Package com.linkedin.venice.stats

Class TehutiUtils

java.lang.Object

com.linkedin.venice.stats.TehutiUtils

public class TehutiUtils
extends Object

Utils for venice metrics

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TehutiUtils.RatioStat	Generate a ratio stat that is based on two arbitrary Rate.
static class	TehutiUtils.SimpleRatioStat	Generate a ratio stat that is based on two arbitrary MeasurableStat.

Constructor Summary

Constructors

Constructor	Description
TehutiUtils()

Method Summary

Modifier and Type	Method	Description
static String	fixMalformedMetricName(String metricName)	A valid metric name needs to pass the test in ObjectName.
static io.tehuti.metrics.stats.Percentiles	getFineGrainedPercentileStat(String name, int sizeInBytes, double max)
static io.tehuti.metrics.stats.Percentiles	getFineGrainedPercentileStat(String sensorName, String storeName)
static io.tehuti.metrics.MeasurableStat[]	getFineGrainedPercentileStatWithAvgAndMax(String sensorName, String storeName)
static io.tehuti.metrics.MetricsRepository	getMetricsRepository(String serviceName)	Get default MetricRepository.
static io.tehuti.metrics.stats.Percentiles	getPercentileStat(String name)	Generate a histogram stat that emits P50, P95, and P99 values.
static io.tehuti.metrics.stats.Percentiles	getPercentileStat(String name, int sizeInBytes, double max)	Generate a histogram stat that emits P50, P95, and P99 values.
static io.tehuti.metrics.stats.Percentiles	getPercentileStat(String name, int sizeInBytes, double max, double... percentiles)
static io.tehuti.metrics.stats.Percentiles	getPercentileStat(String sensorName, String storeName)	TODO: need to investigate why percentiles with big values (> 10^6) won't show in InGraph.
static io.tehuti.metrics.stats.Percentiles	getPercentileStatForNetworkLatency(String sensorName, String storeName)	Generate a histogram stat that emits P50, P77, P90, P95, P99 and P99.9 values.
static io.tehuti.metrics.MeasurableStat[]	getPercentileStatWithAvgAndMax(String sensorName, String storeName)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TehutiUtils

public TehutiUtils()

Method Details

getPercentileStat

public static io.tehuti.metrics.stats.Percentiles getPercentileStat(String sensorName,
 String storeName)

TODO: need to investigate why percentiles with big values (> 10^6) won't show in InGraph.

getPercentileStatWithAvgAndMax

public static io.tehuti.metrics.MeasurableStat[] getPercentileStatWithAvgAndMax(String sensorName,
 String storeName)

getFineGrainedPercentileStatWithAvgAndMax

public static io.tehuti.metrics.MeasurableStat[] getFineGrainedPercentileStatWithAvgAndMax(String sensorName,
 String storeName)

getFineGrainedPercentileStat

public static io.tehuti.metrics.stats.Percentiles getFineGrainedPercentileStat(String sensorName,
 String storeName)

getPercentileStatForNetworkLatency

public static io.tehuti.metrics.stats.Percentiles getPercentileStatForNetworkLatency(String sensorName,
 String storeName)

Generate a histogram stat that emits P50, P77, P90, P95, P99 and P99.9 values. N.B.: These are useful percentiles to estimate the latency we would get with speculative queries: P77 latency with one query would become: P95 with the fastest of two queries, and P99 with the fastest of three P90 latency with one query would become: P99 with the fastest of two queries, and P99.9 with the fastest of three

getPercentileStat

public static io.tehuti.metrics.stats.Percentiles getPercentileStat(String name)

Generate a histogram stat that emits P50, P95, and P99 values.

Parameters:

name -

Returns:

3 sub stats that emit p50, P95, and P99 values.

getPercentileStat

public static io.tehuti.metrics.stats.Percentiles getPercentileStat(String name,
 int sizeInBytes,
 double max)

Generate a histogram stat that emits P50, P95, and P99 values.

Parameters:

name -

sizeInBytes - Histogram's memory consumption

max - Histogram's max value

Returns:

3 sub stats that emit p50, P95, and P99 values.

getFineGrainedPercentileStat

public static io.tehuti.metrics.stats.Percentiles getFineGrainedPercentileStat(String name,
 int sizeInBytes,
 double max)

getPercentileStat

public static io.tehuti.metrics.stats.Percentiles getPercentileStat(String name,
 int sizeInBytes,
 double max,
 double... percentiles)

getMetricsRepository

public static io.tehuti.metrics.MetricsRepository getMetricsRepository(String serviceName)

Get default MetricRepository. It will emit metrics via JMX.

Parameters:

serviceName - Prefix name of all emitted metrics

Returns:

fixMalformedMetricName

public static String fixMalformedMetricName(String metricName)

A valid metric name needs to pass the test in ObjectName. This helper function will try to fix all invalid character mentioned in the above function to avoid MalformedObjectNameException; besides, dot(.) will also be replaced since dot is a separator used in InGraph.