AUTO_AIOVPS configuration parameter

The AUTO_AIOVPS configuration parameter enables the database server to automatically increase the number of asynchronous I/O virtual processors (AIO VPs) and page cleaner threads when the database server detects that the I/O workload outpaced the performance of the existing AIO VPs.

onconfig.std value
Not set. If the AUTO_TUNE configuration parameter is set to 1, AIO VPs and page cleaner threads are automatically increased.
0 = Off

1 = On

takes effect
After you edit your onconfig file and restart the database server.
When you reset the value dynamically in your onconfig file by running the onmode -wf command.
When you reset the value in memory by running the onmode -wm command.
If an AUTO_AIOVPS value is not set in your current onconfig file and you edit the AUTO_TUNE configuration parameter and restart the database server


The VPCLASS aio configuration parameter controls the number of AIO VPs, If the VP aio parameter is not set in the onconfig file, the initial number of AIO VPs the database server starts when AUTO_AIOVPS is enabled is equal to the number of AIO chunks. The maximum number of AIO VPs the database server can start if VP aio is not set is 128.

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