Monitor buffers with ON-Monitor (UNIX)

You can use ON-Monitor to obtain statistics about cached reads and writes.

To access the onstat -p fields (bufreads, %cached, bufwrits %cached), select the Status > Profile option.

Here is an example of cached read and write statistics in the Profile option of the ON-Monitor Status menu:
...

Disk Reads  Buff. Reads    %Cached  Disk Writes  Buff. Writes    %Cached
       177         330      46.36            4            0        0.00
...