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https://issues.apache.org/jira/browse/HBASE-16832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573644#comment-15573644
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binlijin commented on HBASE-16832:
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When one of our production cluster encounter the meta performance problem, many 
of the getRegionLocation calls timeout. 
First i pick up a regionserver and change hbase.meta.versions=1 and 
hbase.regionserver.metahandler.count=90.
Then restart the regionserver and move meta region to this regionserver, so 
there is only the meta region on this regionserver, then major_compact the meta 
table. 
hbase(main):002:0> major_compact 'hbase:meta'
0 row(s) in 1284.1590 seconds
hbase(main):003:0> 


> Reduce the default number of versions in Meta table for branch-1
> ----------------------------------------------------------------
>
>                 Key: HBASE-16832
>                 URL: https://issues.apache.org/jira/browse/HBASE-16832
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 1.3.0
>            Reporter: binlijin
>            Assignee: binlijin
>         Attachments: rpc-handler.png, rpc_processingCallTime.png, 
> rpc_qps.png, rpc_scan_latency.png, rpc_totalcalltime.png
>
>
> I find the DEFAULT_HBASE_META_VERSIONS is still 10 in branch-1, and in master 
> version DEFAULT_HBASE_META_VERSIONS is 3.



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