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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2013/08/20 17:44:52 UTC

[jira] [Created] (CASSANDRA-5906) Avoid allocating over-large bloom filters

Jonathan Ellis created CASSANDRA-5906:
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             Summary: Avoid allocating over-large bloom filters
                 Key: CASSANDRA-5906
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5906
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Jonathan Ellis
            Assignee: Yuki Morishita
            Priority: Minor
             Fix For: 2.0.1


We conservatively estimate the number of partitions post-compaction to be the total number of partitions pre-compaction.  That is, we assume the worst-case scenario of no partition overlap at all.

This can result in substantial memory wasted in sstables resulting from highly overlapping compactions.

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