This is the key cache entry https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/cache/KeyCacheKey.java
Note that the Descriptor is re-used. If you want to see key cache metrics, including bytes used, use nodetool info. Cheers ----------------- Aaron Morton Freelance Cassandra Developer New Zealand @aaronmorton http://www.thelastpickle.com On 22/02/2013, at 3:45 AM, Kanwar Sangha <kan...@mavenir.com> wrote: > Hi – What is the approximate overhead of the key cache ? Say each key is 50 > bytes. What would be the overhead for this key in the key cache ? > > Thanks, > Kanwar