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Type:
Task
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
Two things that are probably worth clarifying:
- The 5% threshold is not configurable. It is thought to be a good approximation of the cutoff value where scanning the entire collection will be faster than that many random I/Os.
- If we are not under the 5% threshold, it's worth saying that we will do a top-k sort (where k = sample size) by a generated random value. This top-k sort can possibly spill to disk if K documents are larger than 100MB, and so allowDiskUse may need to be used.
- related to
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SERVER-72518 Make 5% random-cursor $sample cutoff configurable
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- Closed
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