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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4542) add filter info to slow query logging
Date Mon, 12 Mar 2012 22:22:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227991#comment-13227991
] 

Lars Hofhansl commented on HBASE-4542:
--------------------------------------

Please... Do not mark an issue as fixed if it is targeted to multiple versions but not all
versions are committed. Pretty please? :)
                
> add filter info to slow query logging
> -------------------------------------
>
>                 Key: HBASE-4542
>                 URL: https://issues.apache.org/jira/browse/HBASE-4542
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.89.20100924
>            Reporter: Kannan Muthukkaruppan
>            Assignee: Madhuwanti Vaidya
>             Fix For: 0.94.0, 0.96.0
>
>         Attachments: 0001-jira-HBASE-4542-Add-filter-info-to-slow-query-loggin.patch,
Add-filter-info-to-slow-query-logging-2012-03-06_14_28_13.patch, 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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