Found the issue. I just needed a for cicle with millions of loops.
There was only kernel calls that saturated CPU till 45-50%. A resource was waiting something. Don't know if it was the HDD or the network. I have to check. Thanks for the tip, Peter :) Peter Crowther wrote: > >> From: Steve G.B. [mailto:[EMAIL PROTECTED] >> I've created a VM with 4 VCores, and all of the cores are >> allocated to the VM. > > OK, so 50% CPU = 2 cores maxed out. Out of interest, is it 25% with only > one Tomcat started? > >> I'm using Sun JVM 1.6, and stressing the Guest with >> Loadrunner on another >> machine (if you ask: this machine with loadrunner isn't the >> bottleneck) >> >> No Databases, no I/O requests, no Network saturation. > > OK. > > Given that you're getting exactly 50% CPU use (it *is* exact, right?) that > indicates the test harness is very unlikely to be the problem. It would > almost certainly bottleneck at some other CPU value. > >> that's why I think it's the JVM. >> For my tests I used the standard demo webapp in Loarunner >> (Mercury Tours), >> and a couple of stupid jsp pages. So Apache and Tomcat both. > > I'll highlight that to the folks who know the demo app better: does it run > properly under load? I'd assume so... > >> Fun thing is that when using Tomcat and Apache combined, I >> can get an 80-85% CPU Utilization. > > Yes. If you've got httpd passing everything through it as well, you'll > increase the CPU load - that's expected! > >> Problem is that for my tests I need >> something more simple and the same server. > > Yes. Why add complexity when it's not required? :-) > >> How do you saturate an 8-core host? > > With some reasonably complex code in the JSPs :-). Out of interest, if > your JSPs call something that loops a couple of million times before > returning, what happens to the CPU use? > > - Peter > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Installing-Multiple-Instances-on-Windows-Server-2003-tp19267576p19284452.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
