Zabbix's internal keys have existed since version 1.6, but only in the newer versions have they gotten a wider range. Interestingly, however, Zabbix's internal keys can be termed as the "monitors that monitor other monitors". In practice, we need to measure Zabbix's behavior so that we can take decisions about what changes to make. But just knowing the internal keys of Zabbix is not enough. We need to know what each one of them means and what the effects of a change in any of the parameters related to the keys can be.

Zabbix's internal metrics are an important part of the decisions on performance tuning of an environment. This metrics can't be evaluated alone; we need to understand that they could be affected by other factors, such as the Zabbix database's settings.

The important thing here is to understand that there are no "magic settings" or "silver bullets" that can ensure best performance in any environment. Monitoring and evaluation of specific...