cpu-memory-monitor

CPU & Memory Monitor, auto dump.

Install

$ npm i cpu-memory-monitor --save

Usage

require('cpu-memory-monitor')(options)

example:

require('cpu-memory-monitor')({
  cpu: {
    interval: 1000,
    duration: 30000,
    threshold: 60,
    profileDir: '/tmp',
    counter: 3,
    limiter: [5, 'hour']
  },
  memory: {
    interval: 5000,
    threshold: '500mb',
    ...
  }
})

will generate:

cpu-${process.pid}-${Date.now()}.cpuprofile
memory-${process.pid}-${Date.now()}.heapsnapshot
leak-memory-${process.pid}-${Date.now()}.heapsnapshot

require('cpu-memory-monitor')({
  cpu: {
    interval: 1000,
    duration: 30000,
    threshold: 60,
    profileDir: '/tmp',
    counter: 3,
    limiter: [5, 'hour']
  }
})

means: every 1000ms check CPU usage, when CPU(%) > 60% for 3 times, then dump 30000ms CPU usage(.cpuprofile) to /tmp, dump could be triggered at most 5 times an hour.

you can also use:

$ kill -USR2 PID

see heapdump.

Options

• cpu{Object}
  • interval{Number}: interval(ms) for check CPU usage, default: 1000
  • duration{Number}: duration(ms) for profiling CPU, default: 30000
  • threshold{Number}: process max CPU(%) usage, default: 90
  • profileDir{String}: directory for save cpuprofile, default: process.cwd()
  • counter{Number}: the number of CPU > threshold, then dump, default: 1
  • limiter{Array}: options pass to limiter, default: [3, 'hour']
• memory{Object}
  • interval{Number}: interval(ms) for check Memory usage, default: 1000
  • threshold{String}: process max Memory usage, default: 1.2gb, see bytes
  • profileDir{String}: directory for save heapsnapshot, default: process.cwd()
  • counter{Number}: the number of Memory > threshold, then dump, default: 1
  • limiter{Array}: options pass to limiter, default: [3, 'hour']

NB: If omit cpu/memory option, cpu-momery-monitor will not monitor it.

License

MIT