124 lines
3.3 KiB
Ruby
Executable File
124 lines
3.3 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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=begin
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Munin Plugin for PGA memory components monitoring
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Author: Wilfred Chau <openapp.developer@gmail.com>
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Date: 2011-05-13
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Version: 1.0
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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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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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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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Prerequistes:
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1) env.ORACLE_HOME set in munin-node
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2) rubygems
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3) oci8 - DBI gem for connecting to Oracle
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* instruction of installing oci8 is available here:
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http://ruby-oci8.rubyforge.org/en/InstallBinaryPackage.html
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Usage:
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1) copy this script to the munin install plugins directory (e.g. /usr/share/munin/plugins)
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2) chmod to allow executable to others
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3) create symbolic link in /etc/munin/plugins
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ln -s /usr/share/munin/plugins/oracle_<sid>_pga.rb /etc/munin/plugins/oracle_<sid>_pga.rb
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** replace <sid> with your oralce sid
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Parameters:
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autoconf
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config (required)
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Configurable variables:
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orauser : oracle user who has select privilege to query v$pgastat view
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orapass : password for the oracle user
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dbport : port used by the monitored instance (notice: numeric value)
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dbname : database to be monitored
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dbhost : host or ip address of db instance
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#%# family=auto
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#%# capabilities=autoconf
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=end
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require 'rubygems'
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require 'oci8'
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orauser = 'munin'
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orapass = 'munin'
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dbport = 1522
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dbname = 'orcl'
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dbhost = 'localhost'
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tnsname = "(DESCRIPTION =
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(ADDRESS = (PROTOCOL = TCP)(HOST = #{dbhost})(PORT = #{dbport}))
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(CONNECT_DATA = (SID = #{dbname})))"
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def runQuery(name, query)
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rows = $conn.exec(query)
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puts "#{name}.value #{rows.fetch}"
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rows.close
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end
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#
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# Queries
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#
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pga_target_query = "SELECT TO_CHAR(ROUND(decode(unit,'bytes',(value)/(1024*1024),value),2)) pga_target
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from V$PGASTAT where name = 'aggregate PGA target parameter'"
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pga_query = "SELECT TO_CHAR(ROUND(decode(unit,'bytes',(value)/(1024*1024),value),2)) pga
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from V$PGASTAT where name = 'total PGA inuse'"
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pga_components = { 'pga_target' => pga_target_query,
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'pga_in_use' => pga_query }
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#
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# autoconf
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#
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case ARGV[0]
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when 'autoconf'
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if tnsname.length > 1 && orauser.length > 1 && orapass.length > 1
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puts 'yes'
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else
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puts 'no'
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puts "Usage: #{__FILE__} autoconf|conf"
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end
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exit 0
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#
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# config definition
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#
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when 'config'
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puts 'graph_args --base 1024k -r --lower-limit 0'
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puts "graph_title Oracle PGA from #{dbname}"
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puts 'graph_category db'
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puts 'graph_info This graph shows the PGA memory usage (in MB)'
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puts 'graph_vlabel MB'
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puts 'graph_scale no'
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puts 'graph_period second'
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pga_components.keys.each do |p|
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puts "#{p}.label #{p}"
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puts "#{p}.info PGA: #{p}"
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puts "#{p}.type GAUGE"
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puts "#{p}.draw LINE1"
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end
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exit 0
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end
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$conn = OCI8.new(orauser, orapass, tnsname)
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pga_components.each do |pc, query|
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runQuery(pc, query)
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end
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$conn.logoff
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