Enis Soztutar created HBASE-15973:
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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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