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From Naresh Yadav <>
Subject Re: Cassandra HANGS after some writes
Date Fri, 16 Aug 2013 14:17:17 GMT
just to update everyone, as per expert advices i tried running this on
Linux machine but i still have exact same problem on linux also...even no
difference in performance...I tried with default yaml and heap size of
8GB..Now advise me on cassandra linux optmizations, will try those...


On Wed, Aug 14, 2013 at 10:43 PM, Robert Coli <> wrote:

> On Tue, Aug 13, 2013 at 10:39 PM, Naresh Yadav <>wrote:
>> I made one single change in default cassandra.yaml, just to experiment.
>> native_transport_min_threads: *1*
>> native_transport_max_threads: *1*
>> with max one single thread for native protocol requests i noticed some
>> improvement, earlier with default yaml most of time it was failing after
>> *10K* combinations BUT with this it worked storing *30K* combinations
>> out of 1lakh..
> Most of the time, when your node "fails", it is because Java Garbage
> Collection is failing. This is usually because you are writing faster than
> you can flush to disk and also collect the garbage. Usually people inspect
> the GC logs and/or use something like jconsole to inspect the JMX interface
> of the JVM and the Cassandra metrics exposed there.
> =Rob

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