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From aaron morton <>
Subject Re: memory estimate for each key in the key cache
Date Tue, 20 Dec 2011 19:14:46 GMT
If you get the sizing wrong there area couple of emergency pressure valves in the config…

Watch for log messages with "Cassandra is now reducing cache sizes to free up memory." in


Aaron Morton
Freelance Developer

On 21/12/2011, at 5:21 AM, Kent Tong wrote:

>>  It is not telling you to multiply your key size by 10-12, it is telling you to
>> multiply the output of the nodetool cfstats reported "key cache size" by 10-12.
> The  "key cache size" reported is actually the number of keys in the key cache. So,
> it is the same thing as suggesting each key takes 10-12 bytes.

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