prom-client - npm Package Versions

types: converted all the generic Metric types to be optional

The done() functions returned by gauge.startTimer() and summary.startTimer() now return the timed duration. Histograms already had this behavior.

types: fixed type for registry.getMetricsAsArray()

Improve performance of gague.inc() and gauge.dec() by calling hashObject() once.

The processResources metric was added, which keeps a track of all sorts of active resources. It consists of the following gauges:

• nodejs_active_resources - Number of active resources that are currently keeping the event loop alive, grouped by async resource type.
• nodejs_active_resources_total - Total number of active resources. It is supposed to provide the combined result of the processHandles and processRequests metrics along with information about any other types of async resources that these metrics do not keep a track of (like timers).

Support gzipped pushgateway requests

changed: linearBuckets does not propagate rounding errors anymore.

Fewer bucket bounds will be affected by rounding errors. Histogram bucket labels may change. 6f1f3b2

changed: The push gateway methods pushAdd(), push() and delete() now return Promises instead of accepting a callback:

// Old:
gateway.pushAdd({ jobName: 'test' }, (err, resp, body) => {});
// New:
gateway
  .pushAdd({ jobName: 'test' })
  .then(({ resp, body }) => {})
  .catch(err => {});
// or
const { resp, body } = await gateway.pushAdd({ jobName: 'test' });

f177b1f

changed: The default nodejs_eventloop_lag_* metrics are now reset every time they are observed. This prevents these metrics from "stabilizing" over a long period of time and becoming insensitive to small changes. For more info, see #370. 0f444cd