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contrib-munin/plugins/mssql/microsoft-sql-buffer-cache-hit-ratio
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106 lines
3.1 KiB
Ruby
Executable File

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