Hi, Does use of DocValues provide any performance improvement for Grouping ? I' looked into the blog which mentions improving Grouping performance through DocValues.
https://lucidworks.com/blog/fun-with-docvalues-in-solr-4-2/ Right now, Group by queries (which I can't sadly avoid) has become a huge bottleneck. It has an overhead of 60-70% compared to the same query san group by. Unfortunately, I'm not able to be CollapsingQParserPlugin as it doesn't have a support similar to "group.facet" feature. My understanding on DocValues is that it's intended for faceting and sorting. Just wondering if anyone have tried DocValues for Grouping and saw any improvements ? -Thanks, Shamik
