Nagios XI - System Requirements

Nagis XI System Requirements

Overview

Make sure the server you install Nagios XI on meets the requirements below.

Supported Distributions:

Nagios XI is currently supported with the following Linux distributions for both 32 and 64 bit installations:

• CentOS 6/7
• RHEL 6/7

Minimum system specs:

• 1 GHz Processor
• 1 GB RAM
• 8 GB HD

Recommended system specs:

• 2+ GHz Processor
• 2 GB RAM
• 40 GB HD
• RAID 5 Drive Configuration

Nagios XI - Hardware Requirements

Overview

This document is intended to provide general guidelines on the hardware requirements needed to run Nagios XI. As each IT infrastructure differs, the hardware requirements for monitoring can vary. For example, the guidelines below assume that you are running active checks. If you are utilizing a large number of passive checks, the requirements are less than the guidelines below. 

Requirements

The table below provides hardware recommendations based on a node (host) to service ratio of 1:5.

Monitored Nodes / Hosts	Monitored Services	Hard Drive Space	CPU Cores	RAM
50	250	40 GB	1 - 2	1 - 4 GB
100	500	80 GB	2 - 4	4 - 8 GB
> 500	> 2500	120 GB	> 4	> 8 GB

Performance Enhancements

There are a number of modifications that you can make to Nagios XI in order to increase performance, and therefore increase the number of nodes and services you can monitor with less hardware. These include:

• Offloading the MySQL database to a remote server
• Using a ramdisk
• Enabling rrdcache

Source: https://support.nagios.com/kb/article.php?id=12

However, the amount of required disk memory obviously depends on the number of hosts and parameters that are being monitored. If you're planning to keep a long history of monitored parameters, you should be thinking of at least a couple of gigabytes to have enough space to store the history in the database.