High CPU Parse Time On 12c On Complex Queries Which Uses Materialized With Subquery
(Doc ID 2233036.1)
Last updated on FEBRUARY 21, 2019
Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.2 and laterOracle 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 Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
- Very high hard parse time on 12.1.0.2.0 for complex SQL over 35 sec comparing to 3 seconds in Oracle 11.2.0.4
- They query uses complex materialized with subquery
Changes
Upgrade to 12.1.0.2 from 11.2.0.4.
Cause
To view full details, sign in with your My Oracle Support account. |
|
Don't have a My Oracle Support account? Click to get started! |
In this Document
Symptoms |
Changes |
Cause |
Solution |
References |