Kirill Kireyev kir...@instagrok.com wrote:
Thanks for all your thorough advice Shanti! (and everyone else)
Here are my findings so far:
0) My servlet sessions store a large number (~10s of M) or data in RAM.
This is by design, to optimize performance. I can also have ~3K active
sessions at
Aren't you're clients polling the server, this may cause the session not to
expire even if the user is not using the UI ?
Jeff
On Sat, Oct 6, 2012 at 9:42 PM, Mark Thomas ma...@apache.org wrote:
Kirill Kireyev kir...@instagrok.com wrote:
Thanks for all your thorough advice Shanti! (and
tips.
Thanks.
-Shanti
On Thu, Oct 4, 2012 at 2:08 PM, Jeff MAURY jeffma...@gmail.com wrote:
Le 4 oct. 2012 14:38, Caldarale, Charles R chuck.caldar...@unisys.com
a
écrit :
From: Kirill Kireyev [mailto:kir...@instagrok.com]
Subject: Re: high CPU usage
From: Kirill Kireyev [mailto:kir...@instagrok.com]
Subject: Re: high CPU usage on tomcat 7
Perhaps what I need is to have the JVM do garbage collections more
frequently, so that they don't become a huge CPU-hogging ordeals
when they do happen.
That's not how it works. The amount of time
Le 4 oct. 2012 14:38, Caldarale, Charles R chuck.caldar...@unisys.com a
écrit :
From: Kirill Kireyev [mailto:kir...@instagrok.com]
Subject: Re: high CPU usage on tomcat 7
Perhaps what I need is to have the JVM do garbage collections more
frequently, so that they don't become a huge CPU
...@gmail.com]
Sent: September-27-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I have the same problem on my ubuntu
ci machine Did you monitor your tomcat with jmx ?
Jeff
-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I have the same problem on my ubuntu
ci machine Did you monitor your tomcat with jmx ?
Jeff
-
To unsubscribe
a memory spike
that's killing Tomcat.
Bill
-Original Message-
From: Jeff MAURY [mailto:jeffma...@gmail.com jeffma...@gmail.com]
Sent: September-27-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I have the same
le ($l = LOG) {
chop $l;
$pid = $l;
$pid =~ s/webinf.*//g;
$pid =~ s/ *//g;
## Hex PID is available in the Sun HotSpot Stack Trace */
$hex_pid = sprintf("%#x", $pid);
@values = split(/\s+/, $l)
print "PID\tCPU\tMem\tJStack Info\n";
while ($l = LOG) {
chop $l;
$pid = $l;
$pid =~ s/webinf.*//g;
$pid =~ s/ *//g;
## Hex PID is available in the Sun HotSpot Stack Trace */
$hex_pid = sprintf("%#x", $pid);
@values = split(/\s+/, $l);
I don't think a cpu loop will make tomcat stopping responding to requests
I will make it very slow to respond
But a shortage on memory is hard to recover
Jeff
Le vendredi 28 septembre 2012, mailingl...@j-b-s.de a écrit :
Maybe an infinite loop? We observed something similar due to a bug in the
Well, if you have 4 cores and all cores are looping tomcat definitely will not
respond any more...
Von meinem iPad gesendet
Am 30.09.2012 um 12:42 schrieb Jeff MAURY jeffma...@jeffmaury.com:
I don't think a cpu loop will make tomcat stopping responding to requests
I will make it very slow to
: September-27-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I have the same problem on my ubuntu
ci machine Did you monitor your tomcat with jmx ?
Jeff
Hi!
I'm periodically getting unduly high (100%) CPU usage by the tomcat
process on my server. This problems happens intermittently, several
times a week. When the server goes into this high CPU it does not come
back (and becomes unresponsive to new requests), and the only recourse
is to
Kirill Kireyev kir...@instagrok.com wrote:
Hi!
I'm periodically getting unduly high (100%) CPU usage by the tomcat
process on my server. This problems happens intermittently, several
times a week. When the server goes into this high CPU it does not come
back (and becomes unresponsive to new
This is probably due to out of memory, I have the same problem on my ubuntu
ci machine
Did you monitor your tomcat with jmx ?
Jeff
Le 27 sept. 2012 17:39, Kirill Kireyev kir...@instagrok.com a écrit :
Hi!
I'm periodically getting unduly high (100%) CPU usage by the tomcat
process on my
[mailto:jeffma...@gmail.com]
Sent: September-27-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I have the same problem on my ubuntu
ci machine Did you monitor your tomcat with jmx ?
Jeff
Le 27 sept. 2012 17:39, Kirill Kireyev kir
a memory spike
that's killing Tomcat.
Bill
-Original Message-
From: Jeff MAURY [mailto:jeffma...@gmail.com]
Sent: September-27-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I have the same problem on my ubuntu
ci
JMX monitoring and you may discover a memory spike
that's killing Tomcat.
Bill
-Original Message-
From: Jeff MAURY [mailto:jeffma...@gmail.com]
Sent: September-27-2012 2:01 PM
To: Tomcat Users List
Subject: Re: high CPU usage on tomcat 7
This is probably due to out of memory, I
DOUT);
close LOG;
--end of script --
Thanks.
-Shanti
On Thu, Sep 27, 2012 at 2:11 PM, Bill Miller
millebi.subscripti...@gmail.com wrote:
I agree; we have reproducible instances where PermGen is not set to our
requireme
the screen
shot was taken, the QP0ZSPWT job was taking up what appears to be
more than an entire processor, even though it's in a time-wait
state.
Based on a Google search on tomcat 7 high cpu usage, I'm
suspecting a previously unknown tightloop in our application (which
was what I suspected
an entire processor, even though it's in a time-wait state.
Based on a Google search on tomcat 7 high cpu usage, I'm suspecting a
previously unknown tightloop in our application (which was what I
suspected even before I did the Google search). The pages I looked at
also said something about profiling
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