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SubjectRe: Swap performance statistics in 2.6 -- which /proc file has it?
Richard B. Johnson wrote:
>
> Hmm. I was talking about real stuff, not some theory.....

[...]

> Sun Microsystems Inc. SunOS 5.5.1 Generic May 1996
> # vmstat -a
> Usage: vmstat [-cisS] [disk ...] [interval [count]]
> # sar -B
> sar: illegal option -- B
> usage: sar [-ubdycwaqvmpgrkA][-o file] t [n]
> sar [-ubdycwaqvmpgrkA][-s hh:mm][-e hh:mm][-i ss][-f file]
> # sar -r
> sar: can't open /var/adm/sa/sa09
> No such file or directory
> # uname -a
> SunOS hal 5.5.1 Generic sun4m sparc SUNW,SPARCstation-5

[...]

> ... Guess not.

If you try this on a Linux system with the sysstat package installed you
might be surprised... (That's why i said the Linux part in the mentioned
book is outdated: it does not tell you that sar is available and recommends
to parse the proc files)

# dpkg -l sysstat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
ii sysstat 5.0.0-1 sar, iostat and mpstat - system performance

# vmstat -a
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free inact active si so bi bo in cs us sy id wa
0 0 0 113072 219600 173056 0 0 320 80 1055 203 6 2 78 14

# sar -B 60
Linux 2.6.0-test5-bk4 (duron) 12/10/03

11:13:24 pgpgin/s pgpgout/s fault/s majflt/s
11:14:24 0.00 3.80 13.38 0.00
Average: 0.00 3.80 13.38 0.00

# sar -r 60
Linux 2.6.0-test5-bk4 (duron) 12/10/03

11:14:53 kbmemfree kbmemused %memused kbbuffers kbcached kbswpfree
kbswpused %swpused kbswpcad
11:15:53 112488 532788 82.57 74000 260688 497972
0 0.00 0
Average: 112488 532788 82.57 74000 260688 497972
0 0.00 0


It that is sufficient information for your purposes i can not say, but for
most people that is all they will ever need.

Regards,
Dominik Kubla
--
Those who can make you believe absurdities can make you commit
atrocities. (Francois Marie Arouet aka Voltaire, 1694-1778)

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