What is Tail latency?

The slow end of the response-time distribution, such as the 99th percentile, which governs overall latency when a task waits on many components.

Field: Performance Analysis

Tail latency in the explanations

Questions that mention Tail latency (1)

  1. When evaluating web service response times, why is the 99th percentile (the boundary of the slowest 1%) often examined in addition to the mean?

Related terms

Benchmark CPU time Cycles per instruction (CPI) Flame graph Geometric mean Gustafson's law Harmonic mean Little's law Microbenchmark Parallel efficiency

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