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From Peter Schuller <>
Subject Re: Help with Cassandra Row Caches
Date Sat, 12 Nov 2011 20:07:03 GMT
> We set row cache too high, 10000 or so and now all our 6 nodes fail
> with OOM. I believe that high row cache causes OOMs.

If you get into a fallen-and-cant-get-up scenario like this, I suggest
a rolling restart of nodes, and on each node:

(1) shut it down
(2) removed saved caches
(3) start it up
(4) (quickly) use nodetool to decrease the cache sizes *on that particular node*

Once that's done everywhere and everything is stable, a permanent and
cluster-wide change of cache sizes can be done by a schema change as

/ Peter Schuller (@scode,

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