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Posted to issues@hbase.apache.org by "Nicolas Spiegelberg (JIRA)" <ji...@apache.org> on 2012/04/30 19:59:50 UTC

[jira] [Commented] (HBASE-5895) Slow query log in trunk is too verbose

    [ https://issues.apache.org/jira/browse/HBASE-5895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13265060#comment-13265060 ] 

Nicolas Spiegelberg commented on HBASE-5895:
--------------------------------------------

It should at least be optional to enable verbose logging.  Another thought was rate limiting the number of times a region could log a slow query over a given time (to rate limit logging disk IO/sec)
                
> Slow query log in trunk is too verbose
> --------------------------------------
>
>                 Key: HBASE-5895
>                 URL: https://issues.apache.org/jira/browse/HBASE-5895
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.96.0
>            Reporter: Todd Lipcon
>            Priority: Critical
>
> Running a YCSB workload against trunk, the slow query log ends up logging the entire contents of "mutate" RPCs (in PB-encoded binary). This then makes the logging back up, which makes more slow queries, which makes the whole thing spin out of control. We should only summarize the RPC, rather than printing the whole contents.

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