process usage lookup with nodejs
- Simple interface to lookup cpu and memory usage of any accessible process on the system.
- Works on OSX, Linux, SmartOS and Solaris
- Tested on Heroku, Nodejitsu and Modulus
var usage = ;var pid = processpid // you can use any valid PID insteadusage;
memory: 100065280 // in no of bytesmemoryInfo:rss: 15966208 // resident size memory in bytesvsize: 3127906304 // virtual memory size in bytescpu: 106 // in percentage
Average CPU usage vs Current CPU usage
This is only applicable for Linux
By default CPU Percentage provided is an average from the starting time of the process. It does not correctly reflect the current CPU usage. (this is also a problem with linux
But If you call
usage.lookup() continuously for a given pid, you can turn on keepHistory flag and you'll get the CPU usage since last time you track the usage. This reflects the current CPU usage.
see following example to enable keepHistory flag
var pid = processpid;var options = keepHistory: trueusage;
you can clear history cache too
usage; //clear history for the given pidusage; //clean history for all pids