How can i make zabbix server to consume as little RAM as possible

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http://serverfault.com – I am using Zabbix on my Amazon Ec2 small instance but it is consuming very large RAM about 700MB.I think by default the zabbix is monitoring so many things . however i only want to monitor very few things like CPU usage RAM usage Httpd service MySQL service If i remove all the other services,. will it consume less RAM (HowTos)