Performance Budgets
Targets enforced in CI so regressions fail the build.
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This topic is part of the curriculum but has no questions, cards or glossary entries so far. The rest of Performance & Capacity Engineering may still cover what you are looking for.
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Performance & Capacity
General material on performance and capacity engineering.
Latency
Distributions rather than averages, and the floors physics imposes.
No content yetThroughput
Work completed per unit time, and why it trades against latency.
No content yetConcurrency
Operations in flight, and the limits that are the real capacity ceiling.
No content yetQueueing Theory
Why latency explodes as utilisation approaches capacity.
No content yetLittle's Law
L = λW, and the pool sizes it computes directly.
No content yetBottleneck Analysis
Finding the constraint, and expecting a second one behind it.
No content yetTail Latency
p99 behaviour, amplification across fan-out, and hedged requests.
No content yetLoad Testing
Realistic data, realistic mix, and a ramp rather than a step.
No content yetStress Testing
Pushing past target to learn what breaks first and how it fails.
No content yetSoak Testing
Long runs that surface leaks and slow degradation.
No content yetCapacity Modelling
Arithmetic before load tests, and headroom for failure as well as peak.
No content yetHorizontal vs Vertical Scaling
Scale out for stateless, scale up first for stateful.
No content yetCaching for Performance
Layer choice, hit ratio as a first-class metric, and cold-cache recovery.
No content yetDatabase Performance
Plans, indexes, contention and the pool in front of the database.
No content yetConnection Pooling
The most common hidden ceiling, and the metric nobody collects.
Network Performance Tuning
Keep-alive, compression, payload size and round-trip elimination.
No content yetProfiling & Optimisation
Measuring before optimising, and optimising the dominant term.
No content yetPeak Event Readiness
Freeze, pre-scale, shed order, warm caches and rehearse.
No content yet