103 lines
2.8 KiB
Ruby
Executable File
103 lines
2.8 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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# thin_peak_memory -
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# A munin plugin for Linux to monitor the maximum memory size
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# that an each individual thin process has reached
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#
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# For Linux ONLY !
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# DOES NOT WORK on OSX, Solaris or BSD.
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# only linux, because this script relies on proc filesystem
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#
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# Author:
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# Frederico de Souza Araujo - fred.the.master@gmail.com
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# http://www.frederico-araujo.com
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#
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# Based on:
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# thin_process_memory -
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# A munin plugin to monitor memory size of
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# each individual thin process
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# by Ben VandenBos and Avvo, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2
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# as published by the Free Software Foundation.
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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 along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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#
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#%# family=auto
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#%# capabilities=autoconf
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module Munin
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class ThinPeakMemory
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def run
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instances = get_pids()
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instances.each do |instance|
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pid, port = instance.split("|")
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hwm = (pid_hwm(pid).to_i)/1024
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puts "thin_#{port}.value #{hwm}"
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end
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end
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# only get VmHWM count for each pid
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# (Virtual Memory High Water Mark)
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# Using Proc filesystem
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# ONLY LINUX! because relies on proc filesystem
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# TODO: make this work on OSX and Solaris,
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# so the whole unix gang is happy ;)
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def pid_hwm(pid)
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res = `grep "VmHWM" /proc/#{pid}/status`.split[1]
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if res.match("cannot access")
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return nil
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else
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return res
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end
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end
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# fetch all pids that match thin
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def get_pids
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pids = `pgrep -f 'thin' -l | awk -F " " '{ if (substr( $4, 10, 4)>=1) print $1"|"substr( $4, 10, 4)}' | sort -t'|' -nk 2`.split(/\r?\n/)
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end
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def autoconf
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get_pids().length > 0
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end
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end
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end
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mpm = Munin::ThinPeakMemory.new
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case ARGV[0]
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when "config"
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puts "graph_title Thin Peak Memory (High Water Mark)"
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puts "graph_vlabel HWM"
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puts "graph_category webserver"
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puts "graph_args -l 0"
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puts "graph_scale yes"
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puts "graph_info Tracks the peak memory of thin processes, aka High Water Mark."
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mpm.get_pids.each do |instance|
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pid, port = instance.split("|")
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puts "thin_#{port}.label thin_#{port}"
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puts "thin_#{port}.info Peak Memory"
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puts "thin_#{port}.type GAUGE"
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puts "thin_#{port}.min 0"
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end
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when "autoconf"
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if mpm.autoconf
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puts "yes"
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exit 0
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end
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puts "no"
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exit 0
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else
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mpm.run
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end
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