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https://issues.apache.org/jira/browse/SOLR-4509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15581898#comment-15581898
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Jan H√łydahl commented on SOLR-4509:
-----------------------------------

Covered in SOLR-9255

> Move to non deprecated HttpClient impl classes to remove stale connection 
> check on every request and move connection lifecycle management towards the 
> client.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-4509
>                 URL: https://issues.apache.org/jira/browse/SOLR-4509
>             Project: Solr
>          Issue Type: Improvement
>         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: master (7.0)
>
>         Attachments: 
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch, 
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch, 
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch, 
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch, 
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch, 
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch, 
> 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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