outOfMemory with HotSpot/Solaris but runs fine with JRockit/SuSE
I have an application that periodically runs out of memory on a large Solaris server with HotSpot, but runs fine on a smaller server with JRockit. We want to move to the large Solaris server but need to resolve the out of memory issue first.
DETAILS
This application receives about 1 Mbit per second peak input from two data sources via tcp. The out of memory does not correlate with peak load. The server is an HP Galaxy with 4 AMD cpus and 16 Gig of memory. The JVM is Hotspot 1.5_09. The application is using 300 to 500 Mbytes of memory according to top. We start it with the -Xms250m argument.
uname -a = Sun OS 5.1
The stable server is a dual cpu SuSE 9.3 with 2 Gig of memory running JRockit 1.5_09.
Neither machine shows significant cpu load.
Sporadically (not discernable pattern), the application throws an OutOfMemory error.
It could be a bug, but I need some diagnostic info to find it. I'm concerned that the thread receiving input does not have enough memory. When a thread runs on a cpu, is there some limitation on the memory available? Is there some way to track this?
Thanks
