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
I agree; we have reproducible instances where PermGen is not set to our
requirements on the Tomcat startup parameters and it will cause a lockup
every time. Do some JMX monitoring and you may discover a memory spike
that's killing Tomcat.
Bill
-Original Message-
From: Jeff MAURY
Hi Kirill,
Like Mark, Bill and Jeff said, those threads are normal request-processing
threads. I have included a script that might help with isolating high CPU
issues with Tomcat.
Also, I think it might be helpful to see how the Java heap is performing as
well.
Please bring up Jconsole and let
Hi Kirill,
I mistook that the CPU issue clears itself. Sorry. It may or may not be
related to Garbage-collection settings then.
-Shanti
On Thu, Sep 27, 2012 at 2:17 PM, Shanti Suresh sha...@umich.edu wrote:
Hi Kirill,
Like Mark, Bill and Jeff said, those threads are
Thanks for all the advice everyone!
There is a possibility that the CPU is caused by an app thread - I
am looking into that possibility. Will let you know when I find
out more.
Thanks,
Kirill
On 9/27/12 12:17 PM, Shanti Suresh wrote:
I have a question about maxHttpHeaderSize [0]. In Apache httpd, there
are two different parameters that affect the maximum size of an HTTP
header, limitRequestFieldSize and limitRequestLine. [1] These
configuration values specify about 8 kilobytes per _line_ in the
incoming request. However, in