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Posted to dev@lucene.apache.org by "Gregory Chanan (JIRA)" <ji...@apache.org> on 2014/12/01 23:21:13 UTC
[jira] [Commented] (SOLR-4509) Disable HttpClient stale check for
performance and fewer spurious connection errors.
[ https://issues.apache.org/jira/browse/SOLR-4509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14230564#comment-14230564 ]
Gregory Chanan commented on SOLR-4509:
--------------------------------------
One other thing to consider, and I'm not sure if this applies to that release note, is that there are major API changes that in HttpClient 4.4 that you need to use to get the new features. In general everything is done via builders, so you can't change many configuration settings after creating the httpclient. There are APIs in HttpSolrServer and elsewhere that let you change the configuration that would have to be reworked.
> Disable HttpClient stale check for performance and fewer spurious connection errors.
> ------------------------------------------------------------------------------------
>
> 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, Trunk
>
> Attachments: IsStaleTime.java, SOLR-4509-4_4_0.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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