106 lines
2.8 KiB
Perl
Executable File
106 lines
2.8 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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#scriptname=`basename $0`
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#vsname=`echo $scriptname | perl -ne '/^vserver_proc_VM_(.*)/ and print $1'`
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#if [ "$1" = "suggest" ]; then
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# ls -1 /etc/vservers
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# exit 0
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#elif [ -z "$vsname" ]; then
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# echo "Must be used with a vserver name; try '$0 suggest'" >&2
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# exit 2
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#fi
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use strict;
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use warnings;
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my $cmd = "ps -eo maj_flt,comm h";
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open PS, "$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[0] eq "config")
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{
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print <<END;
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graph_title Page faults by Process
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graph_args --base 1000
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graph_vlabel major page faults
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graph_category processes
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graph_info Shows number of major page faults caused by each process name
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END
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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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"$_.type DERIVE\n" .
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"$_.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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