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From "Jason Brown (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-5348) Remove on-heap row cache
Date Wed, 22 May 2013 21:04:20 GMT


Jason Brown commented on CASSANDRA-5348:

tests completed and passed.
> Remove on-heap row cache
> ------------------------
>                 Key: CASSANDRA-5348
>                 URL:
>             Project: Cassandra
>          Issue Type: Task
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 2.0
>         Attachments: 5348.txt
> The row (partition) cache easily does more harm than good.  People expect it to act like
a query cache but it is very different than that, especially for the wide partitions that
are so common in Cassandra data models.
> Making it off-heap by default only helped a little; we still have to deserialize the
partition to the heap to query it.
> Ultimately we can add a better cache based on the ideas in CASSANDRA-1956 or CASSANDRA-2864,
but even if we don't get to that until 2.1, removing the old row cache for 2.0 is a good idea.

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