I/O page usage

Command: sar -B

      pgpgin/s
	     Total number of kilobytes the system paged in  from  disk
	     per second.  Note: With old kernels (2.2.x) this value is
	     a number of blocks per second (and not kilobytes).

      pgpgout/s
	     Total number of kilobytes the system paged  out  to  disk
	     per second.  Note: With old kernels (2.2.x) this value is
	     a number of blocks per second (and not kilobytes).