I'm meeting the dude in Middleton @ 11:00 AM Sat. You still want to go? If so, I can be at your place around 10:00. Jess's coming too.
On Fri, 2006-01-27 at 11:32, Mark Birenbaum wrote: > I had a similar sounding problem (although I experienced it with all > versions of Tomcat). > > (Forgive me if I repeat information you're already familiar with) > > I was running into a concurrent users issue. Tomcat keeps one thread > open for each user > when you have HTTP keep alive enabled. So the system basically can not > handle more than > "maxThreads" users. BUt more interestingly, I found bumping up > maxThreads beyond about 130 > didn't really seem to help (I was noticing this in 5.0, not just 5.5); I > chalked this up to a thread > pooling issue in Tomcat (and keeping hundreds of threads alive didn't > seem reasonable > anyway). > > Instead, I disabled keep alive (*maxKeepAliveRequests*=1), and now I've > got a thousand concurrent > users operating nice and fast. This works well for me, because most of > my users are just > requesting a single xml doc every 20 seconds, so keeping alive a > connection doesn't give me much. > > > I'm thinking you may be in a similar situation. By default, tomcat has > keepalive on. BUt maybe your > old installation had it turned off at some point. > > Andreas Daab wrote: > > Hi, > > > > yesterday I switched our web app from Tomcat 5.0.28 with Java 1.4.2 to > > Tomcat 5.5.12 with Java 1.5. We have two applications, each with 250 > > users. Tomcat 5.0.28 is a little slow, but has no problem to handle 500 > > users. With Tomcat 5.5.12/JVM 1.5 the limit is 100 - 130 users. Any > > additional user gets an error. Even tomcat manager doesn't work anymore. > > Both Tomcat versions share the same configuration: > > > > connectionTimeout="20000" > > compression="on" > > maxThreads="150" > > minSpareThreads="25" > > maxSpareThreads="75" > > > > JvmMx = 1536 > > > > With more maxThreads (250, 450, 500) Tomcat has the same problem. > > Avarage used threads is 20. Tomcat eats 15 - 25% cpu, it's not the > > limit. We have 4 GB RAM and 4 Xeon-HAT, should be enough for 500 users. > > The server runs under Windows 2003 Enterprise. > > I (temporarily) switched back to 5.0.28. How to get Tomcat 5.5.12 > > working? > > > > Tanks in advance > > > > Andreas > > > > --------------------------------------------------------------------- > > 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] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
