G1GC Full GCs

Todd Lipcon todd at cloudera.com
Wed Jul 7 00:49:49 PDT 2010

> It would
>> be instructive to see what the comparable CMS logs look like.
>> May be then you could start with the same heap shapes for the
>> two and see if you can get to the bottom of the full gc (which
>> as i understand you get to more quickly w/G1 than you did
>> w/CMS).
> Yep, I'll kick off some CMS tests this evening and get back to you with
> those logs.
The CMS logs are up at:


The actual application activity starts at 00:15:50 or so - this is when I
started up the benchmark clients. Before that, the process was essentially
idle. If it would be helpful to rerun with more verbose options like
tenuring output, I can do so. Also happy to provide heap dumps - this is
just a benchmark with artificial data.


Todd Lipcon
Software Engineer, Cloudera
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