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From Alain RODRIGUEZ <>
Subject Re: How does a healthy node look like?
Date Thu, 02 May 2013 07:12:49 GMT
Well, maybe should you describe us your hardware and the C* release toi are
using. Also give us some metrics.
Le 30 avr. 2013 18:48, "Steppacher Ralf" <> a écrit :

>  Hi,
> I have troubles finding some quantitative information as to how a healthy
> Cassandra node should look like (CPU usage, number of flushes,SSTables,
> compactions, GC), given a certain hardware spec and read/write load. I have
> troubles gauging our first and only Cassandra node, whether it needs tuning
> or is simply overloaded.
> If anyone could point me to some data that would be very helpful.
> (So far I have run the node with the default settings in cassandra.yaml
> and cassandra-env. The log claims that the server is occasionally under
> memory pressure and I get frequent timeouts for writes.  I see what I think
> are many flushes, compactions and GCs in the log. Some toying with heap and
> new gen sizes, key cache, and the compaction throughput settings did not
> improve the overall situation much.)
> Thanks!
> Ralf

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