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Posted to dev@hbase.apache.org by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org> on 2013/04/16 00:26:15 UTC

[jira] [Resolved] (HBASE-2500) Block indexes and meta blocks should be put into the LRU

     [ https://issues.apache.org/jira/browse/HBASE-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jean-Daniel Cryans resolved HBASE-2500.
---------------------------------------

    Resolution: Duplicate

This was done as part of the HFileV2 work.
                
> Block indexes and meta blocks should be put into the LRU
> --------------------------------------------------------
>
>                 Key: HBASE-2500
>                 URL: https://issues.apache.org/jira/browse/HBASE-2500
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Jonathan Gray
>            Priority: Minor
>              Labels: moved_from_0_20_5
>
> Currently we are not tracking the heap usage of block indexes.  We're just relying on the fact that we leave a large percentage of total heap as part of "everything else" not in memstores or the block cache.  The "everything else" portion should be left for ephemeral/transient memory usage, not long-lived objects like block indexes.  Introduction of blooms will extend this issue to meta blocks in general.
> All of this should be moved into an LRU.  Either the existing block cache LRU or a new LRU.

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