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From "Ard Schrijvers (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-1196) Queries for DescendantSelfAxisWeight/ChildAxisQuery are currently very heavy and become slow pretty quickly
Date Tue, 30 Oct 2007 11:20:50 GMT
Queries for DescendantSelfAxisWeight/ChildAxisQuery are currently very heavy and become slow
pretty quickly
-----------------------------------------------------------------------------------------------------------

                 Key: JCR-1196
                 URL: https://issues.apache.org/jira/browse/JCR-1196
             Project: Jackrabbit
          Issue Type: Improvement
          Components: query
    Affects Versions: 1.3.3
            Reporter: Ard Schrijvers
             Fix For: 1.4


A query like 

/documents/en/news//*[@modificationDate] order by @modificationDate

when  there are many nodes ( > 1.000) in  /documents/en/news becomes very slow. I think
the bottleneck is in something like recursive filters in lucene. First off all I'll try to
find some stastistics about the performance, and describe the bottleneck. After that, a solution
must be found, where we need to keep in mind that 

1) these queries run faster and scale better (obviously)
2) moving a node must stay a cheap operation

Also see:

http://www.nabble.com/Search-performance--%3A-MultiIndex-tf4695559.html#a13421949




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