mirror of
https://github.com/munin-monitoring/contrib.git
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98 lines
3.5 KiB
Perl
Executable File
98 lines
3.5 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# This plugin watches the Linux kernel SMAPS memory usage statistics
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# available in kernel revisions later than 2.6.14. It watches only the
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# Apache 2 processes, and creates averages, maximums and minimums for
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# a given moment in time for the shared size and the virtual size of
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# the processes. This is useful for estimating the constraints to give
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# to Apache2::SizeLimit.
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# Author: Kjetil Kjernsmo <kjetilk@opera.com>, based on work by William Viker
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# Copyright (C) 2007 Opera Software ASA
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#
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# Contibutors: Earle Nietzel <earle.nietzel@gmail.com>
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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; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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use strict;
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my $ret = undef;
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if (!eval "require Linux::Smaps;") {
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$ret = "Linux::Smaps not found, fix with cpan -i Linux::Smaps";
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}
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# allow process name and process user to be specified
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my $PNAME = exists $ENV{'pname'} ? $ENV{'pname'} : "httpd";
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my $PUSER = exists $ENV{'puser'} ? $ENV{'puser'} : "apache";
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if (defined(@ARGV) && ($ARGV[0] eq 'config')) {
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print "graph_title Apache Smaps\n";
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print "graph_args --base 1024 -l 0\n";
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print "graph_vlabel Bytes\n";
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print "graph_category webserver\n";
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print "graph_info This graph shows memory usage for each given process.\n";
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print "shr_max.label Shared memory max\n";
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print "shr_max.draw LINE2\n";
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print "shr_max.info Max shared memory.\n";
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print "shr_min.label Shared memory min\n";
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print "shr_min.draw LINE2\n";
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print "shr_min.info Minimum shared memory.\n";
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print "shr_avg.label Shared memory average\n";
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print "shr_avg.draw LINE2\n";
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print "shr_avg.info Average shared memory.\n";
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print "vsz_max.label Virtual memory max\n";
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print "vsz_max.draw LINE2\n";
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print "vsz_max.info Max Virtual memory.\n";
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print "vsz_min.label Virtual memory min\n";
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print "vsz_min.draw LINE2\n";
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print "vsz_min.info Minimum Virtual memory.\n";
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print "vsz_avg.label Virtual memory avg\n";
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print "vsz_avg.draw LINE2\n";
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print "vsz_avg.info Average Virtual memory.\n";
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exit(0);
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}
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my $i = 0;
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my $max_shared = 0;
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my $sum_shared = 0;
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my $min_shared = 1171541713117116171; # An insanely high number
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my $max_virt = 0;
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my $sum_virt = 0;
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my $min_virt = 1171541713117116171; # An insanely high number
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for my $pid (split(/\n/,`pgrep -x $PNAME -u $PUSER`)) {
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my $map = Linux::Smaps->new($pid);
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$i++;
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my $shared = $map->shared_clean + $map->shared_dirty;
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my $size = $map->size;
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$sum_shared += $shared;
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$max_shared = $shared if ($shared > $max_shared);
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$min_shared = $shared if ($shared < $min_shared);
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$sum_virt += $size;
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$max_virt = $size if ($size > $max_virt);
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$min_virt = $size if ($size < $min_virt);
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}
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# if no processes were found prevents divide by 0
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if ($i gt 0) {
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print "shr_max.value $max_shared\n";
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print "shr_min.value $min_shared\n";
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print "shr_avg.value ".$sum_shared/$i."\n";
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print "vsz_max.value $max_virt\n";
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print "vsz_min.value $min_virt\n";
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print "vsz_avg.value ".$sum_virt/$i."\n";
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}
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