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Joe, I don't think it is all the JVM, the difference is in the operating system. The CPU speed and cache, disk cache, and memory affinity tuning of a single workload are probably the biggest part of the improvement. This isn't such a big deal with real-life mixed workloads. Here is a link for you to look at: http://www-1.ibm.com/servers/eserver/iseries/perfmgmt/pdf/memaffin.pdf David Morris >>> joepluta@xxxxxxxxxxxxxxxxx 1/24/2005 7:16:02 AM >>> > From: Urbanek, Marty > > Please clarify: are you saying there is a multi-fold (8X) increase in > performance between the iSeries 1.4.1 and 1.4.2 JVM running on the same > machine? I'm not saying ANYTHING definitively, Marty. I'm just saying what the numbers said. The 24-way model 840-2420 scored about 80,000 on JDK 1.3.0, while the 32-core (which I assume is 16 2-core CPUs) i5 595 scored 880,000 on JDK 1.4.2. What exactly does this mean? I don't know, but it's a damned curious number, don't you think?...
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