Jvm Metrics 信息采集

最新推荐文章于 2025-06-27 18:34:24 发布

转载最新推荐文章于 2025-06-27 18:34:24 发布 · 461 阅读

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原文链接：https://my.oschina.net/u/3209870/blog/829046

文章标签：

#java #runtime #python

本文介绍了一个Java程序，用于收集和展示JVM的内存使用情况、垃圾回收统计和线程状态等关键性能指标。

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收集JVM的相关信息

import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.List;

public class JvmMetricsInfo {
	
	static final MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
	static final List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
	static final ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();

	static float M = 1024 * 1024;

	public static void getMemoryUsage() {
		MemoryUsage memNonHeap = memoryMXBean.getNonHeapMemoryUsage();
		MemoryUsage memHeap = memoryMXBean.getHeapMemoryUsage();
		Runtime runtime = Runtime.getRuntime();
		System.out.println(JvmInfoEnum.MemNonHeapUsedM + ": " + memNonHeap.getUsed() / M);
		System.out.println(JvmInfoEnum.MemNonHeapCommittedM + ": " + memNonHeap.getCommitted() / M);
		System.out.println(JvmInfoEnum.MemNonHeapMaxM + ": " + memNonHeap.getMax() / M);
		System.out.println(JvmInfoEnum.MemHeapUsedM + ": " + memHeap.getUsed() / M);
		System.out.println(JvmInfoEnum.MemHeapCommittedM + ": " + memHeap.getCommitted() / M);
		System.out.println(JvmInfoEnum.MemHeapMaxM + ": " + memHeap.getMax() / M);
		System.out.println(JvmInfoEnum.MemMaxM + ": " + runtime.maxMemory() / M);
	}

	public static void getGcUsage() {
		long count = 0;
		long timeMillis = 0;
		for (GarbageCollectorMXBean gcBean : gcBeans) {
			long c = gcBean.getCollectionCount();
			long t = gcBean.getCollectionTime();
			count += c;
			timeMillis += t;
		}
		System.out.println(JvmInfoEnum.GcCount + ": " + count);
		System.out.println(JvmInfoEnum.GcTimeMillis + ": " + timeMillis);
	}

	public static void getThreadUsage() {
		int threadsNew = 0;
		int threadsRunnable = 0;
		int threadsBlocked = 0;
		int threadsWaiting = 0;
		int threadsTimedWaiting = 0;
		int threadsTerminated = 0;
		long threadIds[] = threadMXBean.getAllThreadIds();
		for (ThreadInfo threadInfo : threadMXBean.getThreadInfo(threadIds, 0)) {
			if (threadInfo == null) continue; // race protection 
		      switch (threadInfo.getThreadState()) { 
		        case NEW:           threadsNew++;           break; 
		        case RUNNABLE:      threadsRunnable++;      break; 
		        case BLOCKED:       threadsBlocked++;       break; 
		        case WAITING:       threadsWaiting++;       break; 
		        case TIMED_WAITING: threadsTimedWaiting++;  break; 
		        case TERMINATED:    threadsTerminated++;    break; 
		      } 
		}
		System.out.println(JvmInfoEnum.ThreadsNew + ": " + threadsNew);
		System.out.println(JvmInfoEnum.ThreadsRunnable + ": " + threadsRunnable);
		System.out.println(JvmInfoEnum.ThreadsBlocked + ": " + threadsBlocked);
		System.out.println(JvmInfoEnum.ThreadsWaiting + ": " + threadsWaiting);
		System.out.println(JvmInfoEnum.ThreadsTimedWaiting + ": " + threadsTimedWaiting);
		System.out.println(JvmInfoEnum.ThreadsTerminated + ": " + threadsTerminated);
	}
	
	
	enum JvmInfoEnum {
		JvmInfo("JVM related info etc."), // record info 
		MemNonHeapUsedM("Non-heap memory used in MB"), 
		MemNonHeapCommittedM("Non-heap memory committed in MB"), 
		MemNonHeapMaxM("Non-heap memory max in MB"), 
		MemHeapUsedM("Heap memory used in MB"), 
		MemHeapCommittedM("Heap memory committed in MB"), 
		MemHeapMaxM("Heap memory max in MB"), 
		MemMaxM("Max memory size in MB"), 
		GcCount("Total GC count"), 
		GcTimeMillis("Total GC time in milliseconds"), 
		ThreadsNew("Number of new threads"), 
		ThreadsRunnable("Number of runnable threads"), 
		ThreadsBlocked("Number of blocked threads"), 
		ThreadsWaiting("Number of waiting threads"), 
		ThreadsTimedWaiting("Number of timed waiting threads"), 
		ThreadsTerminated("Number of terminated threads"), 
		LogFatal("Total number of fatal log events"), 
		LogError("Total number of error log events"), 
		LogWarn("Total number of warning log events"), 
		LogInfo("Total number of info log events");   
		
		private final String desc; 
		
		JvmInfoEnum(String desc) { this.desc = desc; } 
		
		public String description() { return desc; }
	}


}

转载于:https://my.oschina.net/u/3209870/blog/829046