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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (OAK-3819) Collect and expose statistics related to Segment FileStore operations
Date Fri, 08 Jan 2016 10:43:39 GMT

    [ https://issues.apache.org/jira/browse/OAK-3819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15089043#comment-15089043

Michael Dürig commented on OAK-3819:

Not sure whether this is supported (yet) by {{Stats}} but we could collect those numbers by
sampling with a fixed resolution timer. This would give us asymptotically exact numbers for
the accumulated time spent reading segments. 

> Collect and expose statistics related to Segment FileStore operations
> ---------------------------------------------------------------------
>                 Key: OAK-3819
>                 URL: https://issues.apache.org/jira/browse/OAK-3819
>             Project: Jackrabbit Oak
>          Issue Type: New Feature
>          Components: segmentmk
>            Reporter: Chetan Mehrotra
>            Assignee: Chetan Mehrotra
>             Fix For: 1.3.14
>         Attachments: OAK-3819-v1.patch, OAK-3819-v2.patch, segment-writes.png
> It would be useful to collect some more stats around FileStore operations in SegmentMK
> * Writes per second - How many bytes are being written measured per second
> * Repository size time series - There is a time series in {{GCMonitorMBean}} but that
looks like get updated upon GC and hence bit stale

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