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From "Adam Fuchs (JIRA)" <>
Subject [jira] [Assigned] (ACCUMULO-3300) monitor ingest, query, etc. rates are too smooth
Date Wed, 05 Nov 2014 16:16:34 GMT


Adam Fuchs reassigned ACCUMULO-3300:

    Assignee: Adam Fuchs

> monitor ingest, query, etc. rates are too smooth
> ------------------------------------------------
>                 Key: ACCUMULO-3300
>                 URL:
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: monitor, tserver
>            Reporter: Adam Fuchs
>            Assignee: Adam Fuchs
>             Fix For: 1.7.0
>         Attachments: monitor_smoothing.patch, smoothed_0.2.png, smoothed_0.95.png
> We use an exponential decay function to smooth performance monitoring. This dates back
to the early days of the project when we were taking samples frequently and everything looked
like noise. Now our performance is a bit more steady and we take samples about every 5 seconds.
I think we need to update some parameters so that finer-grained performance characteristics
show up in the monitor. This is critical for the next wave of Accumulo performance improvements.

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