Examples of java.lang.management.MemoryMXBean

java.lang.management.MemoryMXBean
le notification .... } } MemoryMXBean mbean = ManagementFactory.getMemoryMXBean(); NotificationEmitter emitter = (NotificationEmitter) mbean; MyListener listener = new MyListener(); emitter.addNotificationListener(listener, null, null); @see JMX Specification. @see Ways to Access MXBeans @author Mandy Chung @version 1.16, 03/08/06 @since 1.5

      out.write('\n');
      out.write('\n');


  JobTracker tracker = (JobTracker) application.getAttribute("job.tracker");
  ClusterStatus status = tracker.getClusterStatus();
  MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
  ClusterMetrics metrics = tracker.getClusterMetrics();
  String trackerName = 
           StringUtils.simpleHostname(tracker.getJobTrackerMachine());
  JobQueueInfo[] queues = tracker.getJobQueues();
  List<JobInProgress> runningJobs = tracker.getRunningJobs();
  List<JobInProgress> completedJobs = tracker.getCompletedJobs();
  List<JobInProgress> failedJobs = tracker.getFailedJobs();


      out.write('\n');
      out.write("\n\n\n<html>\n<head>\n<title>");
      out.print( trackerName );
      out.write(" Hadoop Map/Reduce Administration</title>\n<link rel=\"stylesheet\" type=\"text/css\" href=\"/static/hadoop.css\">\n<script type=\"text/javascript\" src=\"/static/jobtracker.js\"></script>\n</head>\n<body>\n\n");
 if (!JSPUtil.processButtons(request, response, tracker)) {
     return;// user is not authorized
   }


      out.write("\n\n<h1>");
      out.print( trackerName );
      out.write(" Hadoop Map/Reduce Administration</h1>\n\n<div id=\"quicklinks\">\n  <a href=\"#quicklinks\" onclick=\"toggle('quicklinks-list'); return false;\">Quick Links</a>\n  <ul id=\"quicklinks-list\">\n    <li><a href=\"#running_jobs\">Running Jobs</a></li>\n    <li><a href=\"#retired_jobs\">Retired Jobs</a></li>\n    <li><a href=\"#local_logs\">Local Logs</a></li>\n  </ul>\n</div>\n\n<b>State:</b> ");
      out.print( status.getJobTrackerStatus() );
      out.write("<br>\n<b>Started:</b> ");
      out.print( new Date(tracker.getStartTime()));
      out.write("<br>\n<b>Version:</b> ");
      out.print( VersionInfo.getVersion());
      out.write(",\n                ");
      out.print( VersionInfo.getRevision());
      out.write("<br>\n<b>Compiled:</b> ");
      out.print( VersionInfo.getDate());
      out.write(" by \n                 ");
      out.print( VersionInfo.getUser());
      out.write(" from\n                 ");
      out.print( VersionInfo.getBranch());
      out.write("<br>\n<b>Identifier:</b> ");
      out.print( tracker.getTrackerIdentifier());
      out.write("<br>                 \n                   \n<hr>\n<h2>Cluster Summary (Heap Size is\n    ");
 MemoryUsage heap = mem.getHeapMemoryUsage();
       out.print(StringUtils.byteDesc(heap.getUsed()) + "/");
       out.print(StringUtils.byteDesc(heap.getCommitted()) + "/");
       out.print(StringUtils.byteDesc(heap.getMax()) + ")");
    
      out.write('\n');

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        }
    }
    


    public void dumpHeapSun(String heapName){
        final MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
        final OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
        final MBeanServer platformBean = ManagementFactory.getPlatformMBeanServer();
        
        HotSpotDiagnosticMXBean bean = null;

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    memstore = new MemStore(conf, KeyValue.COMPARATOR);


    int ROW_SIZE = 2048;
    byte[] qualifier = new byte[ROW_SIZE - 4];


    MemoryMXBean bean = ManagementFactory.getMemoryMXBean();
    for (int i = 0; i < 3; i++) { System.gc(); }
    long usageBefore = bean.getHeapMemoryUsage().getUsed();


    long size = 0;
    long ts=0;


    for (int newValue = 0; newValue < 1000; newValue++) {
      for (int row = newValue; row < newValue + 1000; row++) {
        byte[] rowBytes = Bytes.toBytes(row);
        size += memstore.updateColumnValue(rowBytes, FAMILY, qualifier, newValue, ++ts);
      }
    }
    System.out.println("Wrote " + ts + " vals");
    for (int i = 0; i < 3; i++) { System.gc(); }
    long usageAfter = bean.getHeapMemoryUsage().getUsed();
    System.out.println("Memory used: " + (usageAfter - usageBefore)
        + " (heapsize: " + memstore.heapSize() +
        " size: " + size + ")");
  }

View Full Code Here

    /*
     * Test method for
     * 'java.lang.management.ManagementFactory.getMemoryMXBean()'
     */
    public void testGetMemoryMXBean() {
        MemoryMXBean mb = ManagementFactory.getMemoryMXBean();
        assertNotNull(mb);


        // Verify that there is only instance of this bean
        MemoryMXBean mb2 = ManagementFactory.getMemoryMXBean();
        assertNotNull(mb2);
        assertSame(mb, mb2);
    }

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     * Test method for
     * 'java.lang.management.ManagementFactory.newPlatformMXBeanProxy(MBeanServerConnection,
     * String, Class<T>) <T>'
     */
    public void testNewPlatformMXBeanProxy_MemoryMXBean() throws Exception {
        MemoryMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(
                ManagementFactory.getPlatformMBeanServer(),
                "java.lang:type=Memory", MemoryMXBean.class);
        assertNotNull(proxy);
        MemoryMXBean mb = ManagementFactory.getMemoryMXBean();
        // RI's MemoryUsage does not appear to override equals() so we have to
        // go the long way round to check that the answers match...
        MemoryUsage mu1 = mb.getHeapMemoryUsage();
        MemoryUsage mu2 = proxy.getHeapMemoryUsage();
        assertEquals(mu1.getInit(), mu2.getInit());
        assertEquals(mu1.getMax(), mu2.getMax());


        mu1 = mb.getNonHeapMemoryUsage();
        mu2 = proxy.getNonHeapMemoryUsage();
        assertEquals(mu1.getInit(), mu2.getInit());
        assertEquals(mu1.getMax(), mu2.getMax());


        assertEquals(mb.isVerbose(), proxy.isVerbose());
        // changes made to proxy should be seen in the "real bean" and
        // vice versa
        boolean initialValue = proxy.isVerbose();
        mb.setVerbose(!initialValue);
        assertEquals(!initialValue, proxy.isVerbose());
        proxy.setVerbose(initialValue);
        assertEquals(initialValue, mb.isVerbose());
    }

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        return kernel.getBootTime();
    }


    public Stats getStats() {
        RuntimeMXBean runmxbean = ManagementFactory.getRuntimeMXBean();
        MemoryMXBean memmxbean = ManagementFactory.getMemoryMXBean();
        MemoryUsage memUsage = memmxbean.getHeapMemoryUsage();
        CountStatisticImpl upTime;
        BoundedRangeStatisticImpl heapSize;
        
        if (stats == null) {
            stats = new JVMStatsImpl();

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    memstore = new MemStore(conf, KeyValue.COMPARATOR);
    
    int ROW_SIZE = 2048;
    byte[] qualifier = new byte[ROW_SIZE - 4];
    
    MemoryMXBean bean = ManagementFactory.getMemoryMXBean();
    for (int i = 0; i < 3; i++) { System.gc(); }
    long usageBefore = bean.getHeapMemoryUsage().getUsed();
    
    long size = 0;
    long ts=0;
    
    for (int newValue = 0; newValue < 1000; newValue++) {
      for (int row = newValue; row < newValue + 1000; row++) {
        byte[] rowBytes = Bytes.toBytes(row);
        size += memstore.updateColumnValue(rowBytes, FAMILY, qualifier, newValue, ++ts);
      }
    }
    System.out.println("Wrote " + ts + " vals");
    for (int i = 0; i < 3; i++) { System.gc(); }
    long usageAfter = bean.getHeapMemoryUsage().getUsed();
    System.out.println("Memory used: " + (usageAfter - usageBefore)
        + " (heapsize: " + memstore.heapSize() + 
        " size: " + size + ")");
  }

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    memstore = new MemStore(conf, KeyValue.COMPARATOR);


    int ROW_SIZE = 2048;
    byte[] qualifier = new byte[ROW_SIZE - 4];


    MemoryMXBean bean = ManagementFactory.getMemoryMXBean();
    for (int i = 0; i < 3; i++) { System.gc(); }
    long usageBefore = bean.getHeapMemoryUsage().getUsed();


    long size = 0;
    long ts=0;


    for (int newValue = 0; newValue < 1000; newValue++) {
      for (int row = newValue; row < newValue + 1000; row++) {
        byte[] rowBytes = Bytes.toBytes(row);
        size += memstore.updateColumnValue(rowBytes, FAMILY, qualifier, newValue, ++ts);
      }
    }
    System.out.println("Wrote " + ts + " vals");
    for (int i = 0; i < 3; i++) { System.gc(); }
    long usageAfter = bean.getHeapMemoryUsage().getUsed();
    System.out.println("Memory used: " + (usageAfter - usageBefore)
        + " (heapsize: " + memstore.heapSize() +
        " size: " + size + ")");
  }

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        int maxNameLen;


        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        ThreadMXBean threads = ManagementFactory.getThreadMXBean();
        MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
        ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();


        //
        // print Karaf informations
        //
        maxNameLen = 25;
        System.out.println("Karaf");
        printValue("Karaf version", maxNameLen, System.getProperty("karaf.version"));
        printValue("Karaf home", maxNameLen, System.getProperty("karaf.home"));
        printValue("Karaf base", maxNameLen, System.getProperty("karaf.base"));
        printValue("OSGi Framework", maxNameLen, bundleContext.getBundle(0).getSymbolicName() + " - " +
                bundleContext.getBundle(0).getVersion());
        System.out.println();


        System.out.println("JVM");
        printValue("Java Virtual Machine", maxNameLen, runtime.getVmName() + " version " + runtime.getVmVersion());
        printValue("Version", maxNameLen, System.getProperty("java.version"));
        printValue("Vendor", maxNameLen, runtime.getVmVendor());
        printValue("Uptime", maxNameLen, printDuration(runtime.getUptime()));
        try {
            printValue("Process CPU time", maxNameLen, printDuration(getSunOsValueAsLong(os, "getProcessCpuTime") / 1000000));
        } catch (Throwable t) {
        }
        printValue("Total compile time", maxNameLen, printDuration(ManagementFactory.getCompilationMXBean().getTotalCompilationTime()));


        System.out.println("Threads");
        printValue("Live threads", maxNameLen, Integer.toString(threads.getThreadCount()));
        printValue("Daemon threads", maxNameLen, Integer.toString(threads.getDaemonThreadCount()));
        printValue("Peak", maxNameLen, Integer.toString(threads.getPeakThreadCount()));
        printValue("Total started", maxNameLen, Long.toString(threads.getTotalStartedThreadCount()));


        System.out.println("Memory");
        printValue("Current heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getUsed()));
        printValue("Maximum heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getMax()));
        printValue("Committed heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getCommitted()));
        printValue("Pending objects", maxNameLen, Integer.toString(mem.getObjectPendingFinalizationCount()));
        for (GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) {
            String val = "Name = '" + gc.getName() + "', Collections = " + gc.getCollectionCount() + ", Time = " + printDuration(gc.getCollectionTime());
            printValue("Garbage collector", maxNameLen, val);
        }

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        doEventCountUpdates();
        metrics.update();
    }
    
    private void doMemoryUpdates() {
        MemoryMXBean memoryMXBean =
               ManagementFactory.getMemoryMXBean();
        MemoryUsage memNonHeap =
                memoryMXBean.getNonHeapMemoryUsage();
        MemoryUsage memHeap =
                memoryMXBean.getHeapMemoryUsage();
        metrics.setMetric("memNonHeapUsedM", memNonHeap.getUsed()/M);
        metrics.setMetric("memNonHeapCommittedM", memNonHeap.getCommitted()/M);
        metrics.setMetric("memHeapUsedM", memHeap.getUsed()/M);
        metrics.setMetric("memHeapCommittedM", memHeap.getCommitted()/M);
    }

View Full Code Here

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