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NAME
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stats, auxstats – display graphs of system activity
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SYNOPSIS
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stats [ −option ] [ machine[:path] ... ]
auxstats [ machine [ path ] ]
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DESCRIPTION
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Stats displays a rolling graph of various statistics collected
by the operating system and updated once per second. The statistics
may be from a remote machine or multiple machines, whose graphs
will appear in adjacent columns. The columns are labeled by the
machine names and the number of processors on the machine if it
is a multiprocessor.
Auxstats collects the machine statistics for display by stats.
With no arguments, it collects statistics from the local machine.
If machine is named, it executes ssh machine path; when ssh finishes,
auxstats sleeps for one minute and runs it again. The default
path is simply auxstats, but since some shells do not execute
any sort of user profile when
run as a non-login shell, it is often necessary to specify an
exact path.
The right mouse button presents a menu to enable and disable the
display of various statistics; by default, stats begins by showing
the load average on the executing machine.
The lower-case options choose the initial set to display:
b battery percentage battery life remaining.
c context number of process context switches per second.
e ether total number of packets sent and received per second.
E etherin,out
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number of packets sent and received per second, displayed as separate
graphs.
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f fault number of page faults per second.
i intr number of interrupts per second.
l load (default) system load average. The load is computed as a
running average of the number of processes ready to run, multiplied
by 1000. On most systems, it changes only every five seconds and
has limited accuracy.
m mem total pages of active memory. The graph displays the fraction
of the machine’s total memory in use.
n etherin,out,err
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number of packets sent and received per second, and total number
of errors, displayed as separate graphs.
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s syscall number of system calls per second.
w swap number of valid pages on the swap device. The swap is displayed
as a fraction of the number of swap pages configured by the machine.
8 802.11b display the signal strength detected by the 802.11b wireless
ether card; the value is usually below 50% unless the receiver
is in the same room as the transmitter, so a midrange value represents
a strong signal.
The graphs are plotted with time on the horizontal axis. The vertical
axes range from 0 to 1000*sleepsecs, multiplied by the number
of processors on the machine when appropriate. The only exceptions
are memory, and swap space, which display fractions of the total
available, system load, which displays a number between 0 and
1000, idle and intr,
which display percentages and the Ethernet error count, which
goes from 0 to 10.. If the value of the parameter is too large
for the visible range, its value is shown in decimal in the upper
left corner of the graph.
Upper-case options control details of the display. All graphs
are affected; there is no mechanism to affect only one graph.
−T sleepsecs
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Set the number of seconds between samples to sleepsecs (default
one second).
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−S scale
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Sets a scale factor for the displays. A value of 2, for example,
means that the highest value plotted will be twice as large as
the default.
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−L Plot all graphs with logarithmic y axes. The graph is plotted
so the maximum value that would be displayed on a linear graph
is 2/3 of the way up the y axis and the total range of the graph
is a factor of 1000; thus the y origin is 1/100 of the default
maximum value and the top of the graph is 10 times the default
maximum.
−Y If the display is large enough to show them, place value markers
along the y axes of the graphs. Since one set of markers serves
for all machines across the display, the values in the markers
disregard scaling factors due to multiple processors on the machines.
On a graph for a multiprocessor, the displayed values will be
larger than the
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markers indicate. The markers appear along the right, and the
markers show values appropriate to the rightmost machine; this
only matters for graphs such as memory that have machine-specific
maxima.
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Typing ‘q’ or DEL causes stats to exit.
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EXAMPLE
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Show the load, memory, interrupts, system calls, context switches,
and ethernet packets for the local machine, a remote BSD machine
daemon, and a remote Linux machine tux. Auxstats is not in tux’s
path, so the full path must be given.
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stats −lmisce `hostname` daemon \
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SOURCE
BUGS
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The auxstats binary needs read access to /dev/kmem in order to
collect network statistics on non-Linux systems. Typically this
can be arranged by setting the auxstat binary’s group to kmem
and then turning on its set-gid bit.
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