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Posted to dev@lucene.apache.org by "Mark Miller (JIRA)" <ji...@apache.org> on 2014/11/25 13:00:17 UTC
[jira] [Comment Edited] (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=14224444#comment-14224444 ]
Mark Miller edited comment on SOLR-4509 at 11/25/14 11:59 AM:
--------------------------------------------------------------
It reduces latency and removes the stale check that can easily race with the server. Did you read the linked original write up and http client docs around stale check?
was (Author: markrmiller@gmail.com):
It reduces latency and removes the stale check that can easily race with the server. Did you read the linked original write up and http client docs around stake check?
> 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, 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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