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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Resolved] (CASSANDRA-4619) Make non-heap memory usable for key cache
Date Wed, 05 Sep 2012 13:33:08 GMT


Jonathan Ellis resolved CASSANDRA-4619.

    Resolution: Won't Fix

The (on-heap) overhead of keeping key cache entries off-heap would be roughly equivalent to
the cache entry itself.

Don't worry, Cassandra gets plenty of benefit from the OS page cache even if you are not using
row cache.
> Make non-heap memory usable for key cache
> -----------------------------------------
>                 Key: CASSANDRA-4619
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: kalyan
>            Priority: Minor
> There might be use cases where row cache is not useful because of the data use case patterns
( too big a data wherein each is row is less frequently looked up). Hence a mechanism is needed
to reuse the available non-heap memory on the node to use for key cache. 

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