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From Patrik Modesto <>
Subject Re: OOM during batch_mutate
Date Mon, 07 Feb 2011 15:00:08 GMT
On Mon, Feb 7, 2011 at 15:44, sridhar basam <> wrote:
> Looks like you don't have a big enough working set from your GC logs, there
> doesn't seem to be a lot being reclaimed in the GC process. The process is
> reclaiming a few hundred MB and is running every few seconds. How big are
> your caches? The probable reason that it works the first couple times when
> you create it due to nothing being in cache as it gets built up.

Hi Sridhar,

thanks for your answer. I didn't set the cache to any specific value,
I use the defaults:

[default@Foo] show keyspaces;
Keyspace: Foo:
  Replication Strategy: org.apache.cassandra.locator.SimpleStrategy
    Replication Factor: 1
  Column Families:
    ColumnFamily: Url
      Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type
      Row cache size / save period: 0.0/0
      Key cache size / save period: 200000.0/3600
      Memtable thresholds: 4.6640625/995/60
      GC grace seconds: 864000
      Compaction min/max thresholds: 4/32
      Read repair chance: 1.0
      Built indexes: []

My row-key is 16bytes long string, so I don't expect the cache would
be a problem.


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