Gauge

See Gauge for the concept.

Call set() with a value:

import {Registry} from "nflx-spectator";

const registry = new Registry();
void registry.gauge("server.queueSize").set(10);

const queue_size = registry.new_id("server.queueSize");
void registry.gauge_with_id(queue_size).set(10);

Gauges will report the last set value for 15 minutes. This done so that updates to the values do not need to be collected on a tight 1-minute schedule to ensure that Atlas shows unbroken lines in graphs. A custom TTL may be configured for gauges. SpectatorD enforces a minimum TTL of 5 seconds.

import {Registry} from "nflx-spectator";

const registry = new Registry();
void registry.gauge("server.queueSize", ttl_seconds=120).set(10);

const queue_size = registry.new_id("server.queueSize");
void registry.gauge_with_id(queue_size, ttl_seconds=120).set(10);