Gibt es Log-jvm-GC-Aktivität mit MBean?

Question

Ist es möglich, log jvm GC-Aktivität, CPU-Nutzung oder andere jvm Informationen mit MBean? Wenn das so ist, wie?

Answer 1

ClassLoadingMXBean clMxBean = ManagementFactory.getClassLoadingMXBean(); 

    System.out.println("loadedClassCount:" + clMxBean.getLoadedClassCount()); 
    System.out.println("totalLoadedClassCount:" + clMxBean.getTotalLoadedClassCount()); 
    System.out.println("unloadedClassCount:" + clMxBean.getUnloadedClassCount()); 

    List<GarbageCollectorMXBean> gcMxBeans = ManagementFactory.getGarbageCollectorMXBeans(); 
    for(GarbageCollectorMXBean gcMxBean : gcMxBeans) 
    { 
     System.out.println("\ngcMxBean: " + gcMxBean.getName() + 
       ", collection count:" + gcMxBean.getCollectionCount() + 
        ", Collection time:" + gcMxBean.getCollectionTime() + 
       ", Memory Pool Names:" + Arrays.deepToString(gcMxBean.getMemoryPoolNames()) ); 
    } 

    OperatingSystemMXBean osMxBean = ManagementFactory.getOperatingSystemMXBean(); 
    double systemLoadAverageInLast1Minute = osMxBean.getSystemLoadAverage(); 
    int availableProcessors = osMxBean.getAvailableProcessors(); 
    System.out.println("\nlast 1 minute load average over all CPUs: " + systemLoadAverageInLast1Minute); 
    System.out.println("last 1 minute load average per CPU: " + (systemLoadAverageInLast1Minute/availableProcessors));