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https://issues.apache.org/jira/browse/SOLR-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484964#comment-13484964
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Alan Woodward commented on SOLR-1972:
-------------------------------------

Yeah, the toString hack is quite ... hacky.  The problem with using the request 
handler path as the scope (which I agree would be logical) is that this isn't 
available until init() is called, and both getStatistics() and handleRequest() 
can get called before init().

Having one MetricsRegistry per request handler looks a lot more sensible 
though.  I'll put a patch together.  Thanks!
                
> 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
>          Components: web gui
>    Affects Versions: 1.4
>            Reporter: Shawn Heisey
>            Assignee: Alan Woodward
>            Priority: Minor
>             Fix For: 4.1
>
>         Attachments: elyograg-1972-3.2.patch, elyograg-1972-3.2.patch, 
> elyograg-1972-trunk.patch, elyograg-1972-trunk.patch, 
> SOLR-1972-branch3x-url_pattern.patch, SOLR-1972-branch4x.patch, 
> SOLR-1972-branch4x.patch, SOLR-1972_metrics.patch, SOLR-1972_metrics.patch, 
> SOLR-1972_metrics.patch, SOLR-1972_metrics.patch, SOLR-1972_metrics.patch, 
> SOLR-1972.patch, SOLR-1972.patch, SOLR-1972.patch, SOLR-1972.patch, 
> SOLR-1972-url_pattern.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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