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From Jonathan Ellis <>
Subject Re: cassandra freezes
Date Thu, 25 Feb 2010 14:07:31 GMT
The only kind of "freeze" that makes sense there is your reads are i/o
bound and the extra disk activity is killing you.  In that case the
fix is to add more RAM, or give less to the JVM so the OS can use more
for buffer cache.

On Thu, Feb 25, 2010 at 8:01 AM, Boris Shulman <> wrote:
> In my case the cassandra node freezes while memtable flush operation
> is performed or compactation operation is performed. How can I
> optimize the cassandra configuration in order to avoid this behavior?
> I've tried both using large memtable size (1G) and small (128M) but in
> every case I have some sort of freezes when the data is flushed to the
> disk.
> Please advice.

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