What are Application Metrics? ie Perfcounter, Performance Metrics, Operational data, Monitoring, telemetry

Registry

They are generally locally grouped in a registry in order to batch the data collection.

Dimensionality

Time serie data may be classified via:

• dimension - the event is enriched with tag key/value pairs. (AppOptics, Atlas, Azure Monitor, Cloudwatch, Datadog, Datadog StatsD, Dynatrace, Elastic, Humio, Influx, KairosDB, New Relic, Prometheus, SignalFx, Sysdig StatsD, Telegraf StatsD, Wavefront)
• hierarchy - the name is a flat hierarchical metric name (Graphite, Ganglia, JMX, Etsy StatsD)
• or both

Hierarchy Example :

• Atlas (CamelCase)- httpServerRequests
• Graphite (Point separator)- http.server.requests
• InfluxDB and Prometheus separated by _ - http_server_requests

Aggregation Processing

The aggregation of a set of samples over a prescribed time interval (Rate aggregation) may be performed:

• Client Side (AppOptics, Atlas, Azure Monitor, Datadog, Elastic, Graphite, Ganglia, Humio, Influx, JMX, Kairos, New Relic, all StatsD flavors, SignalFx)
• or Server-side (Prometheus, Wavefront)

Example: conversion of discrete samples (such as counts) to a rate.

Not all measurements are reported or best viewed as a rate. For example, gauge values are not rates.

Metrics Collection

The collection of metrics may be done:

• client side via client pushes (AppOptics, Atlas, Azure Monitor, Datadog, Elastic, Graphite, Ganglia, Humio, Influx, JMX, Kairos, New Relic, SignalFx, Wavefront)
• server side via server polls (Prometheus, all StatsD flavors)

Sensor

• temperature,
• speed,
• voltage,
• number of printouts
• …

Service Metrics

See SLI: Service Level Indicators:

• Resource metrics (CPU, Memory,…)
• and process metrics

Event

Some monitoring systems can also capture events:

• Changes: Internal code releases, builds, and build failures
• Alerts: Internally generated alerts or third-party notifications
• Scaling events: Adding or subtracting hosts

Scale and Persistence

• last 2 hours at 1 minute resolution,
• last 24 hours at 10 minute resolution,
• last 3 days with 1 hour resolution,
• last 7 days at 2 hours resolution

X-scale (Minor/Major Tick)