Re: Cassndra 1.0.6 GC query

2012-02-27 Thread Ben Coverston
Heap dump is really the gold standard for analysis, but if you don't want to take a heap dump for some reason: 1. Decrease the cache sizes 2. Increase the index interval size These in combination may reduce pressure on the heap enough so you do not see these warnings in the log. On Mon, Feb 27,

Re: Cassndra 1.0.6 GC query

2012-02-27 Thread Roshan
As a configuration issue, I haven't enable the heap dump directory. Is there another way to find the cause to this and identify possible configuration changes? Thanks. -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Cassndra-1-0-6-GC-query-tp73

Re: Cassndra 1.0.6 GC query

2012-02-27 Thread Jonathan Ellis
Take a heap dump (there should be one from when you OOMed) and see what is consuming your memory. On Mon, Feb 27, 2012 at 3:45 PM, Roshan wrote: > Hi Experts > > After getting an OOM error in production, I reduce the > -XX:CMSInitiatingOccupancyFraction to .45 (from .75) and > flush_largest_memta

Cassndra 1.0.6 GC query

2012-02-27 Thread Roshan
Hi Experts After getting an OOM error in production, I reduce the -XX:CMSInitiatingOccupancyFraction to .45 (from .75) and flush_largest_memtables_at to .45 (from .75). But still I am get an warning message in production for the same Cassandra node regarding OOM. Also reduce the concurrent compact