Monitoring is dead

@sebamontini MEDALLIA Monitoring is Dead And why you’re (probably) doing
it wrong

@sebamontini MEDALLIA

@sebamontini MEDALLIA Why?

@sebamontini MEDALLIA The big 5

@sebamontini MEDALLIA The big 5 ✓ CPU → uptime |
mailx -s “cpu” root ✓ MEM → free | mailx -s “mem” root ✓ DISK → (df -h; du -sh /home/*) | mailx -s “disk” root ✓ PROC → (ps -ef | grep important) | mailx -s root ✓ SYS → ping -c 4 google.com | mailx -s root

@sebamontini MEDALLIA OK: x < something

@sebamontini MEDALLIA WARN: something < x < something

@sebamontini MEDALLIA CRITICAL: x > something

@sebamontini MEDALLIA Observability

@sebamontini MEDALLIA A system is observable if you can determine
the behavior of the system based on it’s outputs.

@sebamontini MEDALLIA A system is a set of connected components.

@sebamontini MEDALLIA The manner in which a system acts is
it’s behavior.

@sebamontini MEDALLIA The outputs of a system are the concrete
results of it’s behaviors.

@sebamontini MEDALLIA Monitoring is the action of observing and checking
the behavior and outputs of a system and it’s components over time.

@sebamontini MEDALLIA The (real) big 5

@sebamontini MEDALLIA Instrumentation Collection Storage Alerting Visualization

@sebamontini MEDALLIA Instrumentation

@sebamontini MEDALLIA Gauges Counters Histogram Timers

@sebamontini MEDALLIA Gauges A gauge is an instantaneous measurement of
a value. For example, we may want to measure the number of pending jobs in a queue

@sebamontini MEDALLIA Counters A counter is just a gauge that
you can increment or decrement its value. For example, we may want a more efficient way of measuring the pending job in a queue

@sebamontini MEDALLIA Histogram A histogram measures the statistical distribution of
values in a stream of data like median or percentiles

@sebamontini MEDALLIA Timers A timer measures both the rate that
a particular piece of code is called and the distribution of its duration.

@sebamontini MEDALLIA Collection

@sebamontini MEDALLIA Storage

@sebamontini MEDALLIA Alerting

@sebamontini MEDALLIA Thresholds Dead man Delta Anomaly detection

@sebamontini MEDALLIA Visualization

@sebamontini MEDALLIA The big 5 ✓ Instrumentation → gauges, histograms,
timers, counters ✓ Collection → pull vs push ✓ Storage → Time Series DB ✓ Alerting → threshold, flatline, delta, anomaly ✓ Visualization → dashboards

@sebamontini MEDALLIA The Four Golden Signals

@sebamontini MEDALLIA Latency Traffic Errors Saturation

@sebamontini MEDALLIA Thanks

Monitoring is dead

Monitoring is dead

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