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https://issues.apache.org/jira/browse/SOLR-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481655#comment-13481655
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Alan Woodward commented on SOLR-1972:
-------------------------------------
Here's a patch that uses the metrics library. It doesn't include Eric's regex
matching or anything at the moment - it basically just takes what's currently
in trunk, refactors it to use metrics' Counter and Timer objects, and adds the
rolling average data.
Cons:
- it adds another dependency to solr-core. It's a useful dependency, IMO,
but still.
- tests don't pass at the moment, as metrics spawns extra threads which the
test runner doesn't know how to deal with
Pros:
- it's a purpose-designed stats and metrics library, so we don't need to
worry about the maths or sampling algorithms
- it adds the functionality of the original ticket/patch in a much simpler
way.
The ideal solution would be a component of some kind, I think, but this at
least improves on what's in trunk at the moment.
> 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: 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.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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