With Subquery Factorization Temp Table Does Not Cache in Standby in 12.1.0.2
(Doc ID 2251339.1)
Last updated on MARCH 28, 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 Backup Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
- Huge IOs when using materialization of with_subquery on standby database
- High usage of temp with high disk time, as generated from with_subquery factorization
- Query is slower on standby vs primary
Changes
after upgrading to 12.1.0.2 patchset or 11.2.0.4.6 DBPSU and above
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |