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contrib-munin/plugins/system/total_by_process_
dipohl e777037d06 Plugin-Gallery: Get better 2nd level headings
Review of category processes, system, snmp
2017-02-24 19:50:15 +01:00

120 lines
3.1 KiB
Perl
Executable File

#!/usr/bin/perl
#
# Copyright 2012 Chris Wilson
# Copyright 2006 Holger Levsen
#
# This plugin monitors ALL processes on a system. No exceptions. It can
# produce very big graphs! But if you want to know which processes are
# killing your system by page faulting, without knowing what to monitor
# in advance, this can help; or in addition to one of the more specific
# plugins to monitor just Apache or MySQL, for example.
#
# Each counter is a DERIVE (difference since the last counter reading)
# of the number of major page faults, usually 4k each, read in by a
# process. Memory mapped files probably contribute to this. The process
# cannot continue until the page fault is served, so this is a
# high-priority read that usually indicates memory starvation.
# Processes with no page faults at all are ignored. Processes
# that die may not appear on the graph, and anyway their last chunk of
# CPU usage before they died is lost. You could modify this plugin to
# read SAR/psacct records if you care about that.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2 dated June,
# 1991.
use strict;
use warnings;
my $scriptname = $0;
$scriptname =~ s|.*/||;
my $fieldname = ($scriptname =~ /^total_by_process_(.*)_(.*)/) ? $1 : undef;
my $fieldtype = ($scriptname =~ /^total_by_process_(.*)_(.*)/) ? $2 : undef;
if (@ARGV and $ARGV[1] eq "suggest")
{
system("ps L | cut -d' ' -f1");
exit(0);
}
if (!$fieldname)
{
print STDERR "Must be used with a PS format specifier name; try '$0 suggest'";
exit(2);
}
unless ($fieldtype =~ /^(GAUGE|DERIVE)$/)
{
print STDERR "Unknown field type $fieldtype: should be GAUGE or DERIVE";
exit(2);
}
my $cmd = "ps -eo $fieldname,comm h";
open PS, "$cmd|" or die "Failed to run ps command: $cmd: $!";
# my $header_line = <PS>;
my %total_by_process;
while (<PS>)
{
my @fields = split;
my $value = $fields[0];
my $process = $fields[1];
# remove any / and everything after it from the process name,
# e.g. kworker/0:2 -> kworker
$process =~ s|/.*||;
# remove any . at the end of the name (why does this appear?)
# $process =~ s|\.$||;
# change any symbol that's not allowed in a munin variable name to _
$process =~ tr|a-zA-Z0-9|_|c;
$total_by_process{$process} += $value;
}
foreach my $process (keys %total_by_process)
{
# remove all processes with 0 faults
if (not $total_by_process{$process})
{
delete $total_by_process{$process};
}
}
close(PS);
if (@ARGV and $ARGV[1] == "config")
{
print <<END;
graph_title $fieldname by Process
graph_category processes
graph_info Shows total of $fieldname (reported by ps) for each process name
graph_vlabel $fieldname (from ps)
END
# graph_args --base 1000
# graph_vlabel seconds
my $stack = 0;
sub draw() { return $stack++ ? "STACK" : "AREA" }
print map
{
"$_.label $_\n" .
"$_.min 0\n" .
"$_.type $fieldtype\n" .
"$_.draw " . draw() . "\n"
} sort keys %total_by_process;
}
else
{
print map
{
"$_.value $total_by_process{$_}\n"
} sort keys %total_by_process;
}
exit(0);