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https://issues.apache.org/jira/browse/SOLR-4509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15200978#comment-15200978
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Mark Miller commented on SOLR-4509:
-----------------------------------

I've got this mostly working - new httpclient impls are much better. Security 
and SSL have really nestled into this late config binding that the 
httpclientconfigurer stuff allowed and does not anymore (builder pattern) 
though, so I'll probably bail on it.

> Disable HttpClient stale check for performance.
> -----------------------------------------------
>
>                 Key: SOLR-4509
>                 URL: https://issues.apache.org/jira/browse/SOLR-4509
>             Project: Solr
>          Issue Type: Improvement
>          Components: search
>         Environment: 5 node SmartOS cluster (all nodes living in same global 
> zone - i.e. same physical machine)
>            Reporter: Ryan Zezeski
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 5.0, master
>
>         Attachments: IsStaleTime.java, SOLR-4509-4_4_0.patch, 
> SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch, 
> SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch, 
> SOLR-4509.patch, baremetal-stale-nostale-med-latency.dat, 
> baremetal-stale-nostale-med-latency.svg, 
> baremetal-stale-nostale-throughput.dat, baremetal-stale-nostale-throughput.svg
>
>
> By disabling the Apache HTTP Client stale check I've witnessed a 2-4x 
> increase in throughput and reduction of over 100ms.  This patch was made in 
> the context of a project I'm leading, called Yokozuna, which relies on 
> distributed search.
> Here's the patch on Yokozuna: https://github.com/rzezeski/yokozuna/pull/26
> Here's a write-up I did on my findings: 
> http://www.zinascii.com/2013/solr-distributed-search-and-the-stale-check.html
> I'm happy to answer any questions or make changes to the patch to make it 
> acceptable.
> ReviewBoard: https://reviews.apache.org/r/28393/



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