NAME

bufstat − print I/O buffer usage

SYNOPSIS

bufstat [ ifn ] [ interval ] [ corefile ] [ namelist ]

DESCRIPTION

The bufstat printout shows the current usage of the system’s I/O buffer cache.  The optional argument ’i’ specifies that the printout should be repeated every interval seconds.  The ’f’ option causes corefile to be used as memory instead of /dev/mem.  The ’n’ option declares that the system namelist should be obtained from namelist instead of /unix.  Single or multiple options may be specified.  The arguments interval, corefile, and namelist must occur in the same order as the options [ifn]. 

Information printed by bufstat includes; Physical memory address of the buffer, number of I/O operations on the buffer since system startup, the byte count and logical block number for the last I/O operation on the buffer, the error code, the ’name’ of the device that owns the buffer, and the buffer header flags.  Where ’name’ is the special file name for the device, e.g., hk00, rl0, etc., or the device’s major/minor device number, if the special file cannot be located. 

FILES

/unix    - default system namelist
/dev/mem - default system memory

SEE ALSO

Refer to the ULTRIX-11 System Management Guide, Section 9.5.2 for an example of a bufstat printout.