Someone knows about a tool that test the cpu usage, memory, IO Read/Write with MapProxy or a WMS, WMTS, TMS Server?
Like a 'Web Stress tool' that test Server with concurrent clients request and navigation through the site.
I also can recommend JMeter, as iant already mentioned. Its very flexible and after a while simple to use.
If you look for something more "eye candy" like you can also try loadUI (http://www.loadui.org/) which is a little bit more intuitive. Its not as flexible as Jmeter, but in my opinion its a more lightweight load testing tool which you can also use for monitoring purposes.