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From Jonathan Ellis <>
Subject Re: setcachecapacity is forgotten
Date Mon, 24 May 2010 15:00:19 GMT
fixed for 0.6.2 in

On Mon, May 24, 2010 at 7:14 AM, Ran Tavory <> wrote:
> I use nodetool to set cache capacity on a certain node but the settings are
> "forgotten" after a few minutes.
> I run:
> $ nodetool -h localhost -p 9004 setcachecapacity outbrain_kvdb KvImpressions
> 10000000 1000000
> And then run nodetool cfstats immediately after and the settings are
> effective, I see the correct cache settings.
> However, after a few minutes, and I'm not sure what the trigger really is,
> the settings are forgotten and the host returns to the cache settings it had
> read when it was booted.
> I even updated storage-config,xml thinking maybe the server re-reads the
> value from the actual file, but as it seems, it looks like it's reading
> values stored in its memory when booted.
> Of course I can just restart the server so values from the file will take
> effect, but I don't want to start with a cold cache again, I want to
> increase cache size while it's hot.
> ...or am I using the tool incorrectly?
> I'm setting the cache capacity for only one host in the ring, not all hosts.
> Thanks

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support

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