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https://issues.apache.org/jira/browse/SOLR-12616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Thacker resolved SOLR-12616.
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Resolution: Fixed
Fix Version/s: 7.5
master (8.0)
> 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)
> Components: streaming expressions
> Reporter: Varun Thacker
> Priority: Major
> Fix For: master (8.0), 7.5
>
> Attachments: DefaultCode-1.png, DefaultCode-2.png, SOLR-12616.patch,
> SOLR-12616.patch, SingleSortValue-1.png, SingleSortValue-2.png
>
>
> 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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