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Posted to dev@jackrabbit.apache.org by "Christoph Kiehl (JIRA)" <ji...@apache.org> on 2007/08/15 09:17:30 UTC
[jira] Resolved: (JCR-1041) Avoid using BitSets in ChildAxisQuery
to minimize memory usage
[ https://issues.apache.org/jira/browse/JCR-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Christoph Kiehl resolved JCR-1041.
----------------------------------
Resolution: Fixed
Fix Version/s: 1.4
Added suggested patch with additional license headers in revision 566042
> Avoid using BitSets in ChildAxisQuery to minimize memory usage
> --------------------------------------------------------------
>
> Key: JCR-1041
> URL: https://issues.apache.org/jira/browse/JCR-1041
> Project: Jackrabbit
> Issue Type: Improvement
> Components: query
> Affects Versions: 1.3
> Reporter: Christoph Kiehl
> Assignee: Christoph Kiehl
> Fix For: 1.4
>
> Attachments: avoid_using_bitsets.patch
>
>
> When doing ChildAxisQueries on large indexes the internal BitSet instance (hits) may consume a lot of memory because the BitSet is always as large as IndexReader.maxDoc(). In our case we had a query consisting of 7 ChildAxisQueries which combined to a total of 14MB. Since we have multiple users executing this query simultaneously this caused an out of memory error.
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