Nagios Support Forum

My question is how to optimize Nagios HTTP checks?

My Nagios instance is monitoring HTTP and displays the following error, yet the web server is operational.

HTTP CRITICAL: HTTP/1.1 500 Internal Server Error - 5640 bytes in 0.003 second response time

How to resolve? Thanks in advance.

I would probably check the logs on the web server and try to work out why it is returning error 500, you can also run check_http (found in /usr/local/nagios/libexec) from the command line to help debug the problem and see all the options available for the check.