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https://issues.apache.org/jira/browse/SOLR-8251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15075368#comment-15075368
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Uwe Schindler commented on SOLR-8251:
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Should be solved for 5.4 already! But we are not sure if there is still a
slowdown. Somebody with the tools to benchmark Solr should do this.
> MatchAllDocsQuery is much slower in solr5.3.1 compare to solr4.7
> ----------------------------------------------------------------
>
> Key: SOLR-8251
> URL: https://issues.apache.org/jira/browse/SOLR-8251
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 5.3, 5.3.1
> Reporter: wei shen
> Fix For: 5.4
>
>
> 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:
> {code}
> q={!cache=false}*:*&fq=+categoryIdsPath:1001&fl=id&start=0&rows=2&debug=true
> {code}
> 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."
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