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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15519) Add per-user metrics
Date Tue, 22 Mar 2016 20:46:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15207259#comment-15207259

Enis Soztutar commented on HBASE-15519:

bq. We should make sure that we never add that back. We got a 20% improvement by removing
map lookups in the metrics path.
Agreed that we should be careful in the perf analysis to make sure that hot code paths are
not affected. Some overhead was due to long string concatenations for coming up with the metric
name I think. We also check the quotas per-operation, so something to check. 

> Add per-user metrics 
> ---------------------
>                 Key: HBASE-15519
>                 URL: https://issues.apache.org/jira/browse/HBASE-15519
>             Project: HBase
>          Issue Type: Sub-task
>          Components: metrics
>            Reporter: Enis Soztutar
> Per-user metrics will be useful in multi-tenant cases where we can emit number of requests,
operations, num RPCs etc at the per-user aggregate level per regionserver. We currently have
throttles per user, but no way to monitor resource usage per-user. 
> Looking at these metrics, operators can adjust throttles, do capacity planning, etc per-user.

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