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https://issues.apache.org/jira/browse/CASSANDRA-5497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-5497.
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Resolution: Fixed
committed
> 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
>
> Attachments: 5497.txt, 5497-v2.txt
>
>
> 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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