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From "Andrei Dulceanu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-7384) SegmentNodeStoreStats should expose stats for previous minute per thread group
Date Wed, 04 Apr 2018 11:25:00 GMT

    [ https://issues.apache.org/jira/browse/OAK-7384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425357#comment-16425357

Andrei Dulceanu commented on OAK-7384:

Thanks for reviewing the initial patch, [~mduerig]! I included the changes you suggested at
[0] to track/compare them easier. Could you take another look, please?

[0] https://github.com/dulceanu/jackrabbit-oak/tree/issues/OAK-7384

> SegmentNodeStoreStats should expose stats for previous minute per thread group
> ------------------------------------------------------------------------------
>                 Key: OAK-7384
>                 URL: https://issues.apache.org/jira/browse/OAK-7384
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Andrei Dulceanu
>            Assignee: Andrei Dulceanu
>            Priority: Minor
>              Labels: tooling
>             Fix For: 1.9.0, 1.10
>         Attachments: OAK-7384.patch
> The current "CommitsCountPerWriter" stats exposed by {{SegmentNodeStoreStats}} are hard
to follow since there can be too many writers at a time. To improve this, a more coarse-grained
version of this metric should be added, in which commits are recorded for groups of threads.
The groups should be configurable and represent regexes to be matched by individual thread
names. An additional group (i.e. "other") will group all threads not matching any of the defined
group regexes. 
> The current behaviour will be split in two:
> * "CommitsCountOtherThreads" will expose a snapshot of threads currently in "other" group
> * "CommitsCountPerGroup" will expose an aggregate of commits count per thread group for
the previous minute.
> Both metrics will be reset each minute.

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