diegoceccarelli commented on a change in pull request #300: SOLR-11831: Skip second grouping step if group.limit is 1 (aka Las Vegas Patch) URL: https://github.com/apache/lucene-solr/pull/300#discussion_r326550620
########## File path: solr/solr-ref-guide/src/result-grouping.adoc ########## @@ -114,6 +114,11 @@ Setting this parameter to a number greater than 0 enables caching for result gro + Testing has shown that group caching only improves search time with Boolean, wildcard, and fuzzy queries. For simple queries like term or "match all" queries, group caching degrades performance. +`group.skip.second.step`:: +This parameter can be set to `true` if only one document per group needs to be retrieved. Result Grouping executes two searches; if enabled this option will disable the second search improving the performance. By default the value is set to `false`. It can be set to `true` of if `group.limit` is 1, and `group.sort` fields list is a prefix of `sort` fields list (e.g., if `sort=id asc,name desc` and `group.sort=id asc` is fine, but `sort=id asc,name desc` and `group.sort=name desc` is not). Also it cannot be used together with <<other-parsers.adoc#re-ranking-query-parser,Re-ranking Query Parser>>. Review comment: Merged thanks! ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
