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Posted to dev@lucene.apache.org by "Varun Thacker (JIRA)" <ji...@apache.org> on 2018/08/04 03:49:00 UTC
[jira] [Commented] (SOLR-12616) Track down performance slowdowns
with ExportWriter
[ https://issues.apache.org/jira/browse/SOLR-12616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16569031#comment-16569031 ]
Varun Thacker commented on SOLR-12616:
--------------------------------------
Patch which tests {{SingleValueSortDoc}} vs SortDoc
Indexed 25M docs onto a 1 shard X 1 replica collection.
query - {{/export?q=*:*&fl=id&sort=id desc}}
With {{-Dtest.export.writer.optimized=true}} = 7m13 , 7m23
Without {{-Dtest.export.writer.optimized=true}} = 10m27 , 10m31
I haven't started looking into what's difference b/w SortDoc and SingleValueSortDoc because of which we see such speed differences.
> Track down performance slowdowns with ExportWriter
> --------------------------------------------------
>
> Key: SOLR-12616
> URL: https://issues.apache.org/jira/browse/SOLR-12616
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Varun Thacker
> Priority: Major
> Attachments: SOLR-12616.patch
>
>
> Just to be clear for users glancing through this Jira : The performance slowdown is currently on an unreleased version of Solr so no versions are affected by this.
> While doing some benchmarking for SOLR-12572 , I compared the export writers performance against Solr 7.4 and there seems to be some slowdowns that have been introduced. Most likely this is because of SOLR-11598
> In an 1 shard 1 replica collection with 25M docs. We issue the following query
> {code:java}
> /export?q=*:*&sort=id desc&fl=id{code}
> Solr 7.4 took 8:10 , 8:20 and 8:22 in the 3 runs that I did
> Master took 10:46
> Amrit's done some more benchmarking so he can fill in with some more numbers here.
>
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