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From "Ard Schrijvers (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1225) ReadOnlyIndexReaders are re-created on every access
Date Wed, 21 Nov 2007 11:16:43 GMT

    [ https://issues.apache.org/jira/browse/JCR-1225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12544421

Ard Schrijvers commented on JCR-1225:

Though, when nothing changed in any of the indexes, then the multiReader in MultiIndex is
still valid, and none of the readers are recreated. When a document is added or deleted, a
new multiReader  is created by creating all ReadOnlyIndexReaders again, but the SharedIndexReader
a ReadOnlyIndexReader depends on is reused when it did not change. Hence, as you explained
in JCR-1213, the readersByBase might still be the same. The only thing that must be recreated
every time is the 'deleted' BitSet, which I am not sure how long it takes for *large* indexes.

You think it is possible to add reuse of the ReadOnlyIndexReaders? 

> ReadOnlyIndexReaders are re-created on every access
> ---------------------------------------------------
>                 Key: JCR-1225
>                 URL: https://issues.apache.org/jira/browse/JCR-1225
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: query
>            Reporter: Marcel Reutegger
>            Priority: Minor
> AbstractIndex.getReadOnlyIndexReader() creates a new instance on every call. The returned
index reader should instead be cached and kept open as long as there are no changes on the
underlying index.

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