A quick dive into search system metrics

Oliver K. Ernst, Ph.D.
Practical coding
Published in
3 min readAug 30, 2023

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A quick breakdown of some search system metrics.

Source: author

MRR = Mean reciprocal rank

Essentially: consider the rank of the 1st relevant item, then average.

  • Pro: easy to interpret
  • Con: Only 1st result is considered

Recall@k

  • Con: can be very many relevant…

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