On Jul 21, 2:57 pm, Eugene Kononov <[email protected]> wrote:
> > I'm experimenting with a 6 core, 8GB Windows Server 2008 machine with
> > 64-Bit Java.
>
> > I've configured JBT to run with the flags: -d64 -Xms7g -Xmx7g
>
> > Is this sufficient to get some decent performance on this hardware for
> > optimising? JBT seemed to only ever get up to about 4GBs of RAM, and
> > even though all 6 cores were pegged at 100%, it still seemed to go
> > slower than I would have expected.
>
> > Does anyone suggest a better configuration?
>
> From my experimentation, I determined that -XX:+AggressiveHeap gives me the
> best throughput. If you specify your optimization job, I can run it on my
> machine and compare with your timing results to see if you missed anything.
Provided you have more than 1 CPU, I found that these command line
options help throughput immensely
-XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -Xincgc
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