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Taken from Debian with small changes added

Authors: Craig Small <csmall@debian.org>, Brendan O'Dea <bod@debian.org>
This commit is contained in:
Jan Görig
2011-02-23 09:17:54 +01:00
parent 887c1b95c5
commit 039e2bb7df
12 changed files with 352 additions and 250 deletions
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48
vmstat.8
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@ -1,6 +1,6 @@
.\" This page Copyright (C) 1994 Henry Ware <al172@yfn.ysu.edu>
.\" Distributed under the GPL, Copyleft 1994.
.TH VMSTAT 8 "27 July 1994 " "Throatwobbler Ginkgo Labs" "Linux Administrator's Manual"
.TH VMSTAT 8 "2009 Jan 9" "Throatwobbler Ginkgo Labs" "Linux Administrator's Manual"
.SH NAME
vmstat \- Report virtual memory statistics
.SH SYNOPSIS
@ -22,32 +22,35 @@ vmstat \- Report virtual memory statistics
.RB [ "\-d"]
.br
.B vmstat
.RB [ "\-D"]
.br
.B vmstat
.RB [ "\-p disk partition"]
.br
.B vmstat
.RB [ "\-V" ]
.SH DESCRIPTION
\fBvmstat\fP reports information about processes, memory, paging,
block IO, traps, and cpu activity.
block IO, traps, disks and cpu activity.
The first report produced gives averages since the last reboot. Additional
reports give information on a sampling period of length \fIdelay\fP.
The process and memory reports are instantaneous in either case.
.SS Options
The \fB-a\fP switch displays active/inactive memory, given a 2.5.41 kernel or better.
The \fB\-a\fP switch displays active/inactive memory, given a 2.5.41 kernel or better.
.PP
The \fB-f\fP switch displays the number of forks since boot.
The \fB\-f\fP switch displays the number of forks since boot.
This includes the fork, vfork, and clone system calls, and is
equivalent to the total number of tasks created. Each process
is represented by one or more tasks, depending on thread usage.
This display does not repeat.
.PP
The \fB-m\fP displays slabinfo.
The \fB\-m\fP displays slabinfo.
.PP
The \fB-n\fP switch causes the header to be displayed only once rather than periodically.
The \fB\-n\fP switch causes the header to be displayed only once rather than periodically.
.PP
The \fB-s\fP switch displays a table of various event counters
The \fB\-s\fP switch displays a table of various event counters
and memory statistics. This display does not repeat.
.PP
.I delay
@ -58,13 +61,15 @@ only one report is printed with the average values since boot.
is the number of updates. If no count is specified and delay is
defined, \fIcount\fP defaults to infinity.
.PP
The \fB-d\fP reports disk statistics (2.5.70 or above required)
The \fB\-d\fP reports disk statistics (2.5.70 or above required)
.PP
The \fB-p\fP followed by some partition name for detailed statistics (2.5.70 or above required)
The \fB-D\fP reports some summary statistics about disk activity.
.PP
The \fB-S\fP followed by k or K or m or M switches outputs between 1000, 1024, 1000000, or 1048576 bytes
The \fB\-p\fP followed by some partition name for detailed statistics (2.5.70 or above required)
.PP
The \fB-V\fP switch results in displaying version information.
The \fB\-S\fP followed by k or K or m or M switches outputs between 1000, 1024, 1000000, or 1048576 bytes
.PP
The \fB\-V\fP switch results in displaying version information.
.PP
.SH FIELD DESCRIPTION FOR VM MODE
.SS
@ -81,8 +86,8 @@ swpd: the amount of virtual memory used.
free: the amount of idle memory.
buff: the amount of memory used as buffers.
cache: the amount of memory used as cache.
inact: the amount of inactive memory. (-a option)
active: the amount of active memory. (-a option)
inact: the amount of inactive memory. (\-a option)
active: the amount of active memory. (\-a option)
.fi
.PP
.SS
@ -104,18 +109,18 @@ bo: Blocks sent to a block device (blocks/s).
.nf
in: The number of interrupts per second, including the clock.
cs: The number of context switches per second.
.if
.fi
.PP
.SS
.B "CPU "
These are percentages of total CPU time.
.nf
us: Time spent running non-kernel code. (user time, including nice time)
us: Time spent running non\-kernel code. (user time, including nice time)
sy: Time spent running kernel code. (system time)
id: Time spent idle. Prior to Linux 2.5.41, this includes IO-wait time.
id: Time spent idle. Prior to Linux 2.5.41, this includes IO\-wait time.
wa: Time spent waiting for IO. Prior to Linux 2.5.41, included in idle.
st: Time stolen from a virtual machine. Prior to Linux 2.6.11, unknown.
.fi
.PP
.SH FIELD DESCRIPTION FOR DISK MODE
.SS
@ -161,8 +166,6 @@ num: Number of currently active objects
total: Total number of available objects
size: Size of each object
pages: Number of pages with at least one active object
totpages: Total number of allocated pages
pslab: Number of pages per slab
.fi
.SH NOTES
@ -188,7 +191,12 @@ vmstat uses slabinfo 1.1 FIXME
.fi
.SH "SEE ALSO"
iostat(1), sar(1), mpstat(1), ps(1), top(1), free(1)
.BR iostat (1),
.BR sar (1),
.BR mpstat (1),
.BR ps (1),
.BR top (1),
.BR free (1)
.PP
.SH BUGS
Does not tabulate the block io per device or count the number of system calls.