#!/bin/bash
#
# Plugin to monitor PostgreSQL Commits and Rollbacks in Transactions
#
# Author:
#    Guilherme Augusto da Rocha Silva <gars.dba@gmail.com>
#
# Created:
#    9th of november 2007
#
# Usage:
#    Place in /etc/munin/plugins/ (or link it there using ln -s)
#
# Parameters:
#    config   (required)
#
# General info:
#    Require permission for database access and read (no writes are processed).
#    Recommended user is PostgreSQL database owner (default: postgres).
#
# Log info:
#

dbserver='localhost'
dbuser='postgres'

if [ "$1" = "config" ]; then
   echo 'graph_args --base 1000 --lower-limit 0'
   echo 'graph_category db'
   echo 'graph_info Shows summarized commits and rollbacks in transactions on the PostgreSQL Server.'
   echo 'graph_title PostgreSQL Transactions'
   echo 'graph_vlabel Number of Commits and Rollbacks'

   echo 'commits.label commits'
   echo 'commits.min 0'
   echo 'commits.info Number of transaction commits.'

   echo 'rollbacks.label rollbacks'
   echo 'rollbacks.min 0'
   echo 'rollbacks.info Number of transaction rollbacks.'
   exit 0
fi
psql -h ${dbserver} -U ${dbuser} -tc "SELECT '\ncommits.value '||SUM(xact_commit)::TEXT || '\nrollbacks.value '||SUM(xact_rollback)::TEXT FROM pg_stat_database;"