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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19035) Miss metrics when coprocessor use region scanner to read data
Date Sun, 05 Nov 2017 09:42:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16239468#comment-16239468
] 

Anoop Sam John commented on HBASE-19035:
----------------------------------------

What updation of writeRequestsCount when HRegion#batchMutate()?   
What abt HRegion append/increment/checkAndXXX ops?

> Miss metrics when coprocessor use region scanner to read data
> -------------------------------------------------------------
>
>                 Key: HBASE-19035
>                 URL: https://issues.apache.org/jira/browse/HBASE-19035
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Guanghao Zhang
>            Assignee: Guanghao Zhang
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19035.master.001.patch, HBASE-19035.master.002.patch
>
>
> Region interface is exposed to coprocessor. So coprocessor use getScanner to get a region
scanner to read data. But the scan metrics was only updated in region server level. So we
will miss some scan metrics for the read from coprocessor.
> || Region Operation || When to update requests metric ||
> | get | update read metric in nextRaw() |
> | put | update write metric in batchMutate() |
> | delete | update write metric in batchMutate() |
> | increment | update read metric by get() and  update write metric in doDelta() |
> | append | update read metric by get() and  update write metric in doDelta() |
> | mutateRow | update write metric in processRowsWithLocks() |
> | mutateRowsWithLocks | update write metric in processRowsWithLocks() |
> | batchMutate | update write metric in batchMutate() |
> | checkAndMutate | update read metric by get() and  update write metric by mutateRow()
|
> | checkAndRowMutate | update read metric by get() and  update write metric by doBatchMutate()
|
> | processRowsWithLocks | update write metric in processRowsWithLocks() |
> Meanwhile, remove requestRowActionCount in RSRpcServices. This metric can be computed
by region's readRequestsCount and writeRequestsCount.



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