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Posted to issues@lucene.apache.org by "David Smiley (Jira)" <ji...@apache.org> on 2021/01/27 19:28:00 UTC

[jira] [Commented] (SOLR-9854) Collect metrics for index merges and index store IO

    [ https://issues.apache.org/jira/browse/SOLR-9854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17273108#comment-17273108 ] 

David Smiley commented on SOLR-9854:
------------------------------------

I'm looking at SolrIndexWriter, and seeing various fields of type AtomicInteger.  My understanding of Solr's metrics is that we should avoid that in lieu of {{SolrMetricContext.counter(...)}}.  The latter has the advantage of possibly being aggregatable to a node (a separate work item) or disable-able.  Why was it done this way [~ab]?

> Collect metrics for index merges and index store IO
> ---------------------------------------------------
>
>                 Key: SOLR-9854
>                 URL: https://issues.apache.org/jira/browse/SOLR-9854
>             Project: Solr
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 6.4, 7.0
>            Reporter: Andrzej Bialecki
>            Assignee: Andrzej Bialecki
>            Priority: Minor
>             Fix For: 6.4, 7.0
>
>         Attachments: SOLR-9854.patch, SOLR-9854.patch
>
>
> Using API for metrics management developed in SOLR-4735 we should also start collecting metrics for major aspects of {{IndexWriter}} operation, such as read / write IO rates, number of minor and major merges and IO during these operations, etc.
> This will provide a better insight into resource consumption and load at the IO level.



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