[
https://issues.apache.org/jira/browse/SOLR-7036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14627497#comment-14627497
]
Erick Erickson commented on SOLR-7036:
--------------------------------------
Man, talk about a while. Anyway, I can't apply the patch and I spent some time
tonight trying to figure out what needed to change but then it went into the
weeds, compounded by the fact that I'm not all that familiar with the code.
[~jimtronic] Could I ask you to update the patch to _trunk_ a.k.a 6.x? Then
I'll merge it into 5x if all goes well.
[~yo...@apache.org][~hossman_luc...@fucit.org] You guys should know I'm an
amateur at all the faceting code. I'll look over what I can but if either of
you would like to weigh in on any new patch that would be great. Or anyone else
for that matter.
> Faster method for group.facet
> -----------------------------
>
> Key: SOLR-7036
> URL: https://issues.apache.org/jira/browse/SOLR-7036
> Project: Solr
> Issue Type: Improvement
> Components: faceting
> Affects Versions: 4.10.3
> Reporter: Jim Musil
> Assignee: Erick Erickson
> Fix For: 5.3, Trunk
>
> Attachments: SOLR-7036.patch, SOLR-7036.patch
>
>
> This is a patch that speeds up the performance of requests made with
> group.facet=true. The original code that collects and counts unique facet
> values for each group does not use the same improved field cache methods that
> have been added for normal faceting in recent versions.
> Specifically, this approach leverages the UninvertedField class which
> provides a much faster way to look up docs that contain a term. I've also
> added a simple grouping map so that when a term is found for a doc, it can
> quickly look up the group to which it belongs.
> Group faceting was very slow for our data set and when the number of docs or
> terms was high, the latency spiked to multiple second requests. This solution
> provides better overall performance -- from an average of 54ms to 32ms. It
> also dropped our slowest performing queries way down -- from 6012ms to 991ms.
> I also added a few tests.
> I added an additional parameter so that you can choose to use this method or
> the original. Add group.facet.method=fc to use the improved method or
> group.facet.method=original which is the default if not specified.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
