We are seeing an OutOfMemoryErrors with large object allocations with the following JVM settings:

-Xms1024m -Xmx1024m

We are using the following JDK on Windows 2003 Enterprise Server SP1

java version "1.3.1_09"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_09-b03)
Java HotSpot(TM) Client VM (build 1.3.1_09-b03, mixed mode)

The problem seems to happen very randomly and after running 1 to 2 hours of load through the system we start to see OutOfMemoryErrors.

However the problem seems to be not shown (temporarily) if we go with a min heap (-Xms512m) of 512m.

We are trying to debug the problem and looking for some help on tuning some of the JVM settings to see if the problem can be fixed with JVM tuning parameters.

Please note that this is not a memory leak, and it appears to be memory allocation issue while GC is running.