Package org.apache.druid.server.metrics

Class SegmentStatsMonitor

java.lang.Object

org.apache.druid.java.util.metrics.AbstractMonitor

org.apache.druid.server.metrics.SegmentStatsMonitor

All Implemented Interfaces:

org.apache.druid.java.util.metrics.Monitor

public class SegmentStatsMonitor
extends org.apache.druid.java.util.metrics.AbstractMonitor

An experimental monitor used to keep track of segment stats. Can only be used on a historical and cannot be used with lazy loading. It keeps track of the average number of rows in a segment and the distribution of segments according to rowCount.

Constructor Summary

Constructors

Constructor	Description
SegmentStatsMonitor(DruidServerConfig serverConfig, SegmentLoadDropHandler segmentLoadDropHandler, SegmentLoaderConfig segmentLoaderConfig)	Constructor for this monitor.

Method Summary

Modifier and Type	Method	Description
boolean	doMonitor(org.apache.druid.java.util.emitter.service.ServiceEmitter emitter)

Methods inherited from class org.apache.druid.java.util.metrics.AbstractMonitor

isStarted, monitor, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

SegmentStatsMonitor

@Inject
public SegmentStatsMonitor(DruidServerConfig serverConfig,
                           SegmentLoadDropHandler segmentLoadDropHandler,
                           SegmentLoaderConfig segmentLoaderConfig)

Constructor for this monitor. Will throw IllegalStateException if lazy load on start is set to true.

Parameters:

serverConfig -

segmentLoadDropHandler -

segmentLoaderConfig -

Method Detail

doMonitor

public boolean doMonitor(org.apache.druid.java.util.emitter.service.ServiceEmitter emitter)

Specified by:

doMonitor in class org.apache.druid.java.util.metrics.AbstractMonitor