query

Documentation

Index

• type Metric
  • func NewMetric() *Metric
  • func (m Metric) When() time.Time

Types

type Metric

type Metric struct {
	Timestamp      time.Time     // time the metric was started
	WaitLatency    time.Duration // time that we had to wait before starting query execution
	ExecuteLatency time.Duration // time the query took to execute
	Err            error         // any error resulting from the query execution
}

Metric records query metrics of backend writes that go through a sized channel. It allows us to compare the time waiting to execute the query against the time needed to run it and in a "sized channel" the wait time may be significant and is good to measure.

func NewMetric

func NewMetric() *Metric

NewMetric returns a new metric with timestamp starting from now

func (Metric) When

func (m Metric) When() time.Time

When records the timestamp of the start of the recording