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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-1972) Need additional query stats in admin interface - median, 95th and 99th percentile
Date Wed, 06 Jul 2011 23:29:16 GMT

     [ https://issues.apache.org/jira/browse/SOLR-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrien Grand updated SOLR-1972:
-------------------------------

    Attachment: SOLR-1972.patch

Hi Shawn,

I fixed the patch so that rolling statistics are now consistent with non-rolling statistics
for the first requests. Average requests by second may sometimes be a little different, but
ensuring rolling and non-rolling statistics have exactly the same value would require more
synchronization, which is not an option in my opinion.

Please let me know if you still get negative values for rollingAvgRequestsPerSecond with this
patch.

I hope this patch is the good one!

> 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.patch, SOLR-1972.patch, SOLR-1972.patch, SOLR-1972.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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