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https://issues.apache.org/jira/browse/HBASE-9775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799681#comment-13799681
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Elliott Clark commented on HBASE-9775:
--------------------------------------
Here's what I'm seeing in the logs.
{code}
13-10-18 17:14:02,641 WARN [RpcServer.responder] ipc.RpcServer: Exception
while changing ops : java.nio.channels.CancelledKeyException
2013-10-18 17:14:02,642 WARN [RpcServer.handler=3,port=60020] ipc.RpcServer:
(responseTooSlow):
{"processingtimems":13904,"call":"Multi(org.apache.hadoop.hbase.protobuf.generated.ClientProtos$MultiRequest)","client":"10.20.130.107:39862","starttimems":1382141628563,"queuetimems":30966,"class":"HRegionServer","responsesize":3330303,"method":"Multi"}
2013-10-18 17:14:03,576 INFO [Thread-14] regionserver.HStore: Added
hdfs://e1101.halxg.cloudera.com:8020/hbase/data/default/IntegrationTestBigLinkedList/663b4cb3fa350cd61c9f3317eb6c577a/meta/dcec7a6ef36e437da110aef12b507d72,
entries=1271646, sequenceid=2223534, filesize=94.8 M
2013-10-18 17:14:03,693 INFO [Thread-14] regionserver.HRegion: Finished
memstore flush of ~262.0 M/274675536, currentsize=0/0 for region
IntegrationTestBigLinkedList,\xB6\x1B\xE0|0+!\xA1\xC0\xB5\x0F\xAB\x85\x9C\xA6\xB0,1382141290187.663b4cb3fa350cd61c9f3317eb6c577a.
in 198100ms, sequenceid=2223534, compaction requested=false
2013-10-18 17:14:03,746 DEBUG [Thread-14] regionserver.HStore: Cannot split
region due to reference files being there
2013-10-18 17:14:03,789 DEBUG [Thread-14] regionserver.HRegion: Started
memstore flush for
IntegrationTestBigLinkedList,\xB4\x1D\xFF\x1A,1382141290187.2845b99ca6c5c8c86f150b1cb17b7063.,
current region memstore size 264.7 M
2013-10-18 17:14:10,220 WARN [RpcServer.handler=20,port=60020] ipc.RpcServer:
(responseTooSlow):
{"processingtimems":10663,"call":"Multi(org.apache.hadoop.hbase.protobuf.generated.ClientProtos$MultiRequest)","client":"10.20.132.117:35031","starttimems":1382141639521,"queuetimems":31152,"class":"HRegionServer","responsesize":1596044,"method":"Multi"}
2013-10-18 17:14:11,777 INFO [JvmPauseMonitor] util.JvmPauseMonitor: Detected
pause in JVM or host machine (eg GC): pause of approximately 1023ms
GC pool 'ParNew' had collection(s): count=1 time=1102ms
2013-10-18 17:14:14,620 INFO [JvmPauseMonitor] util.JvmPauseMonitor: Detected
pause in JVM or host machine (eg GC): pause of approximately 1300ms
GC pool 'ParNew' had collection(s): count=1 time=1383ms
{code}
> Client write path perf issues
> -----------------------------
>
> Key: HBASE-9775
> URL: https://issues.apache.org/jira/browse/HBASE-9775
> Project: HBase
> Issue Type: Bug
> Components: Client
> Affects Versions: 0.96.0
> Reporter: Elliott Clark
> Priority: Critical
> Attachments: Charts Search Cloudera Manager - ITBLL.png, Charts
> Search Cloudera Manager.png, hbase-9775.patch, job_run.log, short_ycsb.png,
> ycsb_insert_94_vs_96.png, ycsb.png
>
>
> Testing on larger clusters has not had the desired throughput increases.
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