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Posted to issues@hbase.apache.org by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org> on 2013/05/08 00:49:15 UTC
[jira] [Resolved] (HBASE-2883) Req/sec in web UIs are way off when
regions are moving
[ https://issues.apache.org/jira/browse/HBASE-2883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Daniel Cryans resolved HBASE-2883.
---------------------------------------
Resolution: Invalid
Old issue, let's open a new one if someone still sees this as a problem.
> Req/sec in web UIs are way off when regions are moving
> ------------------------------------------------------
>
> Key: HBASE-2883
> URL: https://issues.apache.org/jira/browse/HBASE-2883
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.20.5, 0.89.20100621
> Reporter: Jean-Daniel Cryans
> Priority: Minor
>
> Now that the region servers can heartbeat back to the master as soon as they have a message (region open, close, etc), they also recompute their metrics. I see two problems:
> - The metrics are recomputed way too often, and by the looks of that code it seems quite intense.
> - Our UIs are expecting that the value returned by the metrics computation is per second, but when regions are moving a RS can ping back a few times within a single second. This gives a very wrong view of the load.
> I think it's time we move metrics computation in it's own separate thread.
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