“Average disk I/Os returned” reports the percentage of “Checks Returning I/O” that result in one or more completed I/Os.
Increasing the amount of time that Adaptive Server engines wait between checks may result in better throughput because Adaptive Server engines can spend more time processing if they spend less time checking for I/O. However, you should verify this for your environment. If the value for I/O Busy% is high, then Adaptive Server should perform more frequent checks to pick up I/Os as soon as they are completed. The i/o polling process count configuration parameter controls how often Adaptive Server performs this check.
For more information about configuration parameters, see Chapter 5, “Setting Configuration Parameters,” in the System Administration Guide, Volume 1.
