Jean-Daniel Cryans created HBASE-6647:
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Summary: [performance regression] appendNoSync/HBASE-4528 doesn't
take deferred log flush into account
Key: HBASE-6647
URL: https://issues.apache.org/jira/browse/HBASE-6647
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.0
Reporter: Jean-Daniel Cryans
Fix For: 0.96.0, 0.94.2
Since we upgraded to 0.94.1 from 0.92 I saw that our ICVs are about twice as
slow as they were. jstack'ing I saw that most of the time we are waiting on
sync()... but those tables have deferred log flush turned on so they shouldn't
even be calling it.
HTD.isDeferredLogFlush is currently only called in the append() methods which
are pretty much not in use anymore.
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