If you get the sizing wrong there area couple of emergency pressure valves in the config… https://github.com/apache/cassandra/blob/trunk/conf/cassandra.yaml#L113
Watch for log messages with "Cassandra is now reducing cache sizes to free up memory." in them. Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com 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.
