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 <app> as follows, but I am not sure:
> > java -XX:MaxPermSize=10m <app>
> >
> > 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 = "xxxx"; "xxxx" 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
> > > > >
> > > > >
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