top(1): Rework DESCRIPTION OF MEMORY section.
Due to markup issues, the DESCRIPTION OF MEMORY section is rather unreadable; rework it a bit, using subsections for different lines of the top output, and move it closer to description. While here, pet manlint ordering other sections as expected. Submitted by: Yuri Pankov <yuripv@yuripv.net> Reviewed by: eadler Approved by: re (gjb), krion (mentor) Differential Revision: https://reviews.freebsd.org/D17369
This commit is contained in:
Mateusz Piotrowski
parent
7e02ad0769
commit
fab44dc358
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=339080
@ -1,5 +1,5 @@
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.\" $FreeBSD$
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.Dd June 9, 2018
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.Dd October 2, 2018
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.Dt TOP 1
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.Os
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.Sh NAME
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@ -359,22 +359,67 @@ the state column will report the name of the event or lock on which the
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process is waiting.
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Lock names are prefixed with an asterisk \*(lq*\*(rq while sleep events
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are not.
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.Sh AUTHORS
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.An William LeFebvre, EECS Department, Northwestern University
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.Sh BUGS
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The command name for swapped processes should be tracked down, but this
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would make the program run slower.
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.Sh DESCRIPTION OF MEMORY
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.Bd -literal
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Mem: 61M Active, 86M Inact, 368K Laundry, 22G Wired, 102G Free
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ARC: 15G Total, 9303M MFU, 6155M MRU, 1464K Anon, 98M Header, 35M Other
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15G Compressed, 27G Uncompressed, 1.75:1 Ratio, 174M Overhead
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Swap: 4096M Total, 532M Free, 13% Inuse, 80K In, 104K Out
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.Ed
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.Ss Physical Memory Stats
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.Bl -tag -width "Uncompressed" -compact
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.It Em Active
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number of bytes active
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.It Em Inact
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number of clean bytes inactive
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.It Em Laundry
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number of dirty bytes queued for laundering
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.It Em Wired
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number of bytes wired down, including IO-level cached file data pages
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.It Em Buf
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number of bytes used for IO-level disk caching
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.It Em Free
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number of bytes free
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.El
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.Ss ZFS ARC Stats
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These stats are only displayed when the ARC is in use.
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.Pp
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As with
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.Xr ps 1 ,
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things can change while
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.Nm
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is collecting information for an update.
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The picture it gives is only a
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close approximation to reality.
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.Bl -tag -width "Uncompressed" -compact
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.It Em Total
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number of wired bytes used for the ZFS ARC
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.It Em MRU
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number of ARC bytes holding most recently used data
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.It Em MFU
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number of ARC bytes holding most frequently used data
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.It Em Anon
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number of ARC bytes holding in flight data
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.It Em Header
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number of ARC bytes holding headers
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.It Em Other
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miscellaneous ARC bytes
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.It Em Compressed
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bytes of memory used by ARC caches
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.It Em Uncompressed
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bytes of data stored in ARC caches before compression
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.It Em Ratio
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compression ratio of data cached in the ARC
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.El
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.Ss Swap Stats
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.Bl -tag -width "Uncompressed" -compact
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.It Em Total
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total available swap usage
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.It Em Free
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total free swap usage
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.It Em Inuse
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swap usage
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.It Em \&In
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bytes paged in from swap devices (last interval)
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.It Em Out
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bytes paged out to swap devices (last interval)
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.El
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.Sh ENVIRONMENT
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.Bl -tag -width TOP -compact
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.It Pa TOP
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.Bl -tag -width "Uncompressed"
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.It Ev TOP
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Default set of arguments to
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.Nm .
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.El
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@ -386,54 +431,15 @@ Default set of arguments to
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.Xr humanize_number 3 ,
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.Xr mem 4 ,
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.Xr renice 8
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.Sh DESCRIPTION OF MEMORY
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Mem: 61M Active, 86M Inact, 368K Laundry, 22G Wired, 102G Free
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ARC: 15G Total, 9303M MFU, 6155M MRU, 1464K Anon, 98M Header, 35M Other
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15G Compressed, 27G Uncompressed, 1.75:1 Ratio, 174M Overhead
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Swap: 4096M Total, 532M Free, 13% Inuse, 80K In, 104K Out
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.Sh Physical Memory Stats
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.Bl -tag -width indent
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.It Active:
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number of bytes active
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.It Inact:
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number of clean bytes inactive
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.It Laundry:
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number of dirty bytes queued for laundering
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.It Wired:
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number of bytes wired down, including IO-level cached file data pages
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.It Buf:
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number of bytes used for IO-level disk caching
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.It Free:
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number of bytes free
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.It ZFS ARC Stats
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These stats are only displayed when the ARC is in use.
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.It Total:
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number of wired bytes used for the ZFS ARC
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.It MRU:
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number of ARC bytes holding most recently used data
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.It MFU:
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number of ARC bytes holding most frequently used data
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.It Anon:
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number of ARC bytes holding in flight data
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.It Header:
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number of ARC bytes holding headers
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.It Other:
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miscellaneous ARC bytes
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.It Compressed:
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bytes of memory used by ARC caches
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.It Uncompressed:
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bytes of data stored in ARC caches before compression
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.It Ratio:
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compression ratio of data cached in the ARC
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.It Swap Stats
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.It Total:
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total available swap usage
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.It Free:
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total free swap usage
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.It Inuse:
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swap usage
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.It In:
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bytes paged in from swap devices (last interval)
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.It Out:
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bytes paged out to swap devices (last interval)
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.El
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.Sh AUTHORS
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.An William LeFebvre, EECS Department, Northwestern University
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.Sh BUGS
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The command name for swapped processes should be tracked down, but this
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would make the program run slower.
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.Pp
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As with
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.Xr ps 1 ,
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things can change while
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.Nm
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is collecting information for an update.
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The picture it gives is only a close approximation to reality.
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