[jira] [Commented] (SOLR-10262) Collect request latency metrics for histograms

["Andrzej Bialecki (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-10262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15904588#comment-15904588 ] 

Andrzej Bialecki  commented on SOLR-10262:
------------------------------------------

Thanks Otis :) Yes, I'm aware of that implementation and the discussion around it. It's an easy fix to replace the ExponentiallyDecayingReservoir that metrics use by default with HdrHistogram, there's even a pull request against Codahale repo with an implementation.

By "making it possible" did you mean that we make it the new default, but we also allow people to use a different implementation? This would have to be configured early on in {{solr.xml}} or even via system properties, which is a bit ugly.

> Collect request latency metrics for histograms
> ----------------------------------------------
>
>                 Key: SOLR-10262
>                 URL: https://issues.apache.org/jira/browse/SOLR-10262
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: metrics
>            Reporter: Otis Gospodnetic
>
> Since [~ab] is on a role with metrics...
> There is no way to accurately compute request latency percentiles from metrics exposed by Solr today. We should consider making that possible. c.f. https://github.com/HdrHistogram/HdrHistogram



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