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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10129) support real time rpc invoke latency percentile statistics for methods of HRegionInterface
Date Wed, 11 Dec 2013 17:43:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845570#comment-13845570
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Elliott Clark commented on HBASE-10129:
---------------------------------------

Most of this is already done in trunk (The most important HRegion have metrics).  I would
be wary of this.  The old 0.94 metrics system is pretty prone to slow downs when adding metrics,
and it looks like these will be hit a lot.  How much does this change the performance of HBase
?

> support real time rpc invoke latency percentile statistics for methods of HRegionInterface

> -------------------------------------------------------------------------------------------
>
>                 Key: HBASE-10129
>                 URL: https://issues.apache.org/jira/browse/HBASE-10129
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 0.94.14
>            Reporter: cuijianwei
>         Attachments: HBASE-10129-0.94-v1.patch
>
>
> It is important for applications to get latency statistics when invoking hbase apis.
Currently, the average latency of methods in HRegionInterface will be computed in HBaseRpcMetrics.
However, user might expect more detail latency statistics, such as 75% percentile latency,
95% percentile latency, etc. Therefore, will it be useful if we computing latency percentiles
for rpc invoking of region server methods? 



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