case class TopPctLogic[K](heavyHittersPct: Double) extends HeavyHittersLogic[K] with Product with Serializable
Finds all heavy hitters, i.e., elements in the stream that appear at least (heavyHittersPct * totalCount) times.
Every item that appears at least (heavyHittersPct * totalCount) times is output, and with probability
p >= 1 - delta, no item whose count is less than (heavyHittersPct - eps) * totalCount is output.
This also means that this parameter is an upper bound on the number of heavy hitters that will be tracked: the set
of heavy hitters contains at most 1 / heavyHittersPct elements. For example, if heavyHittersPct=0.01 (or
0.25), then at most 1 / 0.01 = 100 items (or 1 / 0.25 = 4 items) will be tracked/returned as heavy hitters.
This parameter can thus control the memory footprint required for tracking heavy hitters.
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- new TopPctLogic(heavyHittersPct: Double)
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- val heavyHittersPct: Double
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- def purgeHeavyHitters(cms: CMS[K])(hitters: HeavyHitters[K]): HeavyHitters[K]
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- def updateHeavyHitters(cms: CMS[K])(left: HeavyHitters[K], right: HeavyHitters[K]): HeavyHitters[K]
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- def updateHeavyHitters(oldCms: CMS[K], newCms: CMS[K])(hhs: HeavyHitters[K], item: K, count: Long): HeavyHitters[K]
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