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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 Mon, 02 Apr 2018 10:15:00 GMT

    [ https://issues.apache.org/jira/browse/OAK-7384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16422092#comment-16422092
] 

Andrei Dulceanu commented on OAK-7384:
--------------------------------------

The attached patch includes all changes for accommodating the changes in the description.

[~mduerig], could you take a look at it, please?

> 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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