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Module 4 · Memory + profiling · Recap
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Logging vs metrics vs tracing
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📝 **Question:** Right tool for 'p95 latency over the last 24h'? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
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📝 **Question:** Right tool for 'p95 latency over the last 24h'? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
A
Logs — grep for `duration_ms=*` and pipe through `awk` to compute quantiles per minute.
B
Metrics — pre-aggregated histograms, cheap to query over time windows.
C
Tracing — open Jaeger and visually scan the 24h timeline for slow spans.
D
Database — store raw latency rows and run a Postgres `percentile_cont` query.
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