Benedict created CASSANDRA-6838:
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Summary: FileCacheService dramatically overcounting its memoryUsage
Key: CASSANDRA-6838
URL: https://issues.apache.org/jira/browse/CASSANDRA-6838
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: Benedict
Assignee: Benedict
Fix For: 2.1 beta2
On investigating why I was seeing dramatically worse performance for counter
updates over prepared CQL3 statements compred to unprepared CQL2 statements, I
stumbled upon a bug in FileCacheService wherein, on returning a cached reader
back to the pool, its memory is counted again towards the total memory usage,
but is not matched by a decrement when checked out. So we effectively are
probably not caching readers most of the time.
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