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From Boris Shulman <>
Subject Re: cassandra freezes
Date Thu, 25 Feb 2010 14:09:46 GMT
In these tests I perform only write operations, no reads.

On Thu, Feb 25, 2010 at 4:07 PM, Jonathan Ellis <> wrote:
> 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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