100 lines
6.9 KiB
JavaScript
100 lines
6.9 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const v8 = require("v8");
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const debug_1 = require("debug");
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const serviceManager_1 = require("../serviceManager");
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class V8MetricsConfig {
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}
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exports.V8MetricsConfig = V8MetricsConfig;
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const defaultOptions = {
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new_space: false,
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old_space: false,
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map_space: false,
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code_space: false,
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large_object_space: false,
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heap_total_size: true,
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heap_used_size: true,
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heap_used_percent: true
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};
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class V8Metric {
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constructor() {
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this.TIME_INTERVAL = 800;
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this.logger = debug_1.default('axm:features:metrics:v8');
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this.metricStore = new Map();
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this.unitKB = 'MiB';
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this.metricsDefinitions = {
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total_heap_size: {
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name: 'Heap Size',
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id: 'internal/v8/heap/total',
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unit: this.unitKB,
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historic: true
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},
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heap_used_percent: {
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name: 'Heap Usage',
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id: 'internal/v8/heap/usage',
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unit: '%',
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historic: true
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},
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used_heap_size: {
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name: 'Used Heap Size',
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id: 'internal/v8/heap/used',
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unit: this.unitKB,
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historic: true
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}
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};
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}
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init(config) {
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if (config === false)
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return;
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if (config === undefined) {
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config = defaultOptions;
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}
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if (config === true) {
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config = defaultOptions;
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}
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this.metricService = serviceManager_1.ServiceManager.get('metrics');
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if (this.metricService === undefined)
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return this.logger('Failed to load metric service');
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this.logger('init');
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if (!v8.hasOwnProperty('getHeapStatistics')) {
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return this.logger(`V8.getHeapStatistics is not available, aborting`);
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}
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for (let metricName in this.metricsDefinitions) {
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if (config[metricName] === false)
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continue;
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const isEnabled = config[metricName];
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if (isEnabled === false)
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continue;
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let metric = this.metricsDefinitions[metricName];
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this.metricStore.set(metricName, this.metricService.metric(metric));
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}
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this.timer = setInterval(() => {
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const stats = v8.getHeapStatistics();
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for (let metricName in this.metricsDefinitions) {
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if (typeof stats[metricName] !== 'number')
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continue;
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const gauge = this.metricStore.get(metricName);
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if (gauge === undefined)
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continue;
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gauge.set(this.formatMiBytes(stats[metricName]));
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}
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const usage = (stats.used_heap_size / stats.total_heap_size * 100).toFixed(2);
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const usageMetric = this.metricStore.get('heap_used_percent');
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if (usageMetric !== undefined) {
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usageMetric.set(parseFloat(usage));
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}
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}, this.TIME_INTERVAL);
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this.timer.unref();
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}
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destroy() {
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if (this.timer !== undefined) {
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clearInterval(this.timer);
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}
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this.logger('destroy');
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}
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formatMiBytes(val) {
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return (val / 1024 / 1024).toFixed(2);
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}
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}
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exports.default = V8Metric;
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