Giving it more memory will simply increase the time between (and duration of) the freezes. Which JVM are you using? I think that Java 7 has some nice improvements to GC especially with large heaps.
On Mon, Dec 19, 2011 at 7:35 AM, Rene Kochen <rene.koc...@emea.schange.com>wrote: > I recently see the following garbage collect behavior in our performance > tests (the attached chart shows the heap-size in MB):**** > > ** ** > > **** > > ** ** > > During the garbage collections, Cassandra freezes for about ten seconds. I > observe the following log entries:**** > > ** ** > > “GC for ConcurrentMarkSweep: 11597 ms for 1 collections, 1887933144 used; > max is 8550678528”**** > > ** ** > > I use Windows Server 2008 and Cassandra 0.7.10 with min and max heap size > set to 8 GB.**** > > ** ** > > What can I do to make Cassandra not freeze? Just allocate more memory?**** > > ** ** > > Thanks,**** > > > Rene**** > -- --------------------------------------------- Paul Loy p...@keteracel.com http://uk.linkedin.com/in/paulloy
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