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