Latency
The fiftieth and ninety-ninth percentiles mark different positions in an ordered latency distribution. The first locates the middle of the distribution, while the second exposes delays near the slow tail.
Median latency can stay stable while a small group of requests waits much longer. Queueing, variable sequence lengths, retries, and resource contention often widen the distance between typical and tail behavior.
Teams compute both percentiles from the same scoped request population and time window. They keep failed or cancelled requests visible in the method because filtering can make the tail look better.
The fiftieth and ninety-ninth percentiles mark different positions in an ordered latency distribution. The first locates the middle of the distribution, while the second exposes delays near the slow tail. Teams compute both percentiles from the same scoped request population and time window. They keep failed or cancelled requests visible in the method because filtering can make the tail look better.
Median latency can stay stable while a small group of requests waits much longer. Queueing, variable sequence lengths, retries, and resource contention often widen the distance between typical and tail behavior.
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