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From "Ian Boston (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-4726) Add Metrics coverage to the Lucene Indexer
Date Thu, 01 Sep 2016 10:05:20 GMT

    [ https://issues.apache.org/jira/browse/OAK-4726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15454970#comment-15454970
] 

Ian Boston commented on OAK-4726:
---------------------------------

For existing instances, there is a config to instrument the same methods as the patch instruments
using Sling metrics at https://github.com/ieb/slingmetrics/blob/master/config/metrics_indexing.yaml.
This wont generate one metric set per index, as the patch does, but will allow earlier versions
of Oak, with the same class/method names to generate metrics on their indexing behaviour.
See the README.md in that repo to see how to use Sling Metrics.

> Add Metrics coverage to the Lucene Indexer
> ------------------------------------------
>
>                 Key: OAK-4726
>                 URL: https://issues.apache.org/jira/browse/OAK-4726
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: lucene
>    Affects Versions: 1.5.8
>            Reporter: Ian Boston
>
> Although there are some stats surrounding the Lucene indexing processes it would be useful
to have metrics style stats available. 
> Looking at the code, the implementations IndexWriter look like the right place to add
the metrics. These could be global aggregate metrics, ie one set of metrics covering all IndexWriter
implementations, or there could be individual metrics for each Lucene index definition. The
latter would be more useful as it will allow detailed stats on individual metrics. 
> These metrics will only give information on the writer operations, and not any Tokenizing
operations. 
> Patch in the form of a pull request will flow.



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