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

     pstat - display system data structures

     pstat [-T | -f | -s | -t | -v] [-ghkmn] [-M core] [-N system]

     pstat displays open file entry, swap space utilization, terminal state,
     and vnode data structures.  If corefile is given, the information is
     sought there, otherwise in /dev/kmem.  The required namelist is taken
     from /netbsd unless system is specified.

     The following options are available:

     -T      Prints the number of used and free slots for open files, used
             vnodes, and swap space.  This option is useful for checking to
             see how large system tables become if the system is under heavy

     -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
                     S       shared lock present
                     X       exclusive lock present
                     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.

             USE     Number of active users of this open file.

             IFLG    Value of internal flags.

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

     -g      The -g option uses (1024 * 1024 * 1024) byte blocks instead of
             the default 512 byte.

     -h      Use humanize_number(3) to display (swap) sizes.

     -k      Use 1K-byte blocks.

     -m      The -m option uses (1024 * 1024) byte blocks instead of the
             default 512 byte.

     -n      Print devices by major/minor number rather than by name.

     -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
             remaining 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    Physical device name.

             RAW     Number of characters in raw input queue.

             CAN     Number of characters in canonicalized input queue.

             OUT     Number of characters in output queue.

             HWT     High water mark for output.

             LWT     Low water mark for output.

             COL     Calculated column position of terminal.

             STATE   Miscellaneous state variables encoded thus:

                     T       delay timeout in progress
                     O       open
                     F       outq has been flushed during DMA
                     C       carrier is on
                     B       busy doing output
                     A       process is awaiting output
                     X       open for exclusive use
                     S       output stopped
                     K       further input blocked
                     Y       tty in async I/O mode
                     D       state for lowercase `\' work
                     E       within a `\.../' for PRTRUB
                     L       next character is literal
                     P       retyping suspended input (PENDIN)
                     N       counting tab width, ignore FLUSHO
                     >       tty used for dialout

             SESS    Session for which this is controlling terminal.

             PGID    Current foreground process group associated with this

             DISC    Line discipline; `term' for TTYDISC (see termios(4)),
                     `tab' for TABLDISC , `slip' for SLIPDISC (see sl(4)),
                     `ppp' for PPPDISC (see ppp(4)), `strip' for STRIPDISC
                     (see strip(4)), `hdlc' for HDLCDISC.

     -v      Print the active vnodes.  Each group of vnodes corresponding to a
             particular filesystem is preceded by a two line header.  The
             first line consists of the following:

             *** MOUNT fstype from on on fsflags

             where fstype is one of adosfs, afs, cd9660, fdesc, ffs, ext2fs,
             kernfs, lfs, lofs, mfs, msdos, nfs, null, procfs, umap, union;
             from is the filesystem mounted from; on is the directory the
             filesystem is mounted on; and fsflags is a list of optional flags
             applied to the mount (see mount(8)).  The second line is a header
             for the individual fields, the first part of which are fixed, and
             the second part are filesystem type specific.  The headers common
             to all vnodes are:

             ADDR    Location of this vnode.

             TYP     File type.

             VFLAG   A list of letters representing vnode flags:

                     R       VV_ROOT root of its file system.
                     T       VI_TEXT pure text prototype.
                     S       VV_SYSTEM vnode being used by kernel.
                     I       VV_ISTTY vnode is a tty.
                     E       VI_EXECMAP vnode has PROT_EXEC mappings.
                     D       VU_DIROP lfs vnode involved in directory op.
                     O       VI_ONWORKLST vnode is on syncer work-list.
                     M       VV_MPSAFE file system is multithreaded

             USE     The number of references to this vnode.

             HOLD    The number of I/O buffers held by this vnode.

             TAG     The type of underlying data.

             NPAGE   The number of pages in this vnode.

             FILEID  The vnode fileid.  In the case of ffs or ext2fs this is
                     the inode number.

             IFLAG   Miscellaneous filesystem specific state variables encoded

                     For ffs, lfs or ext2fs:
                             A       access time must be corrected
                             C       changed time must be corrected
                             U       update time (fs(5)) must be corrected
                             M       contains modifications
                             a       has been accessed
                             R       has a rename in progress
                             S       shared lock applied
                             E       exclusive lock applied
                             c       is being cleaned (LFS)
                             D       directory operation in progress (LFS)
                             s       blocks to be freed in free count

                     For nfs:
                             W       waiting for I/O buffer flush to complete
                             P       I/O buffers being flushed
                             M       locally modified data exists
                             E       an earlier write failed
                             A       special file accessed
                             U       special file updated
                             C       special file times changed

                     Number of bytes in an ordinary file, or major and minor
                     device of special file.

     BLOCKSIZE  If the environment variable BLOCKSIZE is set, and the -k
                option is not specified, the block counts will be displayed in
                units of that size block.

     /netbsd       namelist
     /dev/kmem     default source of tables

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

     K. Thompson, Tn UNIX Implementation.

     The pstat command appeared in 4.0BSD.

     Swap statistics are reported for all swap partitions compiled into the
     kernel, regardless of whether those partitions are being used.

     Does not understand NFS swap servers.

NetBSD 10.99                   December 11, 2019                  NetBSD 10.99