Nagios Support Forum

Hi,

I have a nagiosXI server currently, I'm monitoring 1000 hosts including approx. 12000 services on my server. But the problem is the response of my NagiosXI server is now very slow. what can I do to troubleshoot this problem? Pls, provide a possible solution.

The customer wants HA clustering for current 1000 hosts NagiosXI server in active-passive phase. is it possible to do?

Also, additional 1200 devices including same approx.12000 services need to add in NagiosXI server. is it possible to add 1200 devices in existing 1000 hosts server or I need to create new NagiosXi server for 1200 devices?

Hello, @vinish098.

I have a nagiosXI server currently, I'm monitoring 1000 hosts including approx. 12000 services on my server. But the problem is the response of my NagiosXI server is now very slow. what can I do to troubleshoot this problem? Pls, provide a possible solution.

This really depends on your XI server hardware configuration as well as the type of checks you are running. Some checks do not consume a lot of resources while others significantly impact the system load.
Increasing ram and adding CPU cores with high frequency would be the step number one. Slow hard drives significantly reduce XI performance and increase the IO wait. So on a very large system we recommend using SSD hard drives to speed up the performance.

Here're are some first steps you can take.
Increase the settings in the /etc/php.ini:
https://support.nagios.com/kb/article/n ... le-611.html
(double all values suggested in this article)
Implement a ram disk(we have an automated script that takes care of the installation for you):
https://assets.nagios.com/downloads/nag ... giosXI.pdf

The customer wants HA clustering for current 1000 hosts NagiosXI server in active-passive phase. is it possible to do?

Here's an article explaining some high availability options for XI.
https://assets.nagios.com/downloads/nag ... ios-XI.pdf

This article explains how to set up passive checks forwarding from one XI server to another using NRDP:
https://assets.nagios.com/downloads/nag ... h-NRDP.pdf

Also, additional 1200 devices including same approx.12000 services need to add in NagiosXI server. is it possible to add 1200 devices in existing 1000 hosts server or I need to create new NagiosXi server for 1200 devices?

It is possible but you'd need to implement enhancements I mentioned above. Technically, the "recommended" amount of hosts and services is 20k. But we do have customers who are running over 100k hosts and service checks with proper adjustments.

After 20k checks I suggest implementing mod gearman workers:
https://assets.nagios.com/downloads/nag ... ios_XI.pdf