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Posted to dev@lucene.apache.org by "Varun Thacker (JIRA)" <ji...@apache.org> on 2018/08/03 01:56:00 UTC

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

Varun Thacker created SOLR-12616:
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             Summary: 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


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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