| Description | This counter type shows the average number of operations completed during each second of the sample interval. Counters of this type measure time in ticks of the system clock. The F variable represents the number of ticks per second. The value of F is factored into the equation so that the result can be displayed in seconds. This counter type is the same as the PERF_COUNTER_COUNTER type, but it uses larger fields to accommodate larger values. |
| Generic type | Difference |
| Formula | (N1 - N0) / ( (D1 - D0) / F, where the numerator (N) represents the number of operations performed during the last sample interval, the denominator (D) represent the number of ticks elapsed during the last sample interval, and F is the frequency of the ticks. |
| Average | (Nx - N0) / ((Dx - D0)/ F) |
| Example | System\ File Read Bytes/sec |