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Ryan Zezeski commented on SOLR-4509: ------------------------------------ > Would the 100ms latency you have described here show up in QTime values or be > purely client-side? So my latency measurements include end-to-end from client->yokozuna->solr coordinator->shards->solr coordinator->yokozuna->client. I didn't track the QTimes, but in benchmarks I ran months ago I saw the same results whether I went through Yokozuna or hit Solr directly with the distributed search. I could probably re-run to report QTime changes. > I ask because the median (not average)... I'm also reporting median latency, not mean. In my first link you can also find graphs with 95th, 99th, 99.9 percentiles. > ...an assumption of a server timeout of 50 milliseconds The assumption is 50s, but yes, it is an assumption. A better patch would make the idle timeout configurable as well as the period. > If these are not actual worries, then I can be quiet. No, these are great points. This patch, as it sits now, is for a specific context. I did what I needed to do to improve my specific situation. Honestly, I would like to see another person run this patch and verify at least some amount of speed-up. Otherwise, it might best stay downstream. > Disable Stale Check - Distributed Search (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 > Priority: Minor > Attachments: SOLR-4509.patch > > > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org