PLSQL Notification Callback Slow After Upgrade From 10.2.0.3.0 To 11.2.0.3.0
(Doc ID 1502055.1)
Last updated on FEBRUARY 26, 2019
Applies to:
Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
In 11.2 AQ PL/SQL Notifications, and therefore user messages, are not processed due to the handling of an ORA-8177 reported on dequeue from the notification queue.
ALTER SESSION SET ISOLATION_LEVEL = SERIALIZABLE is used in the Advanced Queueing (AQ) callback procedure.
In 10.2 the same exception is reported but the user messages are still successfully and efficiently processed.
Changes
Upgrade from 10.2 to 11.2
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |