106 lines
3.1 KiB
Plaintext
106 lines
3.1 KiB
Plaintext
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#! /usr/bin/ruby
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#
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# Munin Plugin for MSSQL - Buffer cache hit ratio monitoring
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#
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# Author: Wilfred Chau <openapp.developer@gmail.com>
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# Date: 2011-05-19
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# Version: 1.0
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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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# Prerequistes:
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# 1) /etc/odbc.ini and /etc/freetds.conf
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# 2) rubygems
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# 3) ruby-dbi
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#
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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/mssql_buffercachehitratio.rb /etc/munin/plugins/mssql_buffercachehitratio.rb
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#
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# Parameters:
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# autoconf
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# config (required)
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#
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# Config variables:
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# sqluser : mssql user who has view server state priviledge
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# sqlpass : password for the mssql user
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# dsn : datasource name as defined in /etc/odbc.ini
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#
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#%# family=auto
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#%# capabilities=autoconf
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require 'rubygems'
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require 'dbi'
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sqluser = 'rubyuser'
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sqlpass = 'rubyuser'
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dsn = 'TESTSQL'
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#
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# Queries
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#
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#
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dbh = DBI.connect("DBI:ODBC:#{dsn}",sqluser,sqlpass)
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buffercachehitratio_query = "select (a.cntr_value * 1.0 / b.cntr_value) * 100.0
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from sys.dm_os_performance_counters a
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join (select cntr_value, object_name
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from sys.dm_os_performance_counters
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where counter_name = 'Buffer cache hit ratio base'
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and object_name = 'SQLServer:Buffer Manager') b
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on a.object_name = b.object_name
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where a.counter_name = 'Buffer cache hit ratio'
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and a.object_name = 'SQLServer:Buffer Manager'"
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#
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# autoconf
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#
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if ARGV[0] == "autoconf"
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if all_instance_names.length > 1 && sqluser.length > 1 && sqlpass.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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elsif ARGV[0] == "config"
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puts "graph_args --base 1000 -r --lower-limit 0"
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puts "graph_title MSSQL Buffer Cache Hit Ratio "
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puts "graph_category MSSQL"
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puts "graph_info This graph shows Buffer Cache Hit Ratio"
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puts "graph_vlabel %"
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puts "graph_scale no"
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puts "graph_period second"
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puts "bc_hitratio.label BufferCacheHitRatio"
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puts "bc_hitratio.info BufferCacheHitRatio"
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puts "bc_hitratio.type GAUGE"
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puts "bc_hitratio.draw LINE1"
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exit 0
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end
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sth = dbh.execute(buffercachehitratio_query)
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sth.fetch do |row|
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puts "bc_hitratio.value #{row[0].strip.to_s}"
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end
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sth.finish
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dbh.disconnect
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