http://netdata.firehol.org/

http://netdata.firehol.org/

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netdata is the fastest way to visualize metrics. It is a resource efficient, highly optimized system for collecting and visualizing any type of realtime timeseries data, from CPU usage, disk activity, SQL queries, API calls, web site visitors, etc.

netdata tries to visualize the truth of now, in its greatest detail, so that you can get insights of what is happening now and what just happened, on your systems and applications.

To make a chart in netdata, you just need a number. Just a number you can read somehow. netdata will turn this number to a real time, interactive, web chart. For collecting these numbers, it supports external plugins, even shell or node.js plugins. Any computer program, in any language, that can print a few lines of text on its standard output, can be a netdata data collector.

netdata can embed charts everywhere, like this one 

 (my CPU system usage which is 4%), or this one 

 (my IPv4 received TCP packets, which are 275/second).

You can have netdata charts on your site too. Just give it a div and a real time chart, zoomable and draggable will appear (try it even on these tiny ones - drag them to pan horizontally, shift + drag to zoom in, on chrome shift + mouse wheel to zoom in/out, double click on them to reset them - don't be afraid of netdata performance - a raspberry pi 2 can sustain 300 charts updates per second!).

For more information please refer to the netdata wiki.