NodeJS Process Stats

NodeJS library for collecting processor and memory stats for monitoring.

Usage

const stats = require("@twpol/process-stats");

let previousData = stats.get();

setInterval(function () {
  const data = stats.get(previousData);

  // Use the data as needed (see docs below)

  previousData = data;
}, 60000);

Collected data

Data is organised for capturing into health metrics, so under each type there are cpu and memory stats, all expressed as fractions of the total value.

Types always have cpu.total and memory.total. Those which measure usage also always have cpu.busy and memory.used.

• os (operating system)
  • uptime (seconds)
  • load (three element array of floats)
  • cpu
    • user (fraction of usable processor time spent in user mode code)
    • nice (fraction of usable processor time spent in nice user mode code)
    • sys (fraction of usable processor time spent in kernel mode code)
    • irq (fraction of usable processor time spent in interrupt request handling code)
    • busy (fraction of usable processor time spent running code - sum of values above)
    • idle (fraction of usable processor time spent idle - opposite of busy)
    • total (usable processor time in logical cores)
  • memory
    • used (fraction of usable memory being used)
    • free (fraction of usable memory not being used - opposite of used)
    • total (usable memory in bytes)
• awsTask (current AWS EC2/Fargate task)
  • metadata (complete AWS EC2/Fargate V4 task metadata)
  • cpu
    • total (usable processor time in logical cores)
  • memory
    • total (usable memory in bytes)
• awsContainer (current AWS EC2/Fargate container)
  • metadata (complete AWS EC2/Fargate V4 container metadata)
  • cpu
    • total (usable processor time in logical cores)
  • memory
    • total (usable memory in bytes)
• container (current cgroup-based container)
  • cpu
    • busy (fraction of usable processor time spent running code - sum of values above)
    • idle (fraction of usable processor time spent idle - opposite of busy)
    • total (usable processor time in logical cores)
  • memory
    • used (fraction of usable memory being used)
    • free (fraction of usable memory not being used - opposite of used)
    • total (usable memory in bytes)
• process (current process)
  • cpu
    • user (fraction of usable processor time spent in user mode code)
    • system (fraction of usable processor time spent in kernel mode code)
    • busy (fraction of usable processor time spent running code - sum of values above)
    • total (usable processor time in logical cores)
  • memory
    • external (fraction of usable memory used by JavaScript runtime)
    • heapTotal (fraction of usable memory used by JavaScript runtime)
    • heapUsed (fraction of usable memory used by JavaScript runtime)
    • rss (fraction of usable memory being used)
    • used (fraction of usable memory being used - same as rss)
    • total (usable memory in bytes)