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