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contrib-munin/plugins/thin/thins_peak_memory
2013-06-12 16:59:48 +02:00

103 lines
2.8 KiB
Ruby
Executable File

#!/usr/bin/env ruby
# thin_peak_memory -
# A munin plugin for Linux to monitor the maximum memory size
# that an each individual thin process has reached
#
# For Linux ONLY !
# DOES NOT WORK on OSX, Solaris or BSD.
# only linux, because this script relies on proc filesystem
#
# Author:
# Frederico de Souza Araujo - fred.the.master@gmail.com
# http://www.frederico-araujo.com
#
# Based on:
# thin_process_memory -
# A munin plugin to monitor memory size of
# each individual thin process
# by Ben VandenBos and Avvo, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#
#%# family=auto
#%# capabilities=autoconf
module Munin
class ThinPeakMemory
def run
instances = get_pids()
instances.each do |instance|
pid, port = instance.split("|")
hwm = (pid_hwm(pid).to_i)/1024
puts "thin_#{port}.value #{hwm}"
end
end
# only get VmHWM count for each pid
# (Virtual Memory High Water Mark)
# Using Proc filesystem
# ONLY LINUX! because relies on proc filesystem
# TODO: make this work on OSX and Solaris,
# so the whole unix gang is happy ;)
def pid_hwm(pid)
res = `grep "VmHWM" /proc/#{pid}/status`.split[1]
if res.match("cannot access")
return nil
else
return res
end
end
# fetch all pids that match thin
def get_pids
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/)
end
def autoconf
get_pids().length > 0
end
end
end
mpm = Munin::ThinPeakMemory.new
case ARGV[0]
when "config"
puts "graph_title Thin Peak Memory (High Water Mark)"
puts "graph_vlabel HWM"
puts "graph_category Thin"
puts "graph_args -l 0"
puts "graph_scale yes"
puts "graph_info Tracks the peak memory of thin processes, aka High Water Mark."
mpm.get_pids.each do |instance|
pid, port = instance.split("|")
puts "thin_#{port}.label thin_#{port}"
puts "thin_#{port}.info Peak Memory"
puts "thin_#{port}.type GAUGE"
puts "thin_#{port}.min 0"
end
when "autoconf"
if mpm.autoconf
puts "yes"
exit 0
end
puts "no"
exit 1
else
mpm.run
end