[jira] [Commented] (SOLR-1972) Need additional query stats in admin interface - median, 95th and 99th percentile

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[jira] [Commented] (SOLR-1972) Need additional query stats in admin interface - median, 95th and 99th percentile

Markus Jelsma (Jira)

    [ https://issues.apache.org/jira/browse/SOLR-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13252724#comment-13252724 ]

Shawn Heisey commented on SOLR-1972:
------------------------------------

Let's have everyone pretend for a minute that I have a slightly better grasp of Solr/Lucene internals than I actually do.  Perhaps I will one day be able to take what you say and figure out what it means.  I am very interested in having these stats available without patching Solr on my own.

What would be the right way to go about re-implementing this as a module (along with some unit tests) so the code could be committed?

               

> Need additional query stats in admin interface - median, 95th and 99th percentile
> ---------------------------------------------------------------------------------
>
>                 Key: SOLR-1972
>                 URL: https://issues.apache.org/jira/browse/SOLR-1972
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 1.4
>            Reporter: Shawn Heisey
>            Priority: Minor
>         Attachments: SOLR-1972-branch3x-url_pattern.patch, SOLR-1972-url_pattern.patch, SOLR-1972.patch, SOLR-1972.patch, SOLR-1972.patch, SOLR-1972.patch, elyograg-1972-3.2.patch, elyograg-1972-3.2.patch, elyograg-1972-trunk.patch, elyograg-1972-trunk.patch
>
>
> I would like to see more detailed query statistics from the admin GUI.  This is what you can get now:
> requests : 809
> errors : 0
> timeouts : 0
> totalTime : 70053
> avgTimePerRequest : 86.59209
> avgRequestsPerSecond : 0.8148785
> I'd like to see more data on the time per request - median, 95th percentile, 99th percentile, and any other statistical function that makes sense to include.  In my environment, the first bunch of queries after startup tend to take several seconds each.  I find that the average value tends to be useless until it has several thousand queries under its belt and the caches are thoroughly warmed.  The statistical functions I have mentioned would quickly eliminate the influence of those initial slow queries.
> The system will have to store individual data about each query.  I don't know if this is something Solr does already.  It would be nice to have a configurable count of how many of the most recent data points are kept, to control the amount of memory the feature uses.  The default value could be something like 1024 or 4096.

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