[jira] [Resolved] (SOLR-12616) Track down performance slowdowns with ExportWriter

["Varun Thacker (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-12616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Varun Thacker resolved SOLR-12616.
----------------------------------
       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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