When you're facing performance bottlenecks, you'll often find the I/O layer is the culprit. If you're using a Storage Area Network (SAN), it's natural to look at the SAN configuration. You might focus on RAID levels, the layout of data on the disks, and the speed of the disks themselves; however, even with a fast SAN, you can still experience slow I/O because of bottlenecks at the operating system level. There are a few parameters on AIX which are worth looking at to ease ...

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