[CASSANDRA-5348] Remove on-heap row cache

• Type: Task
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0 beta 1
• Assignee: Jonathan Ellis
• Reporter: Jonathan Ellis

Authors

Jonathan Ellis

Reviewers

Jason Brown

• Created: 14/Mar/13 16:46
• Updated: 16/Apr/19 09:32
• Resolved: 22/May/13 21:00

Description

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.

Issue Links

• blocks: CASSANDRA-5357 Query cache / partition head cache