This monitoring program provides information on the number and average duration of file access, provided that access was by way of the privileged I/O output system PPAM. This includes file access using the methods EAM (Evanescent Access Method) and ISAM (Indexed Sequential Access Method).
In addition, data is recorded for the access methods SAM (Sequential Access Method) and UPAM (User Primary Access Method), all disk access, and all access to magnetic tape files with standard blocks.
The FILE monitoring program also records the access times to files. The monitored time covers the logical duration of I/O operations between start and end of a job from the point of view of the software. For asynchronous I/O operations, this time can be considerably greater than the hardware time.
In the case of multiprocessor systems, monitoring is restricted to I/O operations originating in the local system running SM2.
Overall, a maximum of 32 files can be monitored with this monitoring program.