Varun Thacker created SOLR-11684:
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Summary: Solr should not cache cheap filters
Key: SOLR-11684
URL: https://issues.apache.org/jira/browse/SOLR-11684
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Varun Thacker
In the past I've seen clients who disabled the filter cache saw better query
performance.
I've never got the chance to investigate this unfortuinately.
I was reading through
https://lucidworks.com/2017/11/27/caching-and-filters-and-post-filters/ today
and this section is something I wanted to revisit
{code}
cache=false – Tells Solr that we don't need/want this filter to be cached
independently for re-use.
This will allow Solr to evaluate these filters at the same time it's
processing the main query
{code}
Lucene does optimizations like LUCENE-7680 (I think there are more which I can
link later on). Maybe Solr should also consult UsageTrackingQueryCachingPolicy
and not cache certain cheap filters?
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