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Materialized View Creation Hangs On "Asynch Descriptor Resize" Wait Event (Doc ID 1326110.1)

Last updated on FEBRUARY 01, 2022

Applies to:

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


Create Materialized view statement hangs and never completes. It seems to wait a long time on "asynch descriptor resize" event. The same statement when run by itself or inside a create table as select statement finishes in less than a minute.

This wait event "asynch descriptor resize" indicates that the OS kernel is waiting for asynchronous IO to complete before it can re-size parameters to handle IO better.

Problem statement:


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