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Support Article

Merge SQL statements takes more than 30 seconds to complete

SA-16029

Summary



When committing several objects to the Pega database, a merge statement is generated by the engine. This merge statement takes >30 seconds to complete consistently.


Error Messages



*Database batch execution took more than the threshold of 500 ms: 30,880 ms SQL: MERGE INTO . . .


Steps to Reproduce



Run application code to update several work objects.


Root Cause



A defect or configuration issue in the operating environment: This issue is based on Oracle Bug 6376915 - HW enqueue contention for ASSM LOB segments. Please review information on this bug on the Oracle support site for more information.


Resolution



Make the following change to the operating environment:

Perform Oracle recommended changes to the database to correct the poor database write performance. 

Published January 31, 2016 - Updated October 8, 2020

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