Package org.apache.solr.util.stats

Utilities for collecting statistics

See: Description

Interface Summary

Interface	Description
Sample	A statistically representative sample of a data stream.

Class Summary

Class	Description
Clock	An abstraction for how time passes.
Clock.CpuTimeClock	A clock implementation which returns the current thread's CPU time.
Clock.UserTimeClock	A clock implementation which returns the current time in epoch nanoseconds.
EWMA	An exponentially-weighted moving average.
ExponentiallyDecayingSample	An exponentially-decaying random sample of longs.
Histogram	A metric which calculates the distribution of a value.
Meter	A meter metric which measures mean throughput and one-, five-, and fifteen-minute exponentially-weighted moving average throughputs.
Snapshot	A statistical snapshot of a Snapshot.
Timer	A timer metric which aggregates timing durations and provides duration statistics, plus throughput statistics via Meter.
TimerContext	A timing context.
UniformSample	A random sample of a stream of longs.

Package org.apache.solr.util.stats Description

Utilities for collecting statistics