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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-2107) Move page latching out of the lock manager
Date Wed, 25 Apr 2007 13:50:15 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Knut Anders Hatlen updated DERBY-2107:

    Attachment: derby-2107-4a.stat

Attaching a patch (4a) to address comment #3 from Suresh. It adds an assert which fails when
a transaction attempts to latch the same page twice. Also needed to update the test case added
by the 3a patch, since it now throws an assert failure instead of hanging when using a sane
build. All the tests ran cleanly.

> Move page latching out of the lock manager
> ------------------------------------------
>                 Key: DERBY-2107
>                 URL: https://issues.apache.org/jira/browse/DERBY-2107
>             Project: Derby
>          Issue Type: Improvement
>          Components: Performance, Services, Store
>    Affects Versions:
>            Reporter: Knut Anders Hatlen
>         Assigned To: Knut Anders Hatlen
>            Priority: Minor
>         Attachments: derby-2107-1a.diff, derby-2107-1a.stat, derby-2107-1b.diff, derby-2107-1c.diff,
derby-2107-1c.stat, derby-2107-1d.diff, derby-2107-2a.diff, derby-2107-2a.diff, derby-2107-2a.stat,
derby-2107-2a.stat, derby-2107-3a.diff, derby-2107-3a.stat, derby-2107-4a.diff, derby-2107-4a.stat
> Latching of pages could be done more efficiently locally in store than in the lock manager.
See the discussion here: http://thread.gmane.org/gmane.comp.apache.db.derby.devel/33135

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