Inspect Memory Usage in Node.js

get.memory.ts

import Joi from '@hapi/joi'
import { Request, Response, NextFunction } from 'express'

export const schema = Joi.object().keys({
	body: Joi.object(),
	query: Joi.object(),
	params: Joi.object()
})

const formatMemmoryUsage = (data: any) => `${Math.round(data / 1024 / 1024 * 100) / 100} MB`

export const workflow = async (req: Request, res: Response, next: NextFunction) => {
	try {
		const memoryData = process.memoryUsage()

		const result = {
			name: process.env.npm_package_name,
			version: process.env.npm_package_version,
			env: process.env.NODE_ENV,
			host: process.env.HOST,
			memmoryUsage: {
				rss: `${formatMemmoryUsage(memoryData.rss)} -> Resident Set Size - total memory allocated for the process execution`,
				heapTotal: `${formatMemmoryUsage(memoryData.heapTotal)} -> total size of the allocated heap`,
				heapUsed: `${formatMemmoryUsage(memoryData.heapUsed)} -> actual memory used during the execution`,
				external: `${formatMemmoryUsage(memoryData.external)} -> V8 external memory`,
			}
		}
		return res.json(result)
	} catch (err) {
		return next(err)
	}
}