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From "wei shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8251) MatchAllDocsQuery is much slower in solr5.3.1 compare to solr4.7
Date Tue, 08 Mar 2016 21:36:41 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15185872#comment-15185872
] 

wei shen commented on SOLR-8251:
--------------------------------

seems the * in q=( * : * ) is filtered out and I can't modify or delete my comments

> 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
>            Assignee: Yonik Seeley
>             Fix For: 5.5, master
>
>         Attachments: Solr 4 vs Solr 5.png
>
>
> 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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