Lost CPU

This section reports occurrences of the CPU's inability to execute because of some memory limitation.

Page Wait: Percentage of time that the CPU was idle and at least one disk device had paging I/O in progress. In a multiprocessor system, all CPUs must be idle.
Swap Wait: Percentage of time that the CPU was idle and at least one disk device had swapping I/O in progress. This includes both swapping and modified page writing. In a multiprocessor system, both CPUs must be idle.
Page or Swp Wait: Percentage of time that the CPU was idle and at least one disk device had either page I/O or swap I/O in progress. In a multiprocessor system, both CPUs must be idle. Page and swap data is based on statistics Performance collects at 100-millisecond intervals from I/Os waiting to be processed.