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From "Guido Wimmel (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYNCOPE-408) Add index on task.executed
Date Thu, 01 Aug 2013 10:23:49 GMT
Guido Wimmel created SYNCOPE-408:
------------------------------------

             Summary: Add index on task.executed
                 Key: SYNCOPE-408
                 URL: https://issues.apache.org/jira/browse/SYNCOPE-408
             Project: Syncope
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.1.3
            Reporter: Guido Wimmel
            Priority: Minor
         Attachments: indexes.xml.patch

In our Syncope installation (1.1.3 on Tomcat/MySQL) we observed long execution times (>1s)
for TaskDAO.findToExec(), which is called periodically from NotificationJob to determine which
notifications should be sent.

According to our analysis, this is due to the fact that TaskDAO.findToExec() performs a full
scan on all entries of the task table with DTYPE="NotificationTask" (which could be a large
number as all executed tasks are kept), although only very few tasks are selected (those with
executed=0).

Creating an index on task.executed solved this problem; attached is a corresponding patch
against the branch 1.1.X.

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