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From "Ashu Pachauri (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17057) Minor compactions should also drop page cache behind reads
Date Wed, 09 Nov 2016 20:23:58 GMT
Ashu Pachauri created HBASE-17057:
-------------------------------------

             Summary: 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


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. 



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