In the next box, we have a previously made announcement, which is a very important one—the introduction of active checks. Nowadays, people don't recognize the importance of this feature.
Tip
2005/05/08: Zabbix 1.1alpha8 released
The release introduces active checks, that is, checks initiated by the Zabbix agent. Using active checks will greatly decrease hardware requirements for the Zabbix server.
I've been holding training sessions since 2009 (I've been an official Zabbix trainer since 2012). In all of those training sessions, when I was talking about the power behind active items, there were some guys getting surprised in almost every session. It happens that the default templates released by Zabbix SIA are created to be easy to try with Zabbix. We shouldn't use these templates in a production environment. We should create our own templates based on them.
The default templates released with Zabbix sources don't use active items. Why? It's too simple and obvious...