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https://issues.apache.org/jira/browse/CASSANDRA-5906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13824180#comment-13824180
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Yuki Morishita commented on CASSANDRA-5906:
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Push this to be released on 2.1, after CASSANDRA-6356
> 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
> Fix For: 2.1
>
>
> 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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