Slow IO Performance: WARNING:io_submit failed due to kernel limitations MAXAIO for process=128 (Doc ID 2175723.1)

Last updated on JULY 08, 2017

Applies to:

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

Symptoms

Slow IO performance with the following warning messages:

WARNING:io_submit failed due to kernel limitations MAXAIO for process=128 pending aio=128
WARNING:asynch I/O kernel limits is set at AIO-MAX-NR=1048576 AIO-NR=180814

 

Cause

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