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PSTAT(8)		  BSD System Manager's Manual		      PSTAT(8)

NAME
     pstat, swapinfo — display system data structures

SYNOPSIS
     pstat [-Tfghkmnst] [-M core [-N system]]
     swapinfo [-ghkm] [-M core [-N system]]

DESCRIPTION
     The pstat utility displays open file entry, swap space utilization, ter‐
     minal state, and vnode data structures.

     If invoked as swapinfo the -s option is implied, and only the -k, -m, -g,
     and -h options are legal.

     If the -M option is not specified, information is obtained from the cur‐
     rently running kernel via the sysctl(3) interface.	 Otherwise, informa‐
     tion is read from the specified core file, using the name list from the
     specified kernel image (or from the default image).

     The following options are available:

     -n	     Print devices out by major/minor instead of name.

     -h	     “Human-readable” output.  Use unit suffixes when printing swap
	     partition sizes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and
	     Petabyte.

     -k	     Print sizes in kilobytes, regardless of the setting of the
	     BLOCKSIZE environment variable.

     -m	     Print sizes in megabytes, regardless of the setting of the
	     BLOCKSIZE environment variable.

     -g	     Print sizes in gigabytes, regardless of the setting of the
	     BLOCKSIZE environment variable.

     -T	     Print the number of used and free slots in several system tables.
	     This is useful for checking to see how large system tables have
	     become if the system is under heavy load.

     -f	     Print the open file table with these headings:

	     LOC     The core location of this table entry.

	     TYPE    The type of object the file table entry points to.

	     FLG     Miscellaneous state variables encoded thus:

		     R	     open for reading
		     W	     open for writing
		     A	     open for appending
		     I	     signal pgrp when data ready

	     CNT     Number of processes that know this open file.

	     MSG     Number of messages outstanding for this file.

	     DATA    The location of the vnode table entry or socket structure
		     for this file.

	     OFFSET  The file offset (see lseek(2)).

     -s	     Print information about swap space usage on all the swap areas
	     compiled into the kernel.	The first column is the device name of
	     the partition.  The next column is the total space available in
	     the partition.  The Used column indicates the total blocks used
	     so far; the Available column indicates how much space is remain‐
	     ing on each partition.  The Capacity reports the percentage of
	     space used.

	     If more than one partition is configured into the system, totals
	     for all of the statistics will be reported in the final line of
	     the report.

     -t	     Print table for terminals with these headings:

	     LINE    Device name.

	     INQ     Number of characters that can be stored in the input
		     queue.

	     CAN     Number of characters in the input queue which can be
		     read.

	     LIN     Number of characters in the input queue which cannot be
		     read yet.

	     LOW     Low water mark for input.

	     OUTQ    Number of characters that can be stored in the output
		     queue.

	     USE     Number of bytes in the output queue.

	     LOW     Low water mark for output.

	     COL     Calculated column position of terminal.

	     SESS    Kernel address of the session structure.

	     PGID    Process group for which this is the controlling terminal.

	     STATE   Miscellaneous state variables encoded thus:

		     I	     init/lock-state device nodes present
		     C	     callout device nodes present
		     O	     opened
		     c	     console in use
		     G	     gone
		     B	     busy in open(2)
		     Y	     send SIGIO for input events
		     L	     next character is literal
		     H	     high watermark reached
		     X	     open for exclusive use
		     S	     output stopped (ixon flow control)
		     l	     block mode input routine in use
		     Z	     connection lost
		     s	     i/o being snooped
		     b	     busy in read(2) or write(2)

		     The ‘i’ and ‘o’ characters refer to the previous charac‐
		     ter, to differentiate between input and output.

     -M	     Extract values associated with the name list from the specified
	     core.

     -N	     If -M is also specified, extract the name list from the specified
	     system instead of the default, which is the kernel image the sys‐
	     tem has booted from.

SEE ALSO
     ps(1), systat(1), stat(2), fs(5), iostat(8), vmstat(8)

     K. Thompson, UNIX Implementation.

HISTORY
     The pstat utility appeared in 4.0BSD.

BUGS
     Does not understand NFS swap servers.

BSD				August 20, 2008				   BSD
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