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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type EWMA ¶
EWMAs continuously calculate an exponentially-weighted moving average based on an outside source of clock ticks.
func NewEWMA1 ¶
func NewEWMA1() EWMA
NewEWMA1 constructs a new EWMA for a one-minute moving average.
type EWMASnapshot ¶
type EWMASnapshot float64
EWMASnapshot is a read-only copy of another EWMA.
func (EWMASnapshot) Rate ¶
func (a EWMASnapshot) Rate() float64
Rate returns the rate of events per second at the time the snapshot was taken.
type StandardEWMA ¶
type StandardEWMA struct {
// contains filtered or unexported fields
}
StandardEWMA is the standard implementation of an EWMA and tracks the number of uncounted events and processes them on each tick. It uses the sync/atomic package to manage uncounted events.
func (*StandardEWMA) Rate ¶
func (a *StandardEWMA) Rate() float64
Rate returns the moving average rate of events per second.
func (*StandardEWMA) Snapshot ¶
func (a *StandardEWMA) Snapshot() EWMA
Snapshot returns a read-only copy of the EWMA.
func (*StandardEWMA) Tick ¶
func (a *StandardEWMA) Tick()
Tick ticks the clock to update the moving average. It assumes it is called every five seconds.
func (*StandardEWMA) Update ¶
func (a *StandardEWMA) Update(n int64)
Update adds n uncounted events.
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