The Hidden Tail
A histogram preserves the shape of your traffic.
The average says everyone is fine. But the shape tells a different story.
197 ms
average response time
healthy
The average says 197ms. Is everything healthy?
Which percentile would catch this problem?
Why do teams alert on percentiles instead of averages?
Outliers
An average smooths away the pain of the few. Percentiles expose it.
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