When we utilize the 6 & 7 read records, we obtain the true system hit ratio. While the application hit ratio is important because it indicates application performance, this is across all application plans and can hide application performance problems caused by synchronous I/O wait times.

These types of statistics can easily be produced by writing some code...using SAS, PL/1, Assembler, or even in REXX.

The analysis is continued on the next slide.