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From Walter Underwood <wun...@wunderwood.org>
Subject Re: Best way to track cumulative GC pauses in Solr
Date Fri, 13 Nov 2015 16:50:07 GMT
Also, what GC settings are you using? We may be able to make some suggestions.

Cumulative GC pauses aren’t very interesting to me. I’m more interested in the longest
ones, 90th percentile, 95th, etc.

wunder
Walter Underwood
wunder@wunderwood.org
http://observer.wunderwood.org/  (my blog)

> On Nov 13, 2015, at 8:32 AM, Shawn Heisey <apache@elyograg.org> wrote:
> 
> On 11/13/2015 8:00 AM, Tom Evans wrote:
>> We have some issues with our Solr servers spending too much time
>> paused doing GC. From turning on gc debug, and extracting numbers from
>> the GC log, we're getting an idea of just how much of a problem.
> 
> Try loading your gc log into gcviewer.
> 
> https://github.com/chewiebug/GCViewer/releases
> 
> Here's a screenshot of this in action with a gc log from Solr loaded:
> 
> https://www.dropbox.com/s/orwt0fcmii5691l/solr-gc-gcviewer-1.35-snapshot.png?dl=0
> 
> This screenshot is from a snapshot build including a feature request
> that I made:
> 
> https://github.com/chewiebug/GCViewer/issues/139
> 
> If you use the 1.34.1 version, you will not see some of the numbers
> shown in my screenshot, but the info you asked for, accumulated GC
> pauses, IS included in that version.
> 
> Thanks,
> Shawn
> 


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