[jira] [Commented] (SOLR-6337) Moving the _versions_ field to DocValues

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

    [ https://issues.apache.org/jira/browse/SOLR-6337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14090431#comment-14090431 ] 

Varun Thacker commented on SOLR-6337:
-------------------------------------

SOLR-5670 is a related issue. 

I think we should keep this open till we can run some benchmarks to see what are the slowdowns during indexing and improvements in memory when we switch to DocValues.

> Moving the _versions_ field to DocValues
> ----------------------------------------
>
>                 Key: SOLR-6337
>                 URL: https://issues.apache.org/jira/browse/SOLR-6337
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Varun Thacker
>
> I was looking at VersionInfo.getVersionFromIndex and in Line 197 we use ValueSource to get the version field. 
> Moving it to DocValues should improve performance.
> Are there any downsides as to why it's a bad idea that I am missing here? 



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