ORA-27090: Unable to reserve kernel resources for asynchronous disk I/O in 12.1

(Doc ID 2188232.1)

Last updated on MARCH 07, 2018

Applies to:

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


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. 


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