Thank you to the several people who made suggestions, either on the list
or by direct email!
I think I have solved the problem by simply using the -server option to
java when starting tomcat. By default tomcat uses the default VM, which
for Sun JDK1.5 is the client VM. By default the client
Hi, Lindsay,
Sorry for my ignorance, but seeing that you were trying to locate the
thread using PID, I think perhaps it's wrong. I have the same
experience identifying such a CPU utilization issue on a Debian box
using a 2.6.x version kernel. I cannot recall whether on a 2.4.x
kernal linux box
On 9/21/07, Lindsay Patten [EMAIL PROTECTED] wrote:
[ ...stuff elided...]
If I look at the system status using the Tomcat manager webapp there are
often requests listed with ridiculously large values in the Time column,
several hundred seconds for jsp pages that only take a fraction of a
From: Lindsay Patten [mailto:[EMAIL PROTECTED]
Subject: 100% cpu usage by VM Thread in tomcat
Expecting to find that I had some error in my webapp I did a
few thread dumps, but assuming that nid in the thread dump
corresponds to pid from ps I found that the process that was
spinning was
Looking at the cpu times, top says that pid 324 has used over 900
minutes of cpu time, none of the other tomcat threads have used more
than 9 minutes. When the system is grinding it is pid 324 that is
listed as 97% of cpu with no other java threads on screen. The problem
may be caused by
From: Lindsay Patten [mailto:[EMAIL PROTECTED]
Subject: Re: 100% cpu usage by VM Thread in tomcat
I need to figure out how to reproduce the situation out of
the production server to see how I can use it...
For an initial check, set -Dcom.sun.management.jmxremote for the Tomcat
startup
