[SOLR-8251] MatchAllDocsQuery is much slower in solr5.3.1 compare to solr4.7

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.3, 5.3.1
• Fix Version/s: 5.5, 6.0
• Component/s: search
• Assignee: Yonik Seeley
• Reporter: wei shen
• Created: 07/Nov/15 07:49
• Updated: 09/May/16 18:45
• Resolved: 08/Feb/16 17:43

Description

I am trying to upgrade our production solr instance from 4.7 to 5.3.1. Unfortunately when I do load testing I find the MatchAllDocsQuery is much slower in solr 5.3.1 compare to 4.7. (solr 5.3.1 is faster in load test with queries other than MatchAllDocsQuery). I asked solr-user and discussed with Yonik Seeley. He confirmed that he can see the problem too comparing solr 5.3.1 and 4.10.

here is the query I use:

q={!cache=false}*:*&fq=+categoryIdsPath:1001&fl=id&start=0&rows=2&debug=true

for me the query is consistently about 60-70% slower on solr5 than solr4.

Yonik mentioned in his email "For me, 5.3.1
is about 5x slower than 4.10 for this particular query."

Issue Links

• relates to: LUCENE-6889 BooleanQuery.rewrite could easily optimize some simple cases