Nope not swapping. Based on what we see in jvmstat/visualgc we typically have 64mb of data in old gen, 12mb of app data, and about 12 mb of new gen data. The OS still has free memory as well.
On Thu, 14 Oct 2004 15:54:59 -0400, Cox, Charlie <[EMAIL PROTECTED]> wrote: > Is your machine swapping? 512MB can go quickly... > > > > > -----Original Message----- > > From: Sam Gallant [mailto:[EMAIL PROTECTED] > > Sent: Thursday, October 14, 2004 3:40 PM > > To: Montz, James C. (James Tower) > > Cc: Tomcat Users List > > Subject: Re: Tomcat 5 pause (free gmail account for fix :-) > > > > We have done default gc with 8mb/256mb min/max, default gc with > > 128mb/256mb min/max, and incremental with the same settings. The > > machine has 512mb ram. When we turn on verbose gc the gc logging just > > stops after a period of time both on the sun jvm and the ibm. When > > there is 100% cpu util jsvc is using 99% of the cpu. > > > > > > On Thu, 14 Oct 2004 14:33:13 -0500, Montz, James C. (James Tower) > > <[EMAIL PROTECTED]> wrote: > > > Are you defining any Memory Min/Max (-Xms/-Xmx) constraints on the JVM? > > > Are you collecting any verbose GC information (-verbose:gc)? > > > > > > How much physical memory available on the machine? > > > > > > At times of 100% CPU Utilization, is it java that is consumnig the > > > majority of it? > > > > > > > > > > > > -----Original Message----- > > > From: Sam Gallant [mailto:[EMAIL PROTECTED] > > > Sent: Thursday, October 14, 2004 2:17 PM > > > To: [EMAIL PROTECTED] > > > Subject: Tomcat 5 pause (free gmail account for fix :-) > > > > > > Everyone, > > > Thanks in advance for any help. Also I have a gmail invite for the > > > person who has a fix for this if they are interested. > > > > > > My company has been using Tomcat for several years, but a problem has > > > crept up that we have not been able to solve. Basically, tomcat will > > > stop processing requests for 2-60 second period several times a day. > > > > > > Here is a list of software that we have tried. (Note we have tried > > > changing each key componant to see if we isolate the componant that is > > > the problem, but no luck yet) > > > > > > OS: RedHat 9 & AS3 > > > Threading model: linux threads & nptl > > > JVM: sun 1.4.2_4 & latest ibm > > > Http connector: ajp w/apache 2 and coyote connector > > > JBDC connector 1.0 > > > > > > 1. Doesn't always happen durning old gen garbage collection, but does > > > sometimes > > > 2. Before switching to incremental gc we received out of memory errors > > > which resulted in Tomcat completly hanging > > > 3. After switching to incremental gc the effect changed to 2-60 second > > > periods of time that Tomcat won't process request, but it does resume > > > on its' own. > > > 4. Cpu usage for most of the day is less than 20% utiliztion, but when > > > the problem occurs the cpu spikes to 100% utiliztion briefly. > > > > > > --------------------------------------------------------------------- > > > 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]
