Annotation of src/usr.bin/systat/systat.1, Revision 1.102
1.102 ! dlg 1: .\" $OpenBSD: systat.1,v 1.101 2015/03/12 01:03:00 claudio Exp $
1.2 deraadt 2: .\" $NetBSD: systat.1,v 1.6 1996/05/10 23:16:39 thorpej Exp $
1.1 deraadt 3: .\"
4: .\" Copyright (c) 1985, 1990, 1993
5: .\" The Regents of the University of California. All rights reserved.
6: .\"
7: .\" Redistribution and use in source and binary forms, with or without
8: .\" modification, are permitted provided that the following conditions
9: .\" are met:
10: .\" 1. Redistributions of source code must retain the above copyright
11: .\" notice, this list of conditions and the following disclaimer.
12: .\" 2. Redistributions in binary form must reproduce the above copyright
13: .\" notice, this list of conditions and the following disclaimer in the
14: .\" documentation and/or other materials provided with the distribution.
1.28 millert 15: .\" 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: .\" may be used to endorse or promote products derived from this software
17: .\" without specific prior written permission.
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19: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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31: .\" @(#)systat.1 8.2 (Berkeley) 12/30/93
32: .\"
1.102 ! dlg 33: .Dd $Mdocdate: March 12 2015 $
1.1 deraadt 34: .Dt SYSTAT 1
1.12 aaron 35: .Os
1.1 deraadt 36: .Sh NAME
37: .Nm systat
1.41 jmc 38: .Nd display system statistics
1.1 deraadt 39: .Sh SYNOPSIS
40: .Nm systat
1.96 reyk 41: .Op Fl aBbiNn
1.62 matthieu 42: .Op Fl d Ar count
43: .Op Fl s Ar delay
44: .Op Fl w Ar width
45: .Op Ar view
46: .Op Ar delay
1.1 deraadt 47: .Sh DESCRIPTION
1.13 aaron 48: .Nm
1.73 jmc 49: displays various system statistics in a screen-oriented fashion
50: using the
51: .Xr curses 3
52: screen display library.
1.1 deraadt 53: .Pp
54: While
1.13 aaron 55: .Nm
1.86 lum 56: is running, the screen is divided into different areas.
57: The top line displays the current number of users, the
58: three system load average figures over the last 1, 5, and
59: 15 minute intervals, and the system time.
1.73 jmc 60: The bottom line of the screen is reserved for
61: user input and error messages.
62: The information displayed in the rest of the screen
63: comprises a
64: .Em view ,
65: and is the main interface for
1.76 jmc 66: displaying different types of system statistics.
1.73 jmc 67: The
68: .Ic vmstat
69: view is the default.
1.77 jmc 70: .Pp
71: Certain information may be discarded when the screen size is
72: insufficient for display.
73: For example, on a machine with 10 drives the
74: .Ic iostat
75: bar graph displays only 3 drives on a 24 line terminal.
1.76 jmc 76: .\".Pp
77: .\"Input is interpreted at two different levels.
78: .\"A
79: .\".Dq global
80: .\"command interpreter processes all keyboard input.
81: .\"If this command interpreter fails to recognize a command, the
82: .\"input line is passed to a per-display command interpreter.
83: .\"This allows each display to have certain display-specific commands.
1.1 deraadt 84: .Pp
1.16 aaron 85: The options are as follows:
1.62 matthieu 86: .Bl -tag -width Ds
1.64 jmc 87: .It Fl a
1.62 matthieu 88: Display all lines.
1.96 reyk 89: .It Fl B
90: Raw, non-interactive mode.
91: The default is to exit after two screen updates,
92: with statistics only ever displayed once.
93: Useful for views such as
94: .Ic cpu ,
95: where initial calculations are useless.
1.62 matthieu 96: .It Fl b
1.88 lum 97: Raw, non-interactive mode.
1.96 reyk 98: The default is to exit after one screen update,
99: with statistics displayed every update.
1.62 matthieu 100: .It Fl d Ar count
101: Exit after
102: .Ar count
103: screen updates.
104: .It Fl i
105: Interactive mode.
1.81 sthen 106: .It Fl N
107: Resolve network addresses to names.
108: This is the opposite of the
109: .Fl n
110: option.
1.34 itojun 111: .It Fl n
1.73 jmc 112: Do not try to reverse map IP addresses.
1.81 sthen 113: This is the default.
1.62 matthieu 114: .It Fl s Ar delay
1.31 jmc 115: Specifies the screen refresh time interval in seconds.
1.62 matthieu 116: This option is overridden by the final
1.64 jmc 117: .Ar delay
1.73 jmc 118: argument, if given.
1.31 jmc 119: The default interval is 5 seconds.
1.62 matthieu 120: .It Fl w Ar width
1.94 okan 121: Specifies the maximum width of the output in raw, non-interactive mode.
1.62 matthieu 122: .It Ar view
1.1 deraadt 123: The
1.62 matthieu 124: .Ar view
1.2 deraadt 125: argument expects to be one of:
1.62 matthieu 126: .Ic vmstat ,
1.1 deraadt 127: .Ic pigs ,
1.62 matthieu 128: .Ic ifstat ,
1.1 deraadt 129: .Ic iostat ,
1.49 deraadt 130: .Ic sensors ,
1.1 deraadt 131: .Ic mbufs ,
1.62 matthieu 132: .Ic netstat ,
133: .Ic swap ,
134: .Ic states ,
135: .Ic rules ,
1.68 canacar 136: .Ic queues ,
1.71 canacar 137: .Ic pf ,
138: .Ic pool ,
1.102 ! dlg 139: .Ic pcache ,
1.71 canacar 140: .Ic malloc ,
1.80 jmc 141: .Ic buckets ,
142: .Ic nfsclient ,
1.96 reyk 143: .Ic nfsserver ,
1.1 deraadt 144: or
1.96 reyk 145: .Ic cpu .
1.2 deraadt 146: These displays can also be requested interactively and are described in
1.1 deraadt 147: full detail below.
1.62 matthieu 148: .Ar view
1.53 jmc 149: may be abbreviated to the minimum unambiguous prefix;
150: for example,
1.50 jmc 151: .Dq io
152: for
153: .Dq iostat .
1.62 matthieu 154: .It Ar delay
1.1 deraadt 155: The
1.62 matthieu 156: .Ar delay
1.73 jmc 157: argument specifies the screen refresh time interval in seconds.
158: This is provided for backwards compatibility, and overrides any
1.31 jmc 159: interval specified with the
1.73 jmc 160: .Fl s
1.2 deraadt 161: flag.
1.31 jmc 162: The default interval is 5 seconds.
1.1 deraadt 163: .El
164: .Pp
165: Certain characters cause immediate action by
1.61 jmc 166: .Nm .
1.63 sobrado 167: These are:
1.1 deraadt 168: .Bl -tag -width Fl
169: .It Ic \&:
170: Move the cursor to the command line and interpret the input
1.16 aaron 171: line typed as a command.
172: While entering a command the
1.1 deraadt 173: current character erase, word erase, and line kill characters
174: may be used.
1.69 canacar 175: .It Ic o
176: Select the next ordering which sorts the rows according to a
1.70 jmc 177: combination of columns.
178: Available orderings depend on the view.
179: Not all views support orderings.
1.66 canacar 180: .It Ic p
181: Pause
182: .Nm .
1.59 jmc 183: .It Ic q
1.73 jmc 184: Quit
1.66 canacar 185: .Nm .
1.69 canacar 186: .It Ic r
187: Reverse the selected ordering if supported by the view.
1.91 mpf 188: .It Ic \&,
189: Print numbers with thousand separators, where applicable.
1.100 bentley 190: .It Ic ^A | Aq Ic Home
1.66 canacar 191: Jump to the beginning of the current view.
1.100 bentley 192: .It Ic ^B | Aq Ic right arrow
1.84 jmc 193: Select the previous view.
1.100 bentley 194: .It Ic ^E | Aq Ic End
1.66 canacar 195: Jump to the end of the current view.
1.100 bentley 196: .It Ic ^F | Aq Ic left arrow
1.66 canacar 197: Select the next view.
198: .It Ic ^G
199: Print the name of the current
1.73 jmc 200: view being shown and the refresh interval.
1.66 canacar 201: .It Ic ^L
202: Refresh the screen.
1.100 bentley 203: .It Ic ^N | Aq Ic down arrow
1.66 canacar 204: Scroll current view down by one line.
1.100 bentley 205: .It Ic ^P | Aq Ic up arrow
1.66 canacar 206: Scroll current view up by one line.
1.100 bentley 207: .It Ic ^V | Aq Ic Page Down
1.66 canacar 208: Scroll current view down by one page.
1.100 bentley 209: .It Ic Alt-V | Aq Ic Page Up
1.66 canacar 210: Scroll current view up by one page.
211: .It Ic ^Z
212: Suspend
1.59 jmc 213: .Nm .
1.1 deraadt 214: .El
215: .Pp
1.13 aaron 216: The following commands are interpreted by the
217: .Dq global
1.1 deraadt 218: command interpreter.
219: .Bl -tag -width Fl
220: .It Ic help
1.73 jmc 221: Print the names of the available views on the command line.
1.52 jmc 222: .It Ic quit
1.73 jmc 223: Quit
1.61 jmc 224: .Nm .
1.52 jmc 225: (This may be abbreviated to
226: .Ic q . )
1.1 deraadt 227: .It Ic stop
228: Stop refreshing the screen.
229: .It Xo
230: .Op Ic start
231: .Op Ar number
232: .Xc
1.16 aaron 233: Start (continue) refreshing the screen.
234: If a second, numeric,
1.1 deraadt 235: argument is provided it is interpreted as a refresh interval
236: (in seconds).
237: Supplying only a number will set the refresh interval to this
238: value.
239: .El
240: .Pp
1.73 jmc 241: .Ar view
1.53 jmc 242: may be abbreviated to the minimum unambiguous prefix.
1.73 jmc 243: The available views are:
1.52 jmc 244: .Bl -tag -width "netstatXXX"
1.71 canacar 245: .It Ic buckets
246: Display kernel
247: .Xr malloc 9
248: bucket statistics similar to the output of
249: .Cm vmstat Fl m .
1.96 reyk 250: .It Ic cpu
251: Display information about the average usage of each CPU,
252: similar to the output provided by
253: .Xr top 1 .
1.52 jmc 254: .It Ic ifstat
1.73 jmc 255: Display interface statistics.
1.52 jmc 256: The
257: .Dq State
258: column has the format
259: .Sm off
260: .Xo
1.100 bentley 261: .Cm up | dn
262: .Bq : Cm U | D .
1.52 jmc 263: .Xc
264: .Sm on
265: .Sq up
266: and
267: .Sq dn
268: represent whether the interface is up or down.
269: .Sq U
270: and
271: .Sq D
272: represent whether the interface is connected or not;
273: in the case of
274: .Xr carp 4
275: interfaces, whether the interface is in master or backup state, respectively.
1.92 lum 276: .Pp
1.91 mpf 277: The character
278: .Ic B
279: changes the counter view between bytes and bits.
1.92 lum 280: Pressing
281: .Ic b
282: displays statistics as calculated from boot time.
283: .Ic r
284: changes the counters to show their totals as calculated
285: between display refreshes.
286: .Ic t
287: changes the counters to show the average per second over
288: the display refresh interval;
289: this is the default.
1.52 jmc 290: .It Ic iostat
1.73 jmc 291: Display statistics about disk throughput.
1.52 jmc 292: Statistics
293: on disk throughput show, for each drive, data transferred in kilobytes,
294: number of disk transactions performed, and time spent in disk accesses
1.56 otto 295: (in fractions of a second).
1.71 canacar 296: .It Ic malloc
297: Display kernel
298: .Xr malloc 9
299: type statistics similar to the output of
300: .Cm vmstat Fl m .
301: Available orderings are:
302: .Ic name ,
303: .Ic inuse ,
304: .Ic memuse ,
305: and
306: .Ic requests .
1.72 jmc 307: .It Ic mbufs
1.78 canacar 308: Display mbuf usage information from kernel pools
309: and mbuf cluster pool statistics of each network interface.
1.52 jmc 310: .It Ic netstat
1.73 jmc 311: Display network connections.
1.93 okan 312: Each address
313: is displayed numerically in the format
314: .Dq host:port .
1.52 jmc 315: By default, network servers awaiting requests are not displayed.
1.93 okan 316: It is also possible to have addresses displayed symbolically,
317: when possible, and limit the display to a set of protocols
318: (the minimum unambiguous prefix may be supplied):
319: .Bl -tag -width Ar
320: .It Cm all
321: Toggle the displaying of server processes awaiting requests (this
322: is the equivalent of the
323: .Fl a
324: flag to
325: .Xr netstat 1 ) .
326: .It Cm names
327: Display network addresses symbolically.
328: .It Cm numbers
329: Display network addresses numerically.
330: .It Cm reset
331: Reset matching mechanisms to the default.
1.76 jmc 332: .\".It Cm show Oo
1.100 bentley 333: .\".Ar protocols | ports | hosts
1.76 jmc 334: .\".Oc
335: .\"Show, on the command line, the currently selected protocols,
336: .\"hosts, and ports.
337: .\"Protocols, hosts and ports which are being ignored are prefixed with a
338: .\".Ql \&! .
339: .\"If an argument is supplied to
340: .\".Cm show ,
341: .\"then only the requested information will be displayed.
1.101 claudio 342: .It Cm tcp | udp | other
1.93 okan 343: Display only network connections using the indicated protocol.
344: .El
1.79 jasper 345: .It Ic nfsclient
1.80 jmc 346: Display statistics about NFS client activity.
1.84 jmc 347: Output resembles
1.79 jasper 348: .Cm nfsstat Fl c .
349: .It Ic nfsserver
1.80 jmc 350: Display statistics about NFS server activity.
1.84 jmc 351: Output resembles
1.79 jasper 352: .Cm nfsstat Fl s .
1.62 matthieu 353: .It Ic pf
1.64 jmc 354: Display filter information about
1.62 matthieu 355: .Xr pf 4 ,
356: similar to the output of
1.64 jmc 357: .Cm pfctl Fl s Cm info
1.62 matthieu 358: option.
1.1 deraadt 359: .It Ic pigs
1.73 jmc 360: Display those processes resident in main
1.1 deraadt 361: memory and getting the
1.73 jmc 362: largest portion of the processor.
1.1 deraadt 363: When less than 100% of the
364: processor is scheduled to user processes, the remaining time
1.13 aaron 365: is accounted to the
366: .Dq idle
367: process.
1.68 canacar 368: .It Ic pool
369: Display kernel
370: .Xr pool 9
371: statistics similar to the output of
372: .Cm vmstat Fl m .
1.69 canacar 373: Available orderings are:
1.75 canacar 374: .Ic name ,
375: .Ic requests ,
1.76 jmc 376: .Ic size ,
1.69 canacar 377: and
1.75 canacar 378: .Ic number of pages .
1.98 mpi 379: .Pp
380: By default only the statistics of active pools are displayed but pressing
381: .Ic A
382: changes the view to show all of them.
1.102 ! dlg 383: .It Ic pcache
! 384: Display kernel
! 385: .Xr pool 9
! 386: per CPU cache statistics.
1.62 matthieu 387: .It Ic queues
1.97 henning 388: Display statistics about the active queues,
389: similar to the output of
1.62 matthieu 390: .Cm pfctl Fl s Cm queue .
391: .It Ic rules
1.64 jmc 392: Display pf rules statistics, similar to the output of
1.62 matthieu 393: .Cm pfctl Fl s Cm rules .
1.52 jmc 394: .It Ic sensors
1.73 jmc 395: Display the current values of available hardware sensors,
1.52 jmc 396: in a format similar to that of
397: .Xr sysctl 8 .
1.62 matthieu 398: .It Ic states
1.64 jmc 399: Display pf states statistics, similar to the output of
1.62 matthieu 400: .Cm pfctl Fl s Cm states .
1.69 canacar 401: Available orderings are:
402: .Ic none ,
403: .Ic bytes ,
404: .Ic expiry ,
405: .Ic packets ,
406: .Ic age ,
407: .Ic source address ,
408: .Ic source port ,
409: .Ic destination address ,
410: .Ic destination port ,
411: .Ic rate ,
412: and
413: .Ic peak
414: columns.
1.1 deraadt 415: .It Ic swap
1.12 aaron 416: Show information about swap space usage on all the
1.1 deraadt 417: swap areas compiled into the kernel.
418: The first column is the device name of the partition.
419: The next column is the total space available in the partition.
1.12 aaron 420: The
1.1 deraadt 421: .Ar Used
422: column indicates the total blocks used so far;
423: the graph shows the percentage of space in use on each partition.
1.8 aaron 424: If there is more than one swap partition in use,
1.1 deraadt 425: a total line is also shown.
1.8 aaron 426: Areas known to the kernel but not in use are shown as not available.
1.1 deraadt 427: .It Ic vmstat
428: Take over the entire display and show a (rather crowded) compendium
429: of statistics related to virtual memory usage, process scheduling,
1.84 jmc 430: device interrupts, system name translation caching, disk I/O, etc.
1.73 jmc 431: This view is the default.
1.1 deraadt 432: .Pp
1.86 lum 433: Below the top line are statistics on memory utilization.
1.1 deraadt 434: The first row of the table reports memory usage only among
1.8 aaron 435: active processes, that is, processes that have run in the previous
1.1 deraadt 436: twenty seconds.
437: The second row reports on memory usage of all processes.
1.47 millert 438: The first column reports on the amount of physical memory
1.1 deraadt 439: claimed by processes.
1.29 jmc 440: The second column reports the same figure for
1.47 millert 441: virtual memory, that is, the amount of memory that would be
442: needed if all processes were resident at the same time.
443: Finally, the last column shows the amount of physical memory
1.1 deraadt 444: on the free list.
445: .Pp
1.5 flipk 446: Below the memory display is a list of the average number of processes
1.13 aaron 447: (over the last refresh interval) that are runnable
448: .Pq Sq r ,
449: in disk wait other than paging
450: .Pq Sq d ,
451: sleeping
452: .Pq Sq s ,
453: and swapped out but desiring to run
454: .Pq Sq w .
1.1 deraadt 455: Below the queue length listing is a numerical listing and
456: a bar graph showing the amount of
1.40 dlg 457: interrupt (shown as
1.100 bentley 458: .Ql | ) ,
1.16 aaron 459: system (shown as
460: .Ql = ) ,
461: user (shown as
1.100 bentley 462: .Ql > ) ,
1.16 aaron 463: nice (shown as
464: .Ql - ) ,
465: and idle time (shown as
1.29 jmc 466: .Ql \ \& ) .
1.1 deraadt 467: .Pp
1.12 aaron 468: To the right of the Proc display are statistics about
1.16 aaron 469: Context switches
470: .Pq Dq Csw ,
471: Traps
472: .Pq Dq Trp ,
473: Syscalls
474: .Pq Dq Sys ,
475: Interrupts
476: .Pq Dq Int ,
477: Soft interrupts
478: .Pq Dq Sof ,
479: and Faults
480: .Pq Dq Flt
1.7 deraadt 481: which have occurred during the last refresh interval.
1.5 flipk 482: .Pp
1.83 jmc 483: Below the CPU usage graph are statistics on name translations.
1.1 deraadt 484: It lists the number of names translated in the previous interval,
485: the number and percentage of the translations that were
486: handled by the system wide name translation cache, and
487: the number and percentage of the translations that were
488: handled by the per process name translation cache.
489: .Pp
1.5 flipk 490: At the bottom left is the disk usage display.
491: It reports the number of seeks, transfers, number
492: of kilobyte blocks transferred per second averaged over the
1.90 lum 493: refresh period of the display, and
1.5 flipk 494: the time spent in disk accesses.
495: .Pp
1.1 deraadt 496: Under the date in the upper right hand quadrant are statistics
497: on paging and swapping activity.
498: The first two columns report the average number of pages
499: brought in and out per second over the last refresh interval
500: due to page faults and the paging daemon.
501: The third and fourth columns report the average number of pages
502: brought in and out per second over the last refresh interval
503: due to swap requests initiated by the scheduler.
504: The first row of the display shows the average
1.8 aaron 505: number of disk transfers per second over the last refresh interval.
506: The second row of the display shows the average
1.1 deraadt 507: number of pages transferred per second over the last refresh interval.
508: .Pp
509: Running down the right hand side of the display is a breakdown
510: of the interrupts being handled by the system.
511: At the top of the list is the total interrupts per second
512: over the time interval.
513: The rest of the column breaks down the total on a device
514: by device basis.
515: Only devices that have interrupted at least once since boot time are shown.
1.83 jmc 516: .Pp
1.89 lum 517: Below the Interrupts display are
518: the average number of input and output packets per second
519: for all interfaces over the last refresh interval.
1.5 flipk 520: .Pp
521: Below the SWAPPING display and slightly to the left of the Interrupts
1.18 aaron 522: display is a list of virtual memory statistics.
523: The abbreviations are:
1.36 jmc 524: .Pp
1.38 niallo 525: .Bl -tag -compact -width "kmapentXX" -offset indent
1.21 deraadt 526: .It forks
527: process forks
528: .It fkppw
529: forks where parent waits
530: .It fksvm
531: forks where vmspace is shared
532: .It pwait
533: fault had to wait on a page
534: .It relck
535: fault relock called
536: .It rlkok
537: fault relock is successful
538: .It noram
539: faults out of ram
540: .It ndcpy
541: number of times fault clears "need copy"
542: .It fltcp
543: number of times fault promotes with copy
544: .It zfod
545: fault promotes with zerofill
1.5 flipk 546: .It cow
1.21 deraadt 547: number of times fault anon cow
548: .It fmin
549: min number of free pages
550: .It ftarg
551: target number of free pages
552: .It itarg
553: target number of inactive pages
554: .It wired
555: wired pages
1.25 deraadt 556: .It pdfre
1.21 deraadt 557: pages daemon freed since boot
558: .It pdscn
559: pages daemon scanned since boot
1.38 niallo 560: .It pzidle
561: number of zeroed pages
562: .It kmapent
563: number of kernel map entries
1.5 flipk 564: .El
1.35 markus 565: .El
1.74 jmc 566: .\".Pp
567: .\"The following commands are specific to the
568: .\".Ic vmstat
569: .\"and
570: .\".Ic ifstat
571: .\"views; the minimum unambiguous prefix may be supplied.
572: .\".Pp
573: .\".Bl -tag -width Ds -compact
574: .\".It Cm boot
575: .\"Display cumulative statistics since the system was booted.
576: .\".It Cm run
577: .\"Display statistics as a running total from the point this
578: .\"command is given.
579: .\".It Cm time
580: .\"Display statistics averaged over the refresh interval (the default).
581: .\".It Cm zero
582: .\"Reset running statistics to zero.
583: .\".El
584: .\".Pp
585: .\"The following commands are common to each view which shows
586: .\"information about disk drives.
587: .\"These commands are used to select a set of drives to report on,
588: .\"should a system have more drives configured
589: .\"than can normally be displayed on the screen.
590: .\".Pp
591: .\".Bl -tag -width Tx -compact
592: .\".It Cm display Op Ar drives
593: .\"Display information about the drives indicated.
594: .\"Multiple drives may be specified, separated by spaces.
595: .\".It Cm ignore Op Ar drives
596: .\"Do not display information about the drives indicated.
597: .\"Multiple drives may be specified, separated by spaces.
598: .\".El
1.1 deraadt 599: .Sh FILES
1.99 schwarze 600: .Bl -tag -width "/etc/servicesXXX" -compact
1.1 deraadt 601: .It Pa /etc/hosts
1.73 jmc 602: Host names.
1.62 matthieu 603: .It Pa /etc/pf.conf
1.73 jmc 604: .Xr pf 4
605: configuration.
1.1 deraadt 606: .It Pa /etc/services
1.73 jmc 607: Port names.
1.1 deraadt 608: .El
1.15 aaron 609: .Sh SEE ALSO
1.85 jmc 610: .Xr fstat 1 ,
1.15 aaron 611: .Xr kill 1 ,
1.37 jmc 612: .Xr netstat 1 ,
1.79 jasper 613: .Xr nfsstat 1 ,
1.15 aaron 614: .Xr ps 1 ,
615: .Xr top 1 ,
1.37 jmc 616: .Xr iostat 8 ,
1.62 matthieu 617: .Xr pfctl 8 ,
1.37 jmc 618: .Xr pstat 8 ,
619: .Xr renice 8 ,
1.48 deanna 620: .Xr sysctl 8 ,
1.37 jmc 621: .Xr vmstat 8
1.1 deraadt 622: .Sh HISTORY
623: The
1.13 aaron 624: .Nm
1.73 jmc 625: program first appeared in
1.1 deraadt 626: .Bx 4.3 .
627: .Sh BUGS
628: Certain displays presume a minimum of 80 characters per line.
629: The
630: .Ic vmstat
631: display looks out of place because it is (it was added in as
632: a separate display rather than created as a new program).