Nginx Munin plugin shows no data

The nginx plugins rely on the following URL to get the status info: http://127.0.0.1/nginx_status Usually, nginx does not have this URL configured to show status data. From the documentation of the plugins, I see that nginx needs to be configured to show status data in a spesific URL. You need to enable nginx status by … Read more

Interpreting munin graph and committed memory

Committed memory is, essentially, all the memory which has been allocated by applications, whether it’s used or not. In contrast, the “apps” is memory that is allocated AND used. See e.g. https://elixir.bootlin.com/linux/latest/source/Documentation/filesystems/proc.rst#L932 FWIW, you’re using 85 MB swap, which seems perfectly Ok; most likely the system is just swapping out unused stuff so that it … Read more

Munin vs Nagios

Munin and Nagios are really different tools. From the official Munin website: Munin is a networked resource monitoring tool that can help analyze resource trends and “what just happened to kill our performance?” problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work. … Read more