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'db file async I/O submit' when FILESYSTEMIO_OPTIONS=NONE (Doc ID 1274737.1)

Last updated on AUGUST 31, 2023

Applies to:

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


According to the Oracle documentation, asynch I/O is disabled for normal file systems if FILESYSTEMIO_OPTIONS=NONE.
However, when setting DISK_ASYNCH_IO to TRUE, the wait event list shows 'db file async I/O submit'.


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