Gregg Willow skrev den 06-05-2008 16:40:
We are at V5R4 and have been using WAS for EGL. We were very slow to begin with at 64 bit. Talking with IBM support it was suggested we throw more memory in and put WAS in its own pool. I think we associated 1GB to the pool. It helped a little but was still a poor performer. It was not until we installed the 32 bit version that it woke up. We have partner company that rewrote a large application in java by seasoned programmers and they have had poor performance as well until they went to 32 bit.
Thank you. Unfortunately the 32-bit JVM is not available for V5R3 (sigh) but I will investigate for those customers who have V5R4 or later.

I found that for CPU-intensive programs - image manipulation - the performance of the two were the same, but apparently the memory footprint is very important to speed on this platform.

It also gives Java 5 which has a lot of benefits programmerwise :)

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