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From Tupshin Harper <>
Subject Re: Cassandra freezes
Date Wed, 20 Mar 2013 12:32:56 GMT
What is in your Cassandra log right before and after that freeze?

On Mar 20, 2013 8:06 AM, "Joel Samuelsson" <>

> Hello,
> I've been trying to load test a one node cassandra cluster. When I add
> lots of data, the Cassandra node freezes for 4-5 minutes during which
> neither reads nor writes are served.
> During this time, Cassandra takes 100% of a single CPU core.
> My initial thought was that this was Cassandra flushing memtables to the
> disk, however, the disk i/o is very low during this time.
> Any idea what my problem could be?
> I'm running in a virtual environment in which I have no control of drives.
> So commit log and data directory is (probably) on the same drive.
> Best regards,
> Joel Samuelsson

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