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https://issues.apache.org/jira/browse/HBASE-17057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashu Pachauri updated HBASE-17057:
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Description:
Long compactions currently drop cache behind reads/writes so that they don't
pollute the page cache but short compactions don't do that. The bulk of the
data is actually read during minor compactions instead of major compactions,
and thrashes the page cache since it's mostly not needed.
We should drop page cache behind minor compactions too.
was:
Long compactions currently drop cache behind reads so that they don't pollute
the page cache but short compactions don't do that. The bulk of the data is
actually read during minor compactions instead of major compactions, and
thrashes the page cache since it's mostly not needed.
We should drop page cache behind reads for minor compactions too.
> Minor compactions should also drop page cache behind reads
> ----------------------------------------------------------
>
> Key: HBASE-17057
> URL: https://issues.apache.org/jira/browse/HBASE-17057
> Project: HBase
> Issue Type: Improvement
> Components: Compaction
> Reporter: Ashu Pachauri
> Assignee: Ashu Pachauri
>
> Long compactions currently drop cache behind reads/writes so that they don't
> pollute the page cache but short compactions don't do that. The bulk of the
> data is actually read during minor compactions instead of major compactions,
> and thrashes the page cache since it's mostly not needed.
> We should drop page cache behind minor compactions too.
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