBuilder with the main String + other
> > > strings
> > > > > so I am effectively dealing with 2 huge strings at that point).
> > > > >
> > > > > When I run my application with a smaller string, it works fine so
I
> > > > checked
> > > > > for potential memory leak or bust but it seems to run just the
minimum
> > > > > strings and stringbuilder object the application requires and all
the
> > > > > objects should be destroyed properly.
> > > > >
> > > > > I checked the web and all I could find was to try raising the heap
space
> > > > > exept that java -server -Xmx512m doesn't see any server and it
doesn't
> > > > seem
> > > > > to be a good idea to raise the heap stack anyway but I saw a post
saying
> > > > > that Java 5.0 was using a proper heap size(1G although I don't
have 1G
> > > > RAM,
> > > > > I suppose it uses what it can.)
Re: OT: OutOfMemory
Well, since it's a wab appliation, it starts with Tomcat server, not java
but anyway, MaxPermSize doesn't seem to exist
I tried adding in server.xml but it either didn't work or
didn't recognize the property.
--
Well, heap size and each division has its default value. In fact, they
are specified proper values, such as minimal size, maximal size,
ratio, etc., according to requirement. Did you try customizing memory
model of Hotspot at application startup? I suppose your problem can be
solved by increase the maximal size of perm division at startup.
You can start up as follows, but I am not sure:
java -XX:MaxPermSize=10m
2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> It uses hotspot.
>
> I don't append litteral strings but I append substrings of a String object
> in my StringBuilders.
>
> By HD memory I meant physical.
>
> If I understand well, there is no solution to my problem, I will always be
> limited to the heap size? That really troublesome, it should use the
> physical memory when the heap overload.
>
> Thanks
>
> 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > Thanks
> >
> > 1-How do I know if I use hotspot or not?
> $ java -version
>
> > 2-Is StringBuilder using the same heap as String?
>
> "xxx" is regard as permniant object. does your StringBuilder leverages
> sb.append("xxx")?
> If so, I suppose it is the same to String s="xxx";sb.append(s);
> > 3-What if I can't control the size of the Strings since they come from
> files
> > that can be as big as the HD memory?
> String loaded seems not to be deal with in the same way as String s =
"xxx"
>
> > 4-Is there a way to use the Hard Drive memory instead of the stack?
> I have no idea what is Hard Drive memory, sorry.
> and stack differs from heap, both differ from physical memory.
>
> >
> > --
> >
> > Well, I suppose I can offer some tip that may help.
> >
> > Let me suppose you use Hotspot VM.
> >
> > Sun's Hotspot VM 's heap space consists of three divisions for young
> > generation, old generation and perminant generation. Young generation
> > refers to objects that are created and usually it died in a short
> > time. The corresponding division leverages copying to collect garbage.
> > When some object survives after several gc, It is moved to old
> > generation division, where mark-and-sweep is leveraged. And the
> > perminant gereration is where class objects reside, its default size
> > is 4M(I am not certain).
> >
> > Well, in case of String s = ""; "" is put into division of
> > perminant generation. Your String is huge enough to exceed the size
> > limit and of course throws OutOfMemory error. You can increase only
> > the size of division of perminant generation to solve the problem by
> > specifying some -X option. I am sorry to say that I lose my notebook
> > the day before yesterday, so I cannot give any further tip.
> >
> > Regards,
> >
> > Jerry
> >
> > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > Hi,
> > >
> > > I have a struts application(1.1) using Eclipse and Exadel Studio with
> > tomcat
> > > 5.5.9 using Jave 5.0
> > >
> > > I have to deal with a huge String in memory, about 5-6M and every time
I
> > run
> > > my web application, I get java.OutOfMemoryError: java heap
> space...always
> > at
> > > the same place(I fill a StringBuilder with the main String + other
> strings
> > > so I am effectively dealing with 2 huge strings at that point).
> > >
> > > When I run my application with a smaller string, it works fine so I
> > checked
> > > for potential memory leak or bust but it seems to run just the minimum
> > > strings and stringbuilder object the application requires and all the
> > > objects should be destroyed properly.
> > >
> > > I checked the web and all I could find was to try raising the heap
space
> > > exept that java -server -Xmx512m doesn't see any server and it doesn't
> > seem
> > > to be a good idea to raise the heap stack anyway but I saw a post
saying
> > > that Java 5.0 was using a proper heap size(1G although I don't have 1G
> > RAM,
> > > I suppose it uses what it can.)
> > >
> > > I always thought that if there wasn't enough space in memory,
> applications
> > > would use the HD as memory slowing down the application but at least
it
> > > wouldn't explode.
> > >
> > > Any idea how my problem could be solved? Are there any memory obscure
> > > restrictions to String and StringBuilder I should know that books
> doesn't
> > > say? I just can't see how 2 5M String in memory could be that much of
a
> > > problem in 2005.
> > >
> > > Thanks
> > >
> > >
> > > -
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PRO
Re: OT: OutOfMemory
if your os is linux and like, it is bin/catalina.sh
2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> Well, you use tomcat, right?
> There is bin/catalina.bat, where you can specify -XX options.
>
> 2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> > Well, heap size and each division has its default value. In fact, they
> > are specified proper values, such as minimal size, maximal size,
> > ratio, etc., according to requirement. Did you try customizing memory
> > model of Hotspot at application startup? I suppose your problem can be
> > solved by increase the maximal size of perm division at startup.
> > You can start up as follows, but I am not sure:
> > java -XX:MaxPermSize=10m
> >
> > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > It uses hotspot.
> > >
> > > I don't append litteral strings but I append substrings of a String object
> > > in my StringBuilders.
> > >
> > > By HD memory I meant physical.
> > >
> > > If I understand well, there is no solution to my problem, I will always be
> > > limited to the heap size? That really troublesome, it should use the
> > > physical memory when the heap overload.
> > >
> > > Thanks
> > >
> > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > Thanks
> > > >
> > > > 1-How do I know if I use hotspot or not?
> > > $ java -version
> > >
> > > > 2-Is StringBuilder using the same heap as String?
> > >
> > > "xxx" is regard as permniant object. does your StringBuilder leverages
> > > sb.append("xxx")?
> > > If so, I suppose it is the same to String s="xxx";sb.append(s);
> > > > 3-What if I can't control the size of the Strings since they come from
> > > files
> > > > that can be as big as the HD memory?
> > > String loaded seems not to be deal with in the same way as String s =
> > > "xxx"
> > >
> > > > 4-Is there a way to use the Hard Drive memory instead of the stack?
> > > I have no idea what is Hard Drive memory, sorry.
> > > and stack differs from heap, both differ from physical memory.
> > >
> > > >
> > > > --
> > > >
> > > > Well, I suppose I can offer some tip that may help.
> > > >
> > > > Let me suppose you use Hotspot VM.
> > > >
> > > > Sun's Hotspot VM 's heap space consists of three divisions for young
> > > > generation, old generation and perminant generation. Young generation
> > > > refers to objects that are created and usually it died in a short
> > > > time. The corresponding division leverages copying to collect garbage.
> > > > When some object survives after several gc, It is moved to old
> > > > generation division, where mark-and-sweep is leveraged. And the
> > > > perminant gereration is where class objects reside, its default size
> > > > is 4M(I am not certain).
> > > >
> > > > Well, in case of String s = ""; "" is put into division of
> > > > perminant generation. Your String is huge enough to exceed the size
> > > > limit and of course throws OutOfMemory error. You can increase only
> > > > the size of division of perminant generation to solve the problem by
> > > > specifying some -X option. I am sorry to say that I lose my notebook
> > > > the day before yesterday, so I cannot give any further tip.
> > > >
> > > > Regards,
> > > >
> > > > Jerry
> > > >
> > > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > > Hi,
> > > > >
> > > > > I have a struts application(1.1) using Eclipse and Exadel Studio with
> > > > tomcat
> > > > > 5.5.9 using Jave 5.0
> > > > >
> > > > > I have to deal with a huge String in memory, about 5-6M and every
> > > > > time I
> > > > run
> > > > > my web application, I get java.OutOfMemoryError: java heap
> > > space...always
> > > > at
> > > > > the same place(I fill a StringBuilder with the main String + other
> > > strings
> > > > > so I am effectively dealing with 2 huge strings at that point).
> > > > >
> > > > > When I run my application with a smaller string, it works fine so I
> > > > checked
> > > > > for potential memory leak or bust but it seems to run just the minimum
> > > > > strings and stringbuilder object the application requires and all the
> > > > > objects should be destroyed properly.
> > > > >
> > > > > I checked the web and all I could find was to try raising the heap
> > > > > space
> > > > > exept that java -server -Xmx512m doesn't see any server and it doesn't
> > > > seem
> > > > > to be a good idea to raise the heap stack anyway but I saw a post
> > > > > saying
> > > > > that Java 5.0 was using a proper heap size(1G although I don't have 1G
> > > > RAM,
> > > > > I suppose it uses what it can.)
> > > > >
> > > > > I always thought that if there wasn't enough space in memory,
> > > applications
> > > > > would use the HD as memory slowing down the application but at least
> > > > > it
> > > > > wouldn't explode.
> > > > >
> > > > > Any idea how my problem could be solved? Are there any memory obscure
> > > > > restrictions to String and StringBuilder I should know that books
> > > doesn't
> > > > > say? I just can't s
Re: OT: OutOfMemory
Well, you use tomcat, right?
There is bin/catalina.bat, where you can specify -XX options.
2005/11/28, Chen Jerry <[EMAIL PROTECTED]>:
> Well, heap size and each division has its default value. In fact, they
> are specified proper values, such as minimal size, maximal size,
> ratio, etc., according to requirement. Did you try customizing memory
> model of Hotspot at application startup? I suppose your problem can be
> solved by increase the maximal size of perm division at startup.
> You can start up as follows, but I am not sure:
> java -XX:MaxPermSize=10m
>
> 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > It uses hotspot.
> >
> > I don't append litteral strings but I append substrings of a String object
> > in my StringBuilders.
> >
> > By HD memory I meant physical.
> >
> > If I understand well, there is no solution to my problem, I will always be
> > limited to the heap size? That really troublesome, it should use the
> > physical memory when the heap overload.
> >
> > Thanks
> >
> > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > Thanks
> > >
> > > 1-How do I know if I use hotspot or not?
> > $ java -version
> >
> > > 2-Is StringBuilder using the same heap as String?
> >
> > "xxx" is regard as permniant object. does your StringBuilder leverages
> > sb.append("xxx")?
> > If so, I suppose it is the same to String s="xxx";sb.append(s);
> > > 3-What if I can't control the size of the Strings since they come from
> > files
> > > that can be as big as the HD memory?
> > String loaded seems not to be deal with in the same way as String s = "xxx"
> >
> > > 4-Is there a way to use the Hard Drive memory instead of the stack?
> > I have no idea what is Hard Drive memory, sorry.
> > and stack differs from heap, both differ from physical memory.
> >
> > >
> > > --
> > >
> > > Well, I suppose I can offer some tip that may help.
> > >
> > > Let me suppose you use Hotspot VM.
> > >
> > > Sun's Hotspot VM 's heap space consists of three divisions for young
> > > generation, old generation and perminant generation. Young generation
> > > refers to objects that are created and usually it died in a short
> > > time. The corresponding division leverages copying to collect garbage.
> > > When some object survives after several gc, It is moved to old
> > > generation division, where mark-and-sweep is leveraged. And the
> > > perminant gereration is where class objects reside, its default size
> > > is 4M(I am not certain).
> > >
> > > Well, in case of String s = ""; "" is put into division of
> > > perminant generation. Your String is huge enough to exceed the size
> > > limit and of course throws OutOfMemory error. You can increase only
> > > the size of division of perminant generation to solve the problem by
> > > specifying some -X option. I am sorry to say that I lose my notebook
> > > the day before yesterday, so I cannot give any further tip.
> > >
> > > Regards,
> > >
> > > Jerry
> > >
> > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > > Hi,
> > > >
> > > > I have a struts application(1.1) using Eclipse and Exadel Studio with
> > > tomcat
> > > > 5.5.9 using Jave 5.0
> > > >
> > > > I have to deal with a huge String in memory, about 5-6M and every time I
> > > run
> > > > my web application, I get java.OutOfMemoryError: java heap
> > space...always
> > > at
> > > > the same place(I fill a StringBuilder with the main String + other
> > strings
> > > > so I am effectively dealing with 2 huge strings at that point).
> > > >
> > > > When I run my application with a smaller string, it works fine so I
> > > checked
> > > > for potential memory leak or bust but it seems to run just the minimum
> > > > strings and stringbuilder object the application requires and all the
> > > > objects should be destroyed properly.
> > > >
> > > > I checked the web and all I could find was to try raising the heap space
> > > > exept that java -server -Xmx512m doesn't see any server and it doesn't
> > > seem
> > > > to be a good idea to raise the heap stack anyway but I saw a post saying
> > > > that Java 5.0 was using a proper heap size(1G although I don't have 1G
> > > RAM,
> > > > I suppose it uses what it can.)
> > > >
> > > > I always thought that if there wasn't enough space in memory,
> > applications
> > > > would use the HD as memory slowing down the application but at least it
> > > > wouldn't explode.
> > > >
> > > > Any idea how my problem could be solved? Are there any memory obscure
> > > > restrictions to String and StringBuilder I should know that books
> > doesn't
> > > > say? I just can't see how 2 5M String in memory could be that much of a
> > > > problem in 2005.
> > > >
> > > > Thanks
> > > >
> > > >
> > > > -
> > > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > > For additional commands, e-mail: [EMAIL PROTECTED]
> > > >
> > > >
> > >
> > > ---
Re: OT: OutOfMemory
Well, heap size and each division has its default value. In fact, they
are specified proper values, such as minimal size, maximal size,
ratio, etc., according to requirement. Did you try customizing memory
model of Hotspot at application startup? I suppose your problem can be
solved by increase the maximal size of perm division at startup.
You can start up as follows, but I am not sure:
java -XX:MaxPermSize=10m
2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> It uses hotspot.
>
> I don't append litteral strings but I append substrings of a String object
> in my StringBuilders.
>
> By HD memory I meant physical.
>
> If I understand well, there is no solution to my problem, I will always be
> limited to the heap size? That really troublesome, it should use the
> physical memory when the heap overload.
>
> Thanks
>
> 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > Thanks
> >
> > 1-How do I know if I use hotspot or not?
> $ java -version
>
> > 2-Is StringBuilder using the same heap as String?
>
> "xxx" is regard as permniant object. does your StringBuilder leverages
> sb.append("xxx")?
> If so, I suppose it is the same to String s="xxx";sb.append(s);
> > 3-What if I can't control the size of the Strings since they come from
> files
> > that can be as big as the HD memory?
> String loaded seems not to be deal with in the same way as String s = "xxx"
>
> > 4-Is there a way to use the Hard Drive memory instead of the stack?
> I have no idea what is Hard Drive memory, sorry.
> and stack differs from heap, both differ from physical memory.
>
> >
> > --
> >
> > Well, I suppose I can offer some tip that may help.
> >
> > Let me suppose you use Hotspot VM.
> >
> > Sun's Hotspot VM 's heap space consists of three divisions for young
> > generation, old generation and perminant generation. Young generation
> > refers to objects that are created and usually it died in a short
> > time. The corresponding division leverages copying to collect garbage.
> > When some object survives after several gc, It is moved to old
> > generation division, where mark-and-sweep is leveraged. And the
> > perminant gereration is where class objects reside, its default size
> > is 4M(I am not certain).
> >
> > Well, in case of String s = ""; "" is put into division of
> > perminant generation. Your String is huge enough to exceed the size
> > limit and of course throws OutOfMemory error. You can increase only
> > the size of division of perminant generation to solve the problem by
> > specifying some -X option. I am sorry to say that I lose my notebook
> > the day before yesterday, so I cannot give any further tip.
> >
> > Regards,
> >
> > Jerry
> >
> > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > > Hi,
> > >
> > > I have a struts application(1.1) using Eclipse and Exadel Studio with
> > tomcat
> > > 5.5.9 using Jave 5.0
> > >
> > > I have to deal with a huge String in memory, about 5-6M and every time I
> > run
> > > my web application, I get java.OutOfMemoryError: java heap
> space...always
> > at
> > > the same place(I fill a StringBuilder with the main String + other
> strings
> > > so I am effectively dealing with 2 huge strings at that point).
> > >
> > > When I run my application with a smaller string, it works fine so I
> > checked
> > > for potential memory leak or bust but it seems to run just the minimum
> > > strings and stringbuilder object the application requires and all the
> > > objects should be destroyed properly.
> > >
> > > I checked the web and all I could find was to try raising the heap space
> > > exept that java -server -Xmx512m doesn't see any server and it doesn't
> > seem
> > > to be a good idea to raise the heap stack anyway but I saw a post saying
> > > that Java 5.0 was using a proper heap size(1G although I don't have 1G
> > RAM,
> > > I suppose it uses what it can.)
> > >
> > > I always thought that if there wasn't enough space in memory,
> applications
> > > would use the HD as memory slowing down the application but at least it
> > > wouldn't explode.
> > >
> > > Any idea how my problem could be solved? Are there any memory obscure
> > > restrictions to String and StringBuilder I should know that books
> doesn't
> > > say? I just can't see how 2 5M String in memory could be that much of a
> > > problem in 2005.
> > >
> > > Thanks
> > >
> > >
> > > -
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
>
Re: OT: OutOfMemory
It uses hotspot.
I don't append litteral strings but I append substrings of a String object
in my StringBuilders.
By HD memory I meant physical.
If I understand well, there is no solution to my problem, I will always be
limited to the heap size? That really troublesome, it should use the
physical memory when the heap overload.
Thanks
2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> Thanks
>
> 1-How do I know if I use hotspot or not?
$ java -version
> 2-Is StringBuilder using the same heap as String?
"xxx" is regard as permniant object. does your StringBuilder leverages
sb.append("xxx")?
If so, I suppose it is the same to String s="xxx";sb.append(s);
> 3-What if I can't control the size of the Strings since they come from
files
> that can be as big as the HD memory?
String loaded seems not to be deal with in the same way as String s = "xxx"
> 4-Is there a way to use the Hard Drive memory instead of the stack?
I have no idea what is Hard Drive memory, sorry.
and stack differs from heap, both differ from physical memory.
>
> --
>
> Well, I suppose I can offer some tip that may help.
>
> Let me suppose you use Hotspot VM.
>
> Sun's Hotspot VM 's heap space consists of three divisions for young
> generation, old generation and perminant generation. Young generation
> refers to objects that are created and usually it died in a short
> time. The corresponding division leverages copying to collect garbage.
> When some object survives after several gc, It is moved to old
> generation division, where mark-and-sweep is leveraged. And the
> perminant gereration is where class objects reside, its default size
> is 4M(I am not certain).
>
> Well, in case of String s = ""; "" is put into division of
> perminant generation. Your String is huge enough to exceed the size
> limit and of course throws OutOfMemory error. You can increase only
> the size of division of perminant generation to solve the problem by
> specifying some -X option. I am sorry to say that I lose my notebook
> the day before yesterday, so I cannot give any further tip.
>
> Regards,
>
> Jerry
>
> 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > Hi,
> >
> > I have a struts application(1.1) using Eclipse and Exadel Studio with
> tomcat
> > 5.5.9 using Jave 5.0
> >
> > I have to deal with a huge String in memory, about 5-6M and every time I
> run
> > my web application, I get java.OutOfMemoryError: java heap
space...always
> at
> > the same place(I fill a StringBuilder with the main String + other
strings
> > so I am effectively dealing with 2 huge strings at that point).
> >
> > When I run my application with a smaller string, it works fine so I
> checked
> > for potential memory leak or bust but it seems to run just the minimum
> > strings and stringbuilder object the application requires and all the
> > objects should be destroyed properly.
> >
> > I checked the web and all I could find was to try raising the heap space
> > exept that java -server -Xmx512m doesn't see any server and it doesn't
> seem
> > to be a good idea to raise the heap stack anyway but I saw a post saying
> > that Java 5.0 was using a proper heap size(1G although I don't have 1G
> RAM,
> > I suppose it uses what it can.)
> >
> > I always thought that if there wasn't enough space in memory,
applications
> > would use the HD as memory slowing down the application but at least it
> > wouldn't explode.
> >
> > Any idea how my problem could be solved? Are there any memory obscure
> > restrictions to String and StringBuilder I should know that books
doesn't
> > say? I just can't see how 2 5M String in memory could be that much of a
> > problem in 2005.
> >
> > Thanks
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> Thanks
>
> 1-How do I know if I use hotspot or not?
$ java -version
> 2-Is StringBuilder using the same heap as String?
"xxx" is regard as permniant object. does your StringBuilder leverages
sb.append("xxx")?
If so, I suppose it is the same to String s="xxx";sb.append(s);
> 3-What if I can't control the size of the Strings since they come from files
> that can be as big as the HD memory?
String loaded seems not to be deal with in the same way as String s = "xxx"
> 4-Is there a way to use the Hard Drive memory instead of the stack?
I have no idea what is Hard Drive memory, sorry.
and stack differs from heap, both differ from physical memory.
>
> --
>
> Well, I suppose I can offer some tip that may help.
>
> Let me suppose you use Hotspot VM.
>
> Sun's Hotspot VM 's heap space consists of three divisions for young
> generation, old generation and perminant generation. Young generation
> refers to objects that are created and usually it died in a short
> time. The corresponding division leverages copying to collect garbage.
> When some object survives after several gc, It is moved to old
> generation division, where mark-and-sweep is leveraged. And the
> perminant gereration is where class objects reside, its default size
> is 4M(I am not certain).
>
> Well, in case of String s = ""; "" is put into division of
> perminant generation. Your String is huge enough to exceed the size
> limit and of course throws OutOfMemory error. You can increase only
> the size of division of perminant generation to solve the problem by
> specifying some -X option. I am sorry to say that I lose my notebook
> the day before yesterday, so I cannot give any further tip.
>
> Regards,
>
> Jerry
>
> 2005/11/28, Eric Plante <[EMAIL PROTECTED]>:
> > Hi,
> >
> > I have a struts application(1.1) using Eclipse and Exadel Studio with
> tomcat
> > 5.5.9 using Jave 5.0
> >
> > I have to deal with a huge String in memory, about 5-6M and every time I
> run
> > my web application, I get java.OutOfMemoryError: java heap space...always
> at
> > the same place(I fill a StringBuilder with the main String + other strings
> > so I am effectively dealing with 2 huge strings at that point).
> >
> > When I run my application with a smaller string, it works fine so I
> checked
> > for potential memory leak or bust but it seems to run just the minimum
> > strings and stringbuilder object the application requires and all the
> > objects should be destroyed properly.
> >
> > I checked the web and all I could find was to try raising the heap space
> > exept that java -server -Xmx512m doesn't see any server and it doesn't
> seem
> > to be a good idea to raise the heap stack anyway but I saw a post saying
> > that Java 5.0 was using a proper heap size(1G although I don't have 1G
> RAM,
> > I suppose it uses what it can.)
> >
> > I always thought that if there wasn't enough space in memory, applications
> > would use the HD as memory slowing down the application but at least it
> > wouldn't explode.
> >
> > Any idea how my problem could be solved? Are there any memory obscure
> > restrictions to String and StringBuilder I should know that books doesn't
> > say? I just can't see how 2 5M String in memory could be that much of a
> > problem in 2005.
> >
> > Thanks
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Well, It's -XX:MaxPermSize option rather than some -X option; you can refer to this link for more information: http://java.sun.com/j2se/1.5/pdf/jdk50_ts_guide.pdf Regards, Jerry 2005/11/28, Chen Jerry <[EMAIL PROTECTED]>: > Well, I suppose I can offer some tip that may help. > > Let me suppose you use Hotspot VM. > > Sun's Hotspot VM 's heap space consists of three divisions for young > generation, old generation and perminant generation. Young generation > refers to objects that are created and usually it died in a short > time. The corresponding division leverages copying to collect garbage. > When some object survives after several gc, It is moved to old > generation division, where mark-and-sweep is leveraged. And the > perminant gereration is where class objects reside, its default size > is 4M(I am not certain). > > Well, in case of String s = ""; "" is put into division of > perminant generation. Your String is huge enough to exceed the size > limit and of course throws OutOfMemory error. You can increase only > the size of division of perminant generation to solve the problem by > specifying some -X option. I am sorry to say that I lose my notebook > the day before yesterday, so I cannot give any further tip. > > Regards, > > Jerry > > 2005/11/28, Eric Plante <[EMAIL PROTECTED]>: > > Hi, > > > > I have a struts application(1.1) using Eclipse and Exadel Studio with tomcat > > 5.5.9 using Jave 5.0 > > > > I have to deal with a huge String in memory, about 5-6M and every time I run > > my web application, I get java.OutOfMemoryError: java heap space...always at > > the same place(I fill a StringBuilder with the main String + other strings > > so I am effectively dealing with 2 huge strings at that point). > > > > When I run my application with a smaller string, it works fine so I checked > > for potential memory leak or bust but it seems to run just the minimum > > strings and stringbuilder object the application requires and all the > > objects should be destroyed properly. > > > > I checked the web and all I could find was to try raising the heap space > > exept that java -server -Xmx512m doesn't see any server and it doesn't seem > > to be a good idea to raise the heap stack anyway but I saw a post saying > > that Java 5.0 was using a proper heap size(1G although I don't have 1G RAM, > > I suppose it uses what it can.) > > > > I always thought that if there wasn't enough space in memory, applications > > would use the HD as memory slowing down the application but at least it > > wouldn't explode. > > > > Any idea how my problem could be solved? Are there any memory obscure > > restrictions to String and StringBuilder I should know that books doesn't > > say? I just can't see how 2 5M String in memory could be that much of a > > problem in 2005. > > > > Thanks > > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Thanks 1-How do I know if I use hotspot or not? 2-Is StringBuilder using the same heap as String? 3-What if I can't control the size of the Strings since they come from files that can be as big as the HD memory? 4-Is there a way to use the Hard Drive memory instead of the stack? -- Well, I suppose I can offer some tip that may help. Let me suppose you use Hotspot VM. Sun's Hotspot VM 's heap space consists of three divisions for young generation, old generation and perminant generation. Young generation refers to objects that are created and usually it died in a short time. The corresponding division leverages copying to collect garbage. When some object survives after several gc, It is moved to old generation division, where mark-and-sweep is leveraged. And the perminant gereration is where class objects reside, its default size is 4M(I am not certain). Well, in case of String s = ""; "" is put into division of perminant generation. Your String is huge enough to exceed the size limit and of course throws OutOfMemory error. You can increase only the size of division of perminant generation to solve the problem by specifying some -X option. I am sorry to say that I lose my notebook the day before yesterday, so I cannot give any further tip. Regards, Jerry 2005/11/28, Eric Plante <[EMAIL PROTECTED]>: > Hi, > > I have a struts application(1.1) using Eclipse and Exadel Studio with tomcat > 5.5.9 using Jave 5.0 > > I have to deal with a huge String in memory, about 5-6M and every time I run > my web application, I get java.OutOfMemoryError: java heap space...always at > the same place(I fill a StringBuilder with the main String + other strings > so I am effectively dealing with 2 huge strings at that point). > > When I run my application with a smaller string, it works fine so I checked > for potential memory leak or bust but it seems to run just the minimum > strings and stringbuilder object the application requires and all the > objects should be destroyed properly. > > I checked the web and all I could find was to try raising the heap space > exept that java -server -Xmx512m doesn't see any server and it doesn't seem > to be a good idea to raise the heap stack anyway but I saw a post saying > that Java 5.0 was using a proper heap size(1G although I don't have 1G RAM, > I suppose it uses what it can.) > > I always thought that if there wasn't enough space in memory, applications > would use the HD as memory slowing down the application but at least it > wouldn't explode. > > Any idea how my problem could be solved? Are there any memory obscure > restrictions to String and StringBuilder I should know that books doesn't > say? I just can't see how 2 5M String in memory could be that much of a > problem in 2005. > > Thanks > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OT: OutOfMemory
Well, I suppose I can offer some tip that may help. Let me suppose you use Hotspot VM. Sun's Hotspot VM 's heap space consists of three divisions for young generation, old generation and perminant generation. Young generation refers to objects that are created and usually it died in a short time. The corresponding division leverages copying to collect garbage. When some object survives after several gc, It is moved to old generation division, where mark-and-sweep is leveraged. And the perminant gereration is where class objects reside, its default size is 4M(I am not certain). Well, in case of String s = ""; "" is put into division of perminant generation. Your String is huge enough to exceed the size limit and of course throws OutOfMemory error. You can increase only the size of division of perminant generation to solve the problem by specifying some -X option. I am sorry to say that I lose my notebook the day before yesterday, so I cannot give any further tip. Regards, Jerry 2005/11/28, Eric Plante <[EMAIL PROTECTED]>: > Hi, > > I have a struts application(1.1) using Eclipse and Exadel Studio with tomcat > 5.5.9 using Jave 5.0 > > I have to deal with a huge String in memory, about 5-6M and every time I run > my web application, I get java.OutOfMemoryError: java heap space...always at > the same place(I fill a StringBuilder with the main String + other strings > so I am effectively dealing with 2 huge strings at that point). > > When I run my application with a smaller string, it works fine so I checked > for potential memory leak or bust but it seems to run just the minimum > strings and stringbuilder object the application requires and all the > objects should be destroyed properly. > > I checked the web and all I could find was to try raising the heap space > exept that java -server -Xmx512m doesn't see any server and it doesn't seem > to be a good idea to raise the heap stack anyway but I saw a post saying > that Java 5.0 was using a proper heap size(1G although I don't have 1G RAM, > I suppose it uses what it can.) > > I always thought that if there wasn't enough space in memory, applications > would use the HD as memory slowing down the application but at least it > wouldn't explode. > > Any idea how my problem could be solved? Are there any memory obscure > restrictions to String and StringBuilder I should know that books doesn't > say? I just can't see how 2 5M String in memory could be that much of a > problem in 2005. > > Thanks > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
