Package org.apache.hadoop.metrics2

Interface MetricHistogram

All Known Implementing Classes:

MutableHistogram, MutableRangeHistogram, MutableSizeHistogram, MutableTimeHistogram

@Private
public interface MetricHistogram

Metrics Histogram interface. Implementing classes will expose computed quartile values through the metrics system.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	MAX_METRIC_NAME
static final String	MEAN_METRIC_NAME
static final String	MEDIAN_METRIC_NAME
static final String	MIN_METRIC_NAME
static final String	NINETIETH_PERCENTILE_METRIC_NAME
static final String	NINETY_EIGHTH_PERCENTILE_METRIC_NAME
static final String	NINETY_FIFTH_PERCENTILE_METRIC_NAME
static final String	NINETY_NINE_POINT_NINETH_PERCENTILE_METRIC_NAME
static final String	NINETY_NINETH_PERCENTILE_METRIC_NAME
static final String	NUM_OPS_METRIC_NAME
static final String	SEVENTY_FIFTH_PERCENTILE_METRIC_NAME
static final String	TWENTY_FIFTH_PERCENTILE_METRIC_NAME

Method Summary

Modifier and Type	Method	Description
void	add(long value)	Add a single value to a histogram's stream of values.
long	getCount()	Return the total number of values added to the histogram.

Field Details

NUM_OPS_METRIC_NAME

static final String NUM_OPS_METRIC_NAME

See Also:

• Constant Field Values

MIN_METRIC_NAME

static final String MIN_METRIC_NAME

See Also:

• Constant Field Values

MAX_METRIC_NAME

static final String MAX_METRIC_NAME

See Also:

• Constant Field Values

MEAN_METRIC_NAME

static final String MEAN_METRIC_NAME

See Also:

• Constant Field Values

MEDIAN_METRIC_NAME

static final String MEDIAN_METRIC_NAME

See Also:

• Constant Field Values

TWENTY_FIFTH_PERCENTILE_METRIC_NAME

static final String TWENTY_FIFTH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

SEVENTY_FIFTH_PERCENTILE_METRIC_NAME

static final String SEVENTY_FIFTH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

NINETIETH_PERCENTILE_METRIC_NAME

static final String NINETIETH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

NINETY_FIFTH_PERCENTILE_METRIC_NAME

static final String NINETY_FIFTH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

NINETY_EIGHTH_PERCENTILE_METRIC_NAME

static final String NINETY_EIGHTH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

NINETY_NINETH_PERCENTILE_METRIC_NAME

static final String NINETY_NINETH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

NINETY_NINE_POINT_NINETH_PERCENTILE_METRIC_NAME

static final String NINETY_NINE_POINT_NINETH_PERCENTILE_METRIC_NAME

See Also:

• Constant Field Values

Method Details

add

void add(long value)

Add a single value to a histogram's stream of values.

Parameters:

value - the value to add

getCount

long getCount()

Return the total number of values added to the histogram.

Returns:

the total number of values.