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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15973) PeriodicMemstoreFlusher is causing excessive flushes when back-in-time inserts are happening
Date Mon, 06 Jun 2016 23:35:21 GMT
Enis Soztutar created HBASE-15973:
-------------------------------------

             Summary: PeriodicMemstoreFlusher is causing excessive flushes when back-in-time
inserts are happening
                 Key: HBASE-15973
                 URL: https://issues.apache.org/jira/browse/HBASE-15973
             Project: HBase
          Issue Type: Bug
            Reporter: Enis Soztutar
             Fix For: 2.0.0, 1.3.0, 1.4.0


In a production cluster, we have noticed a case where flushes were happening for 200-400KB
in sizes. Turns out the periodic memstore flusher is force flushing because cells with older
timestamps (in this case days old) were being inserted. 

We have periodic memstore flusher with 1 hour defaulted, so in a case where replication is
lagging, or phoenix secondary index rebuild or the user doing back-in-time inserts with cell
timestamps older than 1 hour, we will flush extremely frequently. 



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