zabbix是一个非常好的监控平台软件，通过编写被监控目标的脚步实现对目标的监控。

下面是Postgresql的一个监控脚步：（可以在此基础之上进行修改）

原文地址

http://www.zabbix.com/forum/showthread.php?t=8009

#! /bin/bash
#
# Name: zapost
#
# Checks Postgresql activity.
#
# Author: bashman
#
# Version: 1.0
#

zapostver="1.0"
rval=0
sql=""

case $1 in

#'summary')
# sql="select a.datname,pg_size_pretty(pg_database_size(a.datid)) as size,cast(blks_hit/(blks_read+blks_hit+0.000001)*100.0 as numeric(5,2)) as cache,cast(xact_commit/(xact_rollback+xact_commit+0.000001)*100.0 as numeric(5,2)) as success from pg_stat_database a order by a.datname"
# ;;

#'size')
#comprobar aqui los parametros
# shift
# sql="select pg_database_size('$1') as size"
# ;;

#'version')
# sql='select version()'
# ;;

'totalsize')
sql="select sum(pg_database_size(datid)) as total_size from pg_stat_database"
;;

'db_cache')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select cast(blks_hit/(blks_read+blks_hit+0.000001)*100.0 as numeric(5,2)) as cache from pg_stat_database where datname = '$1'"
fi
;;

'db_success')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select cast(xact_commit/(xact_rollback+xact_commit+0.000001)*100.0 as numeric(5,2)) as success from pg_stat_database where datname = '$1'"
fi
;;

'server_processes')
sql="select sum(numbackends) from pg_stat_database"
;;

'tx_commited')
sql="select sum(xact_commit) from pg_stat_database"
;;

'tx_rolledback')
sql="select sum(xact_rollback) from pg_stat_database"
;;

'db_size')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select pg_database_size('$1')" #as size"
fi
;;

'db_connections')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select numbackends from pg_stat_database where datname = '$1'"
fi
;;

'db_returned')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select tup_returned from pg_stat_database where datname = '$1'"
fi
;;

'db_fetched')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select tup_fetched from pg_stat_database where datname = '$1'"
fi
;;

'db_inserted')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select tup_inserted from pg_stat_database where datname = '$1'"
fi
;;

'db_updated')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select tup_updated from pg_stat_database where datname = '$1'"
fi
;;

'db_deleted')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select tup_deleted from pg_stat_database where datname = '$1'"
fi
;;

'db_commited')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select xact_commit from pg_stat_database where datname = '$1'"
fi
;;

'db_rolled')
# comprueba los parametros
if [ ! -z $2 ]; then
shift
sql="select xact_rollback from pg_stat_database where datname = '$1'"
fi
;;

'version')
sql="version"
;;

'zapostver')
echo "$zapostver"
exit $rval
;;

*)
echo "zapost version: $zapostver"
echo "usage:"
echo " $0 total size -- Check the total databases size."
echo " $0 db_cache <dbname> -- Check the database cache hit ratio (percentage)."
echo " $0 db_success <dbname> -- Check the database success rate (percentage)."
echo " $0 server_processes -- Check the total number of Server Processes that are active."
echo " $0 tx_commited -- Check the total number of commited transactions."
echo " $0 tx_rolledback -- Check the total number of rolled back transactions."
echo " $0 db_size <dbname> -- Check the size of a Database (in bytes)."
echo " $0 db_connections <dbname> -- Check the number of active connections for a specified database."
echo " $0 db_returned <dbname> -- Check the number of tuples returned for a specified database."
echo " $0 db_fetched <dbname> -- Check the number of tuples fetched for a specified database."
echo " $0 db_inserted <dbname> -- Check the number of tuples inserted for a specified database."
echo " $0 db_updated <dbname> -- Check the number of tuples updated for a specified database."
echo " $0 db_deleted <dbname> -- Check the number of tuples deleted for a specified database."
echo " $0 db_commited <dbname> -- Check the number of commited back transactions for a specified database."
echo " $0 db_rolled <dbname> -- Check the number of rolled back transactions for a specified database."
echo " $0 version -- The Postgresql version."
echo " $0 zapostver -- Version of this script."
exit $rval
;;
esac

if [ "$sql" != "" ]; then
if [ "$sql" == "version" ]; then
psql --version|head -n1
rval=$?
else
psql -t -c "$sql"
rval=$?
fi
fi

if [ "$rval" -ne 0 ]; then
echo "ZBX_NOTSUPPORTED"
fi

exit $rval

# # end zapost