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From "Phabricator (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4542) add filter info to slow query logging
Date Tue, 31 Jan 2012 21:33:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197294#comment-13197294
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Phabricator commented on HBASE-4542:
------------------------------------

zhiqiu has commented on the revision "[jira] [HBASE-4542] Add filter info to slow query logging".

  @mbautin Sure! Should I fill in "Affects Version/s", "Release Notes" or other fields in
the Submit Patch form?

REVISION DETAIL
  https://reviews.facebook.net/D1539

                
> add filter info to slow query logging
> -------------------------------------
>
>                 Key: HBASE-4542
>                 URL: https://issues.apache.org/jira/browse/HBASE-4542
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Kannan Muthukkaruppan
>            Assignee: Madhuwanti Vaidya
>         Attachments: D1263.2.patch, D1539.1.patch
>
>
> Slow query log doesn't report filters in effect.
> For example:
> {code}
> (operationTooSlow): \
> {"processingtimems":3468,"client":"10.138.43.206:40035","timeRange": [0,9223372036854775807],\
> "starttimems":1317772005821,"responsesize":42411, \
> "class":"HRegionServer","table":"myTable","families":{"CF1":"ALL"]},\
> "row":"6c3b8efa132f0219b7621ed1e5c8c70b","queuetimems":0,\
> "method":"get","totalColumns":1,"maxVersions":1,"storeLimit":-1}
> {code}
> the above would suggest that all columns of myTable:CF1 are being requested for the given
row. But in reality there could be filters in effect (such as ColumnPrefixFilter, ColumnRangeFilter,
TimestampsFilter() etc.). We should enhance the slow query log to capture & report this
information.

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