Guido Wimmel created SYNCOPE-408:
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             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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