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I've long used Munin for basic resource monitoring on a huge variety of servers. It's simple, reliable, easy to configure, and besides the fact that it uses Perl for plugins, there's not much against it! Last week, I got a notice from my 'low end box' VPS provider that my Munin server—which is aggregating data from about 50 other servers—had high IOPS and would be shut down if I didn't get it back into an allowed threshold. Most low end VPSes run things like static HTML websites, so disk IO is v...