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From "Matt Abrams (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5906) Avoid allocating over-large bloom filters
Date Mon, 25 Nov 2013 02:17:36 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13831146#comment-13831146
] 

Matt Abrams commented on CASSANDRA-5906:
----------------------------------------

Link to bug I mentioned in previous comment:

https://github.com/addthis/stream-lib/commit/5a9e9cc7f71e1eb49635df29bba67d905903f1b8

> 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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