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WARNING: [81] Files Are Incapable Of Handling Async I/Os & WARNING: OS Does Not Allow Async I/Os. Calibrate_IO Results Will Be Unreliable. (Doc ID 2704777.1)

Last updated on SEPTEMBER 10, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 18.10.0.0.0 and later
Information in this document applies to any platform.

Symptoms

Running DBMS_RESOURCE_MANAGER.CALIBRATE_IO fails with the below error:

WARNING: [81] files are incapable of handling async I/Os.
Results of dbms_resource_manager.calibrate_io() may be improved by configuring async I/O for these files.
WARNING: OS does not allow async I/Os. Calibrate_IO results will be unreliable.
2020-08-24T21:23:10.076767+02:00
WARNING: [81] files are incapable of handling async I/Os.
Results of dbms_resource_manager.calibrate_io() may be improved by configuring async I/O for these files.
WARNING: OS does not allow async I/Os. Calibrate_IO results will be unreliable.

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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