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https://issues.apache.org/jira/browse/OAK-7904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16752084#comment-16752084
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Thomas Mueller commented on OAK-7904:
-------------------------------------
http://svn.apache.org/r1852102 (trunk)
* For Lucene indexes, the index definition path is used:
QUERY_DURATION_/oak:index/nodetypeLucene.
* For property indexes, just the name: QUERY_DURATION_nodeType.
* For traversing: QUERY_DURATION_traverse is used.
* The methods execute() and next() are measured.
* To avoid performance issues, sampling is used for fast operations (<= 1 ms).
By default, every 256th operation is accounted for, with the time multiplied by
256. (Sampling rate can be changed using the system property
"oak.query.timerSampleRate").
* Each slow operations (> 1 ms) is accounted for.
* The feature can be disabled by setting the system property
"oak.query.timerDisabled".
> Exporting query duration per index metrics with Sling Metrics / DropWizard
> --------------------------------------------------------------------------
>
> Key: OAK-7904
> URL: https://issues.apache.org/jira/browse/OAK-7904
> Project: Jackrabbit Oak
> Issue Type: Task
> Components: indexing, query
> Reporter: Paul Chibulcuteanu
> Assignee: Paul Chibulcuteanu
> Priority: Major
> Fix For: 1.9.10, 1.12
>
> Attachments: OAK-7904.0.patch, OAK-7904.1.patch
>
>
> Purpose of this task is to evaluate & create metric which calculates the
> average duration of query for each index.
> This metric can be later used to evaluate which index(s) need to be optimised.
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