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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2016/06/05 19:42:59 UTC

[jira] [Commented] (HBASE-15967) Metric for active ipc Readers and make default fraction of cpu count

    [ https://issues.apache.org/jira/browse/HBASE-15967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315997#comment-15315997 ] 

stack commented on HBASE-15967:
-------------------------------

HBASE-2941 added the fixed size Readers whereas, a later, alternative implementation, HBASE-6103 added count of Readers based off CPUs.

> Metric for active ipc Readers and make default fraction of cpu count
> --------------------------------------------------------------------
>
>                 Key: HBASE-15967
>                 URL: https://issues.apache.org/jira/browse/HBASE-15967
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: stack
>            Assignee: stack
>         Attachments: HBASE-15967.master.001.patch
>
>
> Our ipc Readers are hard coded at 10 regardless since . Running w/ less Readers, we go faster..(e.g. 12 Readers has us doing 135k with workloadc and 6 readers has us doing 145k).. .but hard to tell what count of Readers are needed since no metric.
> This issue changes Readers to be 1/4 the installed CPUs or 8, whichever is the minimum, and then adds a new hbase.regionserver.ipc.runningReaders metric so you have a chance seeing whats needed.



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