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mosn.io/mosn
pkg
metrics
ewma
package
Version:
v1.6.0
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Published: Aug 17, 2023
License: Apache-2.0
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Imports: 4
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Imported by: 0
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Documentation
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Alpha the alpha needed to decay 1 to negligible (less than target) over a given duration.
(1 - alpha) ^ duration = target ==> alpha = 1 - target ^ (1 / duration).
NewEWMA constructs a new EWMA with the given alpha.
EWMA is the standard EWMA implementation, it updates in real time
and when queried it always returns the decayed value.
See: https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
Rate returns the moving average mean of events per second.
Snapshot returns a read-only copy of the EWMA.
Tick ticks the clock to update the moving average.
There is no need to use an additional timer to Tick in this implementation,
because Rate also calculates the latest value when it is updated or queried.
Update adds an uncounted event with value `i`, and tries to flush.
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