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From "Jukka Zitting (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (JCR-3064) Concurrent access performance drop
Date Tue, 11 Oct 2011 11:53:11 GMT

     [ https://issues.apache.org/jira/browse/JCR-3064?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jukka Zitting updated JCR-3064:
-------------------------------

    Attachment: ConcurrentReadWriteTest-2011.png
                ConcurrentReadTest-2011.png

To help narrow down the cause of the problem I ran the concurrent performance tests over Jackrabbit
trunk from each week of this year. See the attached -2011 graphs for the results.

Based on these measurements it looks like the problem was introduced already late last year
after we branched 2.2. I'll run another series of tests to better isolate the troublesome
change.
                
> Concurrent access performance drop
> ----------------------------------
>
>                 Key: JCR-3064
>                 URL: https://issues.apache.org/jira/browse/JCR-3064
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>            Reporter: Jukka Zitting
>            Priority: Blocker
>             Fix For: 2.4
>
>         Attachments: ConcurrentReadTest-2011.png, ConcurrentReadTest.png, ConcurrentReadWriteTest-2011.png,
ConcurrentReadWriteTest.png, JCR-3064-EntryCollector.patch, visualvm-ConcurrentReadTest-2.2.png,
visualvm-ConcurrentReadTest-2.3.png
>
>
> Our performance tests show a pretty bad drop in concurrent access performance (both read
and write) in the latest trunk when compared to Jackrabbit 2.2. We need to track down the
cause and fix it before the 2.3 release.

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