Beware that the first line of statistics from vmstat are garbage.
Therefor anchal_khare post will not produce valid results.
Also beware that "vmstat 5" will not stop until it is interrupted or killed.
To get meaningful statistics from vmstat it must be run with at least two iterations:
Then take the statistics from the last line output.
A 5-second snapshot of a unix system would be biased by vmstat itself.
In practice you get a more meaningful statistics from say:
run every 20 mins.
I have MATLAB INSTALLED IN MY SUN MACHINE >>
WHENEVER I USE IT THE CPU USAGE SHOWS ABT 90%
Seeing the vmstat shows that system calls and context switch counters reach a very high value .
What are these counters ( Man pages do not give much info on that) ....
The only thing i can make out that... (1 Reply)
When I exeute vmstat (e.g. vmstat 30 2),
in some machines I get some wierd result as the first line.
like: -117% or 208% for CPU idle percentage.
But the second line is alright.
Could someone explain this please.
Thanks !
Chaadana (4 Replies)
Hi
I wanted to collect data by using vmstat -I 60 >xxxx.txt & using my own account
It was stopped by it self after 2 hours try again same result
We want to collect day date by succession how to collect data using vmstat for day
Thank you (2 Replies)
This is something nowbody around me can explain:
vmstat (-S 5) shows a huge number of PI but when I try to monitor it in parallel with iostat - there is no IO activity to be seen that would correspond to this.
I have 16G RAM and 32G swap file.
I'll really appreciate if somebody can explain it.... (9 Replies)
Hi everyone,
I need to see some VM manager performance/behavior information on some Linux boxes regarding pages scanned/activation of the paging algorithm in order to get an idea if a given server needs more memory and is actually paging. In Aix servers, by using the vmstat cmd you... (1 Reply)
I need some guidance on the differences in observations, not sure how significantly different are they.
Also, It would be nice to hear on the values and what the obvious tuning for performance missing.
Observation 1
ending vmstat -v 3948544 memory pages
ending vmstat -v ... (1 Reply)
I'm trying to parse vmstat output with this:
vmstat | nawk '/0/{printf "%s\ \n", $5}'
but output is different on two sparc Solaris 10 servers, one is missing line with 'free'.
why ? (3 Replies)
I m checking idle time using vmstat, below are the results
var=$(ssh wmtmgr@$hostname vmstat | tail -1 | awk '{print $15}')
89
and now im subtracting 89 with 100 & im getting expected results
expr 100 - $var
11
Now How can I get the result 11 in one line code? (4 Replies)
Discussion started by: sam@sam
4 Replies
LEARN ABOUT DEBIAN
sys::statistics::linux::pgswstats
Sys::Statistics::Linux::PgSwStats(3pm) User Contributed Perl Documentation Sys::Statistics::Linux::PgSwStats(3pm)NAME
Sys::Statistics::Linux::PgSwStats - Collect linux paging and swapping statistics.
SYNOPSIS
use Sys::Statistics::Linux::PgSwStats;
my $lxs = Sys::Statistics::Linux::PgSwStats->new;
$lxs->init;
sleep 1;
my $stat = $lxs->get;
Or
my $lxs = Sys::Statistics::Linux::PgSwStats->new(initfile => $file);
$lxs->init;
my $stat = $lxs->get;
DESCRIPTION
Sys::Statistics::Linux::PgSwStats gathers paging and swapping statistics from the virtual /proc filesystem (procfs).
For more information read the documentation of the front-end module Sys::Statistics::Linux.
PAGING AND SWAPPING STATISTICS
Generated by /proc/stat or /proc/vmstat.
pgpgin - Number of pages the system has paged in from disk per second.
pgpgout - Number of pages the system has paged out to disk per second.
pswpin - Number of pages the system has swapped in from disk per second.
pswpout - Number of pages the system has swapped out to disk per second.
The following statistics are only available by kernels from 2.6.
pgfault - Number of page faults the system has made per second (minor + major).
pgmajfault - Number of major faults per second the system required loading a memory page from disk.
METHODS
new()
Call "new()" to create a new object.
my $lxs = Sys::Statistics::Linux::PgSwStats->new;
Maybe you want to store/load the initial statistics to/from a file:
my $lxs = Sys::Statistics::Linux::PgSwStats->new(initfile => '/tmp/pgswstats.yml');
If you set "initfile" it's not necessary to call sleep before "get()".
It's also possible to set the path to the proc filesystem.
Sys::Statistics::Linux::PgSwStats->new(
files => {
# This is the default
path => '/proc',
stat => 'stat',
vmstat => 'vmstat',
}
);
init()
Call "init()" to initialize the statistics.
$lxs->init;
get()
Call "get()" to get the statistics. "get()" returns the statistics as a hash reference.
my $stat = $lxs->get;
raw()
Get raw values.
EXPORTS
No exports.
SEE ALSO proc(5)REPORTING BUGS
Please report all bugs to <jschulz.cpan(at)bloonix.de>.
AUTHOR
Jonny Schulz <jschulz.cpan(at)bloonix.de>.
COPYRIGHT
Copyright (c) 2006, 2007 by Jonny Schulz. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-03-09 Sys::Statistics::Linux::PgSwStats(3pm)