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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (JCR-3477) Lazy query result sets
Date Tue, 04 Dec 2012 17:33:58 GMT

    [ https://issues.apache.org/jira/browse/JCR-3477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509885#comment-13509885
] 

Michael Dürig commented on JCR-3477:
------------------------------------

I encountered this issue while investigating the root cause for JCR-3473. The problem already
occurs on running the query (no need to fetch the result rows/nodes). I wonder what the original
expectation for queries was. The presence of LargeResultSetTest leads me to believe that such
queries should actually work but unfortunately JCR-3472 prevented us from detecting they don't.
If OTOH we don't except these queries to work, we need to find a way to fix JCR-3473 without
having to rely on queries.
                
> Lazy query result sets 
> -----------------------
>
>                 Key: JCR-3477
>                 URL: https://issues.apache.org/jira/browse/JCR-3477
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Alex Parvulescu
>            Priority: Minor
>
> Following JCR-3472, I'd like to open a discussion on what can be reasonably expected
from a query that does/can do lazy fetching of results.
> Creating ~110k nodes and fetching them all looks like it goes in the vicinity of 400mb
of memory, so the default 256mb setup for tests is not sufficient to run such a test, as we've
already seen on JCR-3472.
> What are the expectations around lazy loading and queries that can potentially hit a
high number of nodes.

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