Jonathan Ellis created CASSANDRA-5497:
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Summary: Use allocator information to improve memtable memory
usage estimate
Key: CASSANDRA-5497
URL: https://issues.apache.org/jira/browse/CASSANDRA-5497
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 1.0.0
Reporter: Jonathan Ellis
Assignee: Jonathan Ellis
Priority: Minor
Fix For: 1.1.12
A user reported that Cassandra's estimate of memtable space used was off by a
factor of between 3 and 10 for his counter columnfamilies.
We may or may not be able to fix the counter estimate (counter merging is a
cranky best, and unlike normal merging can involve allocating new objects), but
we can definitely use the SlabAllocator information to cap the error in our
estimate at a fairly low amount.
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