Ok, Thanks all for the help. I further optimized the environment while troubleshooting. In case anyone else is in a similar issue, I'll list the solution that worked for me--turn off hyperthreading. The two Xeon CPU's are hyperthreaded to represent 4 CPU's on the machine. I'm not sure exactly how tomcat/java interact with this, but it was not favorable. A coworker mentioned that the windows performance monitor often records total CPU utilization incorrectly due to the logical split of the CPU's acting as 4 instead of 2. Disabling the hyperthreading in the system bios shot the CPU utilization up to 70%-90% (I imagine the other 10% of CPU is being reserved by other applications).
Thanks again for the help, Kevin Williams -----Original Message----- From: news [mailto:[EMAIL PROTECTED] On Behalf Of Vic Sent: Thursday, February 03, 2005 9:09 PM To: [email protected] Subject: Re: tomcat CPU utilization pegged...total CPU only 50% [bcc][faked-from][bayes] Importance: Low You could be DB bound or LAN bound. What is the switch telling you LAN utilization is? What is the DB stress test telling you? .V Kevin Williams wrote: >Hello, > > > >I am trying to performance test an application running Tomcat with >Apache w/SSL (connected using mod_proxy). The OS is Windows Server >2003. > > > >The test I am running is simulating a user logging into the application >(using JMeter for the testing framework). Increasing the number of >users from 1, 2, 3, 4,5 the total CPU utilization jumps considerably. >After 5 users the CPU utilization hits 50% for a second and then >drops...When simulating 10 users, the CPU hits50% for a few seconds and >drops back down, the more users, the longer the CPU is pegged at 50%. >My question is why is tomcat only using 50% of the CPU? Seeing the CPU >grow significantly with each user, and then peg out for longer periods >of time with an increased user load indicates that the CPU is the choke >point. Using performance monitor, the Tomcat % Processor Time pegs out >at 100% for the duration that total CPU utilization is at 50%. Is there >a configuration option that I am unaware of to allow tomcat to use more >CPU? > > > >Thanks in advance! > > > >Kevin > > > > -- Forums, Boards, Blogs and News in RiA <http://www.boardVU.com> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
