MONITOR IO

IO is a class of statistics collected by the MONITOR utility. It includes the following data items:

• Direct I/O Rate: rate of direct I/O (for example, disk and tape) operations
• Buffered I/O Rate: rate of buffered I/O (for example, terminal and line printer) operations
• Mailbox Write Rate: rate of write-to-mailbox requests received by the system
• Split Transfer Rate: rate at which transfers were split into multiple I/Os
• Log Name Translation Rate: rate of logical name translations
• File Open Rate: rate at which files were opened
• Page Fault Rate: rate of occurrence of page faults for all working sets
• Page Read Rate: rate of pages read from disk as a result of page faults
• Page Read I/O Rate: rate of read I/O operations from disk as a result of page faults
• Page Write Rate: rate of pages written to the page file
• Page Write I/O Rate: rate of write I/O operations to the page file
• Inswap Rate: rate at which working sets were read into memory from the swap file
• Free List Size: number of pages on the free page list
• Modified List Size: number of pages on the modified page list

See also

• MONITOR
• OpenVMS System Management Utilities Reference Manual Vol. II (M-Z)