Hi, As you say, it's unfortunate you can't reproduce this on a test server. What if you setup a test server and let JMeter pound at it for a few days?
Is there something in your application, e.g. a user action, that would trigger an infinite loop or infinite recursion? That would cause that behavior you've described. And it would only take one user doing it one time, i.e. a very light load, to produce this problem. You'd have to carefully scrutinize your code... Yoav Shapira Millennium Research Informatics >-----Original Message----- >From: Rob Wichterman [mailto:[EMAIL PROTECTED] >Sent: Friday, April 02, 2004 11:17 AM >To: [EMAIL PROTECTED] >Subject: Odd Memory Problem > >I have been battling a memory problem for a few months now with no luck. I >have used profilers and everything else you could imagine. The problem is >we have never been able to duplicate it on the testing servers it only >happens on production which does not see much load at all (100 users a >day). >I noticed something very odd yesterday though. I am using the >"-XX:+UseConcMarkSweepGC and -Xms512m". I was monitoring the garbage >collection activity very closely and I was receiving good performance for 3 >days. I was seeing one garbage collection about every 5 minutes in the >Catalina.out. Then out of nowhere the garbage collection starting going >crazy, about one garbage collection a second, I checked the cpu usage and >it >was stuck around 60% used. There were only 2-4 people logged in at a time. >The crazy garbage collection went on for a couple of hours before it >eventually crapped out with "Out of Memory" errors. It almost seems like a >section of the app caused this sudden outburst but there is no way our QA >department hasn't went over the same section. I was hoping some one seen >or >heard of this before. Below is my environment. > > > >Thanks, > > > >Apache2.0.47 using mod_jk2 > >2 * tomcat4.1.24 > >J2sdk1.4.2_04 This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
