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Monitoring is dead
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Sebastian Montini
September 21, 2018
Technology
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Monitoring is dead
Sebastian Montini
September 21, 2018
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Transcript
@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
@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 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 A system is observable if you can determine
the behavior of the system based on it’s outputs.
@sebamontini MEDALLIA The manner in which a system acts is
it’s behavior.
@sebamontini MEDALLIA A system is observable if you can determine
the behavior of the system based on it’s outputs.
@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
@sebamontini MEDALLIA Storage
@sebamontini MEDALLIA Storage
@sebamontini MEDALLIA Alerting
@sebamontini MEDALLIA Thresholds Dead man Delta Anomaly detection
@sebamontini MEDALLIA Visualization
@sebamontini MEDALLIA
@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
@sebamontini MEDALLIA The Four Golden Signals
@sebamontini MEDALLIA Latency Traffic Errors Saturation
@sebamontini MEDALLIA Thanks