Hi everyone,
I'm seeing very bad performance when grouping (field collapsing) using
group.facet=true with a large result set.
- I have an index with 2 million documents, and I query with five facet
fields (each with 30+ groups)
- If I set group.facet=false the query can take 2000ms on first run, but
no more than 250ms on subsequent execution
- If I set group.facet=true it takes on average 18000ms on the first
run, and the same time on all subsequent runs (suggesting to me that a
cache is not being used)
I've checked the Solr Jira and several others are experiencing the same
issue:
https://issues.apache.org/jira/browse/SOLR-4763
Could anyone offer any advice or suggestions please? This is becoming a
blocking issue for us, and I'm very curious if this will be fixed in the
near future?
Best wishes,
Daniel
--
*Daniel Bryant | Software Development Consultant | www.tai-dev.co.uk
<http://www.tai-dev.co.uk/>*
daniel.bry...@tai-dev.co.uk <mailto:daniel.bry...@tai-dev.co.uk> | +44
(0) 7799406399 | Twitter: @taidevcouk <https://twitter.com/taidevcouk>
