How To Control # Of ASM Copy Channels When Create PDB From Another PDB (Pluggable database)
(Doc ID 1988108.1)
Last updated on JULY 22, 2021
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 12.1 to 12.2]
Oracle 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.
4 DB nodes
Oracle Database 12c 184.108.40.206.0
Customer is creating a PDB from another PDB when parallel_degree_policy is AUTO is using 40 ASM copy channels at the same time, for larger datafiles it is impacting system performance. When parallel_degree_policy is manual the copy is serial and very slow.
How can we control the number of channels?
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