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Statistics Preference WAIT_TIME_TO_UPDATE_STATS (Doc ID 2302892.1)

Last updated on SEPTEMBER 27, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Oracle Database Cloud Schema 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
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

Gathering statistics (or other DBMS_STATS operation to update stats) upon those busy tables are a challenge sometimes,as there are cases where statistics gathering operation during high concurrent workloads based on specific pattern of access could create a hang situation with 'library cache lock' for a duration of the KGL timeout period(default 15 minutes) before failing with ORA-4021



Changes

Specific workload pattern and concurrency.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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