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Things to Check Before Downsizing ACFS Volume (Doc ID 1447518.1)

Last updated on DECEMBER 20, 2022

Applies to:

Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 11.2.0.2 to 19.3.0.0.0 [Release 11.2 to 19]
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
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

You want to check space in asm diskgroup +DATA and confirm which part of it is taken by ACFS volume.

Changes

You have allocated a very big disk for disk group +DATA. ASMCMD du command shows that only small portion is used but application users complain of low available space.
The following example displays information about the clients that are accessing the data disk group.


ASMVOL is listed everywhere but you do not know what this space is used for.

Cause

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