57 lines
1.5 KiB
JavaScript
Executable File
57 lines
1.5 KiB
JavaScript
Executable File
'use strict';
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const Gauge = require('../gauge');
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const safeMemoryUsage = require('./helpers/safeMemoryUsage');
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const NODEJS_HEAP_SIZE_TOTAL = 'nodejs_heap_size_total_bytes';
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const NODEJS_HEAP_SIZE_USED = 'nodejs_heap_size_used_bytes';
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const NODEJS_EXTERNAL_MEMORY = 'nodejs_external_memory_bytes';
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module.exports = (registry, config = {}) => {
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if (typeof process.memoryUsage !== 'function') {
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return;
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}
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const labels = config.labels ? config.labels : {};
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const labelNames = Object.keys(labels);
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const registers = registry ? [registry] : undefined;
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const namePrefix = config.prefix ? config.prefix : '';
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const collect = () => {
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const memUsage = safeMemoryUsage();
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if (memUsage) {
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heapSizeTotal.set(labels, memUsage.heapTotal);
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heapSizeUsed.set(labels, memUsage.heapUsed);
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if (memUsage.external !== undefined) {
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externalMemUsed.set(labels, memUsage.external);
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}
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}
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};
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const heapSizeTotal = new Gauge({
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name: namePrefix + NODEJS_HEAP_SIZE_TOTAL,
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help: 'Process heap size from Node.js in bytes.',
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registers,
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labelNames,
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// Use this one metric's `collect` to set all metrics' values.
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collect,
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});
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const heapSizeUsed = new Gauge({
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name: namePrefix + NODEJS_HEAP_SIZE_USED,
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help: 'Process heap size used from Node.js in bytes.',
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registers,
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labelNames,
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});
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const externalMemUsed = new Gauge({
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name: namePrefix + NODEJS_EXTERNAL_MEMORY,
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help: 'Node.js external memory size in bytes.',
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registers,
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labelNames,
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});
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};
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module.exports.metricNames = [
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NODEJS_HEAP_SIZE_TOTAL,
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NODEJS_HEAP_SIZE_USED,
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NODEJS_EXTERNAL_MEMORY,
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];
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