Adjusting buffers
Adjusting buffers can affect performance. Adjust buffers when you see buffer performance begin to degrade, or if you want to add options to boost performance in anticipation of increased buffer activity.
This topic also discusses the performance implications of choosing a buffer size and number.
The size and number of buffers you can choose are described in Multiple buffers in virtual storage. To improve performance, read that topic and assess your current buffer settings before you adjust your buffers.