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https://issues.apache.org/jira/browse/HBASE-6647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13445857#comment-13445857
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Hudson commented on HBASE-6647:
-------------------------------
Integrated in HBase-0.94 #445 (See
[https://builds.apache.org/job/HBase-0.94/445/])
HBASE-6321 ReplicationSource dies reading the peer's id
HBASE-6647 [performance regression] appendNoSync/HBASE-4528 doesn't
take deferred log flush into account (Revision 1379290)
Result = FAILURE
jdcryans :
Files :
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/replication/ReplicationZookeeper.java
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSource.java
> [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
> Assignee: Jean-Daniel Cryans
> Fix For: 0.96.0, 0.94.2
>
> Attachments: HBASE-6647-0.94.patch, HBASE-6647-0.94-v2.patch,
> HBASE-6647-0.94-v3.patch, HBASE-6647.pach
>
>
> 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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