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
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
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
James,
On 6/20/12 12:27 PM, James Lampert wrote:
We just had a report of extremely high CPU usage from the Tomcat
job on one of our customer installations. A WRKACTJOB screen shot
from before we forcibly shut Tomcat down and restarted it shows:
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