gtps3m0r | System Performance and Measurement Reference |
Data write, data read, and program read counts are accumulated each interval, divided by seconds, and added together to equal total accesses per second during a given interval. The total accesses are then accumulated for the mean. At the end of the tape, the accumulation for the mean is divided by the number of intervals.
Device queue counts are sampled every access, accumulated each interval, divided by samples, and accumulated for the mean. At the end of the tape the accumulation for the mean is divided by the number of intervals.
A symbolic tape name of YYY denotes that a specified tape drive was inactive at the start of the collection, and that an unspecified tape was mounted on that tape drive or varied online during the collection.