Performance Issues While Monitoring the Unified Audit Trail of an Oracle12c Database
(Doc ID 2063340.1)
Last updated on JUNE 18, 2021
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 12.1]
Information in this document applies to any platform.
While using EM Cloud Control 12c to monitor the Unified audit trail of an Oracle12c database, you observe high CPU usage.
The problem may also be observed from SQL*Plus when querying the UNIFIED_AUDIT_TRAIL view. If there are a large number of audit records in the Unified audit trail then query performance can be really slow.
After the Unified audit trail is purged using the DBMS_AUDIT_MGMT package, the CPU usage is much less.
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