ORA-27090: Unable to reserve kernel resources for asynchronous disk I/O in 12.1 (Doc ID 2188232.1)

Last updated on OCTOBER 05, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.

Symptoms

Started seeing the below error messages in the parallel slave processes in batch processing after migrating to 12.1. This was never a problem in earlier versions and used to work fine.

You would also observe the value of "fs.aio-nr" is no where close to the max value of "fs.aio-max-nr" during issue period. The value of "fs.aio-max-nr" is also set to sufficiently high value and more than minimal recommended value of 3145728. 

Changes

Upgrade to 12.1.0.1/12.1.0.2 or new 12.1.0.1/12.1.0.2 installation 

Cause

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