denoruntimemetrics.mdx

title	DenoRuntimeMetrics
description	Collect Deno runtime health metrics such as memory usage and process uptime.
supported	javascript.deno

This integration only works in the Deno runtime.

Import name: Sentry.denoRuntimeMetricsIntegration

The denoRuntimeMetricsIntegration periodically collects Deno runtime health metrics and sends them to Sentry. Metrics include memory usage and process uptime.

import * as Sentry from "@sentry/deno";

Sentry.init({
  dsn: "___PUBLIC_DSN___",
  integrations: [Sentry.denoRuntimeMetricsIntegration()],
});

Default Metrics

The following metrics are emitted every 30 seconds by default:

Metric	Type	Unit	Description
deno.runtime.mem.rss	gauge	byte	Resident Set Size — actual process memory footprint
deno.runtime.mem.heap_used	gauge	byte	V8 heap currently in use
deno.runtime.mem.heap_total	gauge	byte	Total V8 heap allocated
deno.runtime.process.uptime	counter	second	Cumulative process uptime

Unlike the Node.js equivalent, CPU and event loop metrics are not available because Deno does not expose process.cpuUsage(), performance.eventLoopUtilization(), or monitorEventLoopDelay.

Options

collect

Type: object

Configure which metrics to collect. You can enable opt-in metrics or disable default ones.

Opt-in metrics (off by default):

Sentry.denoRuntimeMetricsIntegration({
  collect: {
    memExternal: true, // deno.runtime.mem.external
  },
});

Disabling default metrics:

Sentry.denoRuntimeMetricsIntegration({
  collect: {
    uptime: false,
  },
});

collectionIntervalMs

Type: number

The interval in milliseconds between metric collections. Defaults to 30000 (30 seconds).

Sentry.denoRuntimeMetricsIntegration({
  collectionIntervalMs: 60_000,
});