so the old generation in your Java Heap hasn't any free memory anymore under load
and does a lot of Full Garbage Collections which lead to "Stop-the-world" behaviour.
Use the following Java Options to increase the Java Heap (example with 256 MB): -Xmx256m -Xms256m (setting maximum (Xmx) and initial (Xms) heapsize to same size is recommended)
Use the following Java options to have GC/Heap logging (goes to catalina.out): -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC
For more Details on Garbage Collection see: http://java.sun.com/docs/hotspot/gc1.4.2/ http://wireless.java.sun.com/midp/articles/garbagecollection2/
At 09:15 23.07.2003 +0100, you wrote:
Tomcat slows then eventually stops serving jsps under load (100+ concurrent users), html is always fine. The behaviour is sporadic and not easily reproducable but only occurs under load.
Standalone (Coyote) 1.1.24, J2SDK1.4.1_03, Linux RH9.
Anyone else experiencing this?
Thanks Euan
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