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Mini Shell
Mini Shell
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const v8 = require("v8");
const debug_1 = require("debug");
const serviceManager_1 = require("../serviceManager");
class V8MetricsConfig {
}
exports.V8MetricsConfig = V8MetricsConfig;
const defaultOptions = {
new_space: false,
old_space: false,
map_space: false,
code_space: false,
large_object_space: false,
heap_total_size: true,
heap_used_size: true,
heap_used_percent: true
};
class V8Metric {
constructor() {
this.TIME_INTERVAL = 800;
this.logger = debug_1.default('axm:features:metrics:v8');
this.metricStore = new Map();
this.unitKB = 'MiB';
this.metricsDefinitions = {
total_heap_size: {
name: 'Heap Size',
id: 'internal/v8/heap/total',
unit: this.unitKB,
historic: true
},
heap_used_percent: {
name: 'Heap Usage',
id: 'internal/v8/heap/usage',
unit: '%',
historic: true
},
used_heap_size: {
name: 'Used Heap Size',
id: 'internal/v8/heap/used',
unit: this.unitKB,
historic: true
}
};
}
init(config) {
if (config === false)
return;
if (config === undefined) {
config = defaultOptions;
}
if (config === true) {
config = defaultOptions;
}
this.metricService = serviceManager_1.ServiceManager.get('metrics');
if (this.metricService === undefined)
return this.logger('Failed to load metric service');
this.logger('init');
if (!v8.hasOwnProperty('getHeapStatistics')) {
return this.logger(`V8.getHeapStatistics is not available, aborting`);
}
for (let metricName in this.metricsDefinitions) {
if (config[metricName] === false)
continue;
const isEnabled = config[metricName];
if (isEnabled === false)
continue;
let metric = this.metricsDefinitions[metricName];
this.metricStore.set(metricName, this.metricService.metric(metric));
}
this.timer = setInterval(() => {
const stats = v8.getHeapStatistics();
for (let metricName in this.metricsDefinitions) {
if (typeof stats[metricName] !== 'number')
continue;
const gauge = this.metricStore.get(metricName);
if (gauge === undefined)
continue;
gauge.set(this.formatMiBytes(stats[metricName]));
}
const usage = (stats.used_heap_size / stats.total_heap_size * 100).toFixed(2);
const usageMetric = this.metricStore.get('heap_used_percent');
if (usageMetric !== undefined) {
usageMetric.set(parseFloat(usage));
}
}, this.TIME_INTERVAL);
this.timer.unref();
}
destroy() {
if (this.timer !== undefined) {
clearInterval(this.timer);
}
this.logger('destroy');
}
formatMiBytes(val) {
return (val / 1024 / 1024).toFixed(2);
}
}
exports.default = V8Metric;
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Zerion Mini Shell 1.0