以下是使用Java代码获取内存占用量的示例: importjava.lang.management.ManagementFactory;importcom.sun.management.OperatingSystemMXBean;publicclassMemoryUsageMonitor{publicstaticlonggetTotalMemorySize(){OperatingSystemMXBeanosBean=ManagementFactory.getOperatingSystemMXBean();returnosBean.getTotalPhysicalMemorySize();}pu...
Parallel GC with 4 thread(s)//GC 方式 Heap Configuration: //堆内存初始化配置 MinHeapFreeRatio = 0 //对应jvm启动参数-XX:MinHeapFreeRatio设置JVM堆最小空闲比率(default 40) MaxHeapFreeRatio = 100 //对应jvm启动参数 -XX:MaxHeapFreeRatio设置JVM堆最大空闲比率(default 70) MaxHeapSize = 208247193...
// Bit-format of an object header (most significant first, big endian layout below):/// 32 bits:// ---// hash:25 --->| age:4 biased_lock:1 lock:2 (normal object)// JavaThread*:23 epoch:2 age:4 biased_lock:1 lock:2 (biased object)// size:32 --->| (CMS free block)//...
(kubectl get node --context prod -o wide) <(kubectl top node --context prod) ...
ImagingOpException, IndexOutOfBoundsException, MissingResourceException, NegativeArraySizeException, NoSuchElementException, NullPointerException, ProfileDataException, ProviderException, RasterFormatException, SecurityException, SystemException, UndeclaredThrowableException, UnmodifiableSetException, UnsupportedOperationException...
Jstat是JDK自带的一个轻量级小工具。全称“JavaVirtual Machine statistics monitoring tool”,主要利用JVM内建的指令对Java应用程序的资源和性能进行实时的命令行的监控,包括了对Heap size和垃圾回收状况的监控。可见,Jstat是轻量级的、专门针对JVM的工具,非常适用。
TCP window size: 85.3 KByte (default) 1. 2. 3. 4. 这是一台上下行带宽都接近100Mbits/sec的服务器,实测数值不应该与该数值偏离太远。 客户端 测试上行和下行带宽 $iperf -c 106.14.26.11 -t 60 -d --- Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) --- ---...
long waitTime = now + getIdleWaitTime(); long timeUntilContinue = waitTime - now; synchronized(sigLock) { try { if(!halted.get()) { sigLock.wait(timeUntilContinue); } } catch (InterruptedException ignore) { } } 它是轮询任务的空闲等待代码,上面的sigLock.wait(timeUntilContinue)就对应了...
javax.management.monitor.GaugeMonitor 实现的所有接口 MBeanRegistration,GaugeMonitorMBean,MonitorMBean,NotificationBroadcaster,NotificationEmitter public classGaugeMonitorextendsMonitorimplementsGaugeMonitorMBean 定义用于观察gauge属性值的监视器MBean。 仪表监视器观察随时间不断变化的属性。仪表监视器发送通知如下: ...
IllegalBlockSizeException IllegalCharsetNameException IllegalClassFormatException IllegalComponentStateException IllegalFormatCodePointException IllegalFormatConversionException IllegalFormatException IllegalFormatFlagsException IllegalFormatPrecisionException IllegalFormatWidthException IllegalMonitorStateException ...