Space Related Dictionary View Performance Slow in Multitenant Database with Large Number of Pluggable Databases
(Doc ID 2053791.1)
Last updated on JULY 04, 2021
Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.1 and laterOracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database 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 a multitenant database where large number of PDB (pluggable database) reside (for example, over 200), the following dictionary tables are reported to have notably bad performance:
- Also Enterprise Manager Cloud Control 12c refers to several of these views with UNION clause in Administration -> Storage -> Tablespace page which may cause slow loading of the page
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |