Is there a performance monitoring tool that works out of the box? (Debian)
I need a performance monitoring tool that would allow me to monitor:
server load, cpu & memory usage, netwirk i/o traffic,
and if possible:
nº of processes, nº of HTTP processes, nº of TCP connections, and disk I/O usage.
I am used to mrtg on servers that I don't manage where it came already installed, and I'm looking for something similar.
Unfortunately (and surprisingly) mrtg seems to be astonishingly convoluted to configure so that it would monitor all of the above (despite being widely used to do so), and it doesn't even work out-of-the-box (apt-get install mrtg) for monitoring what it is supposed to monitor by default let alone set it up for monitoring more stuff.
I've also tried cacti (apt-get install cacti, then followed installation instructions in the docs) and it just doesn't work (poller doesn't generate images, graphs show up as broken images). I'm tired of reading its FAQs where no hint is given to even debug what's wrong.
Is there any general performance monitoring tool that just works out of the box, without having to figure out all sorts of tweaks and fix wrong default configurations to get it to work?
Something with simple and unanbiguous installation instructions that actually work?