Java Code Examples for java.lang.management.MemoryPoolMXBean#isUsageThresholdSupported()

The following examples show how to use java.lang.management.MemoryPoolMXBean#isUsageThresholdSupported() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may want to check out the right sidebar which shows the related API usage.
Example 1
Source Project: dremio-oss   File: HeapMonitorThread.java    License: Apache License 2.0 6 votes vote down vote up
private void registerForNotifications() {
  // Register the listener with MemoryMXBean
  NotificationEmitter emitter = (NotificationEmitter) ManagementFactory.getMemoryMXBean();
  emitter.addNotificationListener(listener, null, null);

  // set collection usage threshold.
  for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
    if (pool.getType() == MemoryType.HEAP &&
      pool.isUsageThresholdSupported() &&
      pool.isCollectionUsageThresholdSupported()) {

      long threshold = (pool.getUsage().getMax() * thresholdPercentage) / 100;
      logger.info("setting collection threshold for " + pool.getName() +
        " with max " + pool.getUsage().getMax() +
        " to " + threshold);

      pool.setCollectionUsageThreshold(threshold);
      monitoredPools.put(pool.getName(), pool.getCollectionUsageThresholdCount());
    } else {
      logger.info("skip monitoring for pool " + pool.getName());
    }
  }
}
 
Example 2
Source Project: pitest   File: MemoryWatchdog.java    License: Apache License 2.0 6 votes vote down vote up
public static void addWatchDogToAllPools(final long threshold,
    final NotificationListener listener) {
  final MemoryMXBean memBean = ManagementFactory.getMemoryMXBean();
  final NotificationEmitter ne = (NotificationEmitter) memBean;

  ne.addNotificationListener(listener, null, null);

  final List<MemoryPoolMXBean> memPools = ManagementFactory
      .getMemoryPoolMXBeans();
  for (final MemoryPoolMXBean mp : memPools) {
    if (mp.isUsageThresholdSupported()) {
      final MemoryUsage mu = mp.getUsage();
      final long max = mu.getMax();
      final long alert = (max * threshold) / 100;
      // LOG.info("Setting a threshold shutdown on pool: " + mp.getName()
      // + " for: " + alert);
      mp.setUsageThreshold(alert);

    }
  }
}
 
Example 3
Source Project: consulo   File: PerformanceWatcher.java    License: Apache License 2.0 6 votes vote down vote up
private void watchCodeCache(final MemoryPoolMXBean bean) {
  final long threshold = bean.getUsage().getMax() - 5 * 1024 * 1024;
  if (!bean.isUsageThresholdSupported() || threshold <= 0) return;

  bean.setUsageThreshold(threshold);
  final NotificationEmitter emitter = (NotificationEmitter)ManagementFactory.getMemoryMXBean();
  emitter.addNotificationListener(new NotificationListener() {
    @Override
    public void handleNotification(Notification n, Object hb) {
      if (bean.getUsage().getUsed() > threshold) {
        LOG.info("Code Cache is almost full");
        dumpThreads("codeCacheFull", true);
        try {
          emitter.removeNotificationListener(this);
        }
        catch (ListenerNotFoundException e) {
          LOG.error(e);
        }
      }
    }
  }, null, null);
}
 
Example 4
public static void setPercentageUsageThreshold(double percentage) {
    for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
        if (pool.getType() == MemoryType.HEAP && pool.isUsageThresholdSupported()) {
            if (percentage <= 0.0 || percentage > 1.0) {
                throw new IllegalArgumentException("percentage not in range");
            }
            long warningThreshold = (long) (pool.getUsage().getMax() * percentage);
            pool.setUsageThreshold(warningThreshold);
        }
    }
}
 
Example 5
private static MemoryPoolMXBean findTenuredGenPool() {
    for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
        if (pool.getType() == MemoryType.HEAP && pool.isUsageThresholdSupported()) {
            return pool;
        }
    }
    throw new AssertionError("could not find tenured space");
}
 
Example 6
/**
 * Tenured Space Pool can be determined by it being of type HEAP and by it
 * being possible to set the usage threshold.
 */
private static MemoryPoolMXBean findTenuredGenPool() {
	for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
		// I don't know whether this approach is better, or whether
		// we should rather check for the pool name "Tenured Gen"?
		if (pool.getType() == MemoryType.HEAP
				&& pool.isUsageThresholdSupported()) {
			return pool;
		}
	}
	throw new AssertionError("Could not find tenured space");
}
 
Example 7
/**
 * Tenured Space Pool can be determined by it being of type HEAP and by it
 * being possible to set the usage threshold.
 *
 * @return MXBean for the Tenured Space Pool
 */
private static MemoryPoolMXBean findTenuredGenPool() {
    // I don't know whether this approach is better, or whether
    // we should rather check for the pool name "Tenured Gen"?
    for (final MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans())
        if (pool.getType() == MemoryType.HEAP && pool.isUsageThresholdSupported()) {
            return pool;
        }
    throw new AssertionError("Could not find tenured space");
}
 
Example 8
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 9
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 10
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 11
Source Project: openjdk-systemtest   File: VMLogger.java    License: Apache License 2.0 4 votes vote down vote up
public void enableOptionalFunctionality()  {
    try {
        // ClassLoadingMXBean operations
        classBean.setVerbose(true);

        // MemoryMXBean operations
        memBean.setVerbose(true);

        // MemoryPoolMXBean operations
        for (MemoryPoolMXBean memPoolBean: memPoolBeans) {
            memPoolBean.resetPeakUsage();

            if (memPoolBean.isCollectionUsageThresholdSupported()) {
                memPoolBean.setCollectionUsageThreshold(10000);
            }

            if (memPoolBean.isUsageThresholdSupported()) {
                memPoolBean.setUsageThreshold(200000);
            }            
        }

        // ThreadMXBean operations
        threadBean.resetPeakThreadCount();

        if (threadBean.isThreadContentionMonitoringSupported()) {
            threadBean.setThreadContentionMonitoringEnabled(true);
        }

        if (threadBean.isThreadCpuTimeSupported()) {
            threadBean.setThreadCpuTimeEnabled(true);
        }
        
        // LoggingMXBean operations
        List<String> loggers = logBean.getLoggerNames();
        
        String[] levels = {"SEVERE", "WARNING", "INFO", "CONFIG", "FINE", "FINER", "FINEST"};
        int i = 0;
        
        for( String logger : loggers) {               	
            if (i > 6) {
            	i = i - 7;
            }
            
            // There's a chance the logger no longer exists
            String parent = logBean.getParentLoggerName(logger);
            if (parent != null) {
            	logBean.setLoggerLevel(logger, levels[i]);
            }
            
            i++;                
        }
        
    } catch (UnsupportedOperationException uoe) {
        Message.logOut("One of the operations you tried is not supported");
        uoe.printStackTrace();
    }
}
 
Example 12
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 13
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 14
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 15
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- MemoryPoolMXBean") ;

    try {
        ObjectName filterName =
                new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
                + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);

        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName memoryPoolName = iter.next() ;
            System.out.println("-------- " + memoryPoolName) ;
            MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            MemoryPoolMXBean memoryPool = null;

            memoryPool =
                    JMX.newMXBeanProxy(mbsc,
                    memoryPoolName,
                    MemoryPoolMXBean.class,
                    true) ;
            System.out.println("getCollectionUsage\t\t"
                    + memoryPool.getCollectionUsage());
            System.out.println("getMemoryManagerNames\t\t"
                    + Arrays.deepToString(memoryPool.getMemoryManagerNames()));
            System.out.println("getName\t\t"
                    + memoryPool.getName());
            System.out.println("getPeakUsage\t\t"
                    + memoryPool.getPeakUsage());
            System.out.println("getType\t\t"
                    + memoryPool.getType());
            System.out.println("getUsage\t\t"
                    + memoryPool.getUsage());
            System.out.println("isValid\t\t"
                    + memoryPool.isValid());
            boolean supported = memoryPool.isUsageThresholdSupported() ;
            System.out.println("isUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getUsageThreshold\t\t"
                        + memoryPool.getUsageThreshold());
                System.out.println("isUsageThresholdExceeded\t\t"
                        + memoryPool.isUsageThresholdExceeded());
                System.out.println("getUsageThresholdCount\t\t"
                        + memoryPool.getUsageThresholdCount());
            }

            supported = memoryPool.isCollectionUsageThresholdSupported() ;
            System.out.println("isCollectionUsageThresholdSupported\t\t"
                    + supported);

            if ( supported ) {
                System.out.println("getCollectionUsageThreshold\t\t"
                        + memoryPool.getCollectionUsageThreshold());
                System.out.println("getCollectionUsageThresholdCount\t\t"
                        + memoryPool.getCollectionUsageThresholdCount());
                System.out.println("isCollectionUsageThresholdExceeded\t\t"
                        + memoryPool.isCollectionUsageThresholdExceeded());
            }

            memoryPool.resetPeakUsage();
        }

        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 
Example 16
private void setupMemoryListener() {
    if (Settings.IMP.MAX_MEMORY_PERCENT < 1 || Settings.IMP.MAX_MEMORY_PERCENT > 99) {
        return;
    }
    try {
        final MemoryMXBean memBean = ManagementFactory.getMemoryMXBean();
        final NotificationEmitter ne = (NotificationEmitter) memBean;

        ne.addNotificationListener(new NotificationListener() {
            @Override
            public void handleNotification(final Notification notification, final Object handback) {
                final long heapSize = Runtime.getRuntime().totalMemory();
                final long heapMaxSize = Runtime.getRuntime().maxMemory();
                if (heapSize < heapMaxSize) {
                    return;
                }
                MemUtil.memoryLimitedTask();
            }
        }, null, null);

        final List<MemoryPoolMXBean> memPools = ManagementFactory.getMemoryPoolMXBeans();
        for (final MemoryPoolMXBean mp : memPools) {
            if (mp.isUsageThresholdSupported()) {
                final MemoryUsage mu = mp.getUsage();
                final long max = mu.getMax();
                if (max < 0) {
                    continue;
                }
                final long alert = (max * Settings.IMP.MAX_MEMORY_PERCENT) / 100;
                mp.setUsageThreshold(alert);
            }
        }
    } catch (Throwable e) {
        debug("====== MEMORY LISTENER ERROR ======");
        MainUtil.handleError(e, false);
        debug("===================================");
        debug("FAWE needs access to the JVM memory system:");
        debug(" - Change your Java security settings");
        debug(" - Disable this with `max-memory-percent: -1`");
        debug("===================================");
    }
}
 
Example 17
Source Project: spork   File: SpillableMemoryManager.java    License: Apache License 2.0 4 votes vote down vote up
private SpillableMemoryManager() {
    ((NotificationEmitter)ManagementFactory.getMemoryMXBean()).addNotificationListener(this, null, null);
    List<MemoryPoolMXBean> mpbeans = ManagementFactory.getMemoryPoolMXBeans();
    MemoryPoolMXBean tenuredHeap = null;
    long tenuredHeapSize = 0;
    long totalSize = 0;
    for (MemoryPoolMXBean pool : mpbeans) {
        log.debug("Found heap (" + pool.getName() + ") of type " + pool.getType());
        if (pool.getType() == MemoryType.HEAP) {
            long size = pool.getUsage().getMax();
            totalSize += size;
            // CMS Old Gen or "tenured" is the only heap that supports
            // setting usage threshold.
            if (pool.isUsageThresholdSupported()) {
                tenuredHeapSize = size;
                tenuredHeap = pool;
            }
        }
    }
    extraGCSpillSizeThreshold  = (long) (totalSize * extraGCThresholdFraction);
    if (tenuredHeap == null) {
        throw new RuntimeException("Couldn't find heap");
    }
    log.debug("Selected heap to monitor (" +
        tenuredHeap.getName() + ")");

    // we want to set both collection and usage threshold alerts to be
    // safe. In some local tests after a point only collection threshold
    // notifications were being sent though usage threshold notifications
    // were sent early on. So using both would ensure that
    // 1) we get notified early (though usage threshold exceeded notifications)
    // 2) we get notified always when threshold is exceeded (either usage or
    //    collection)

    /* We set the threshold to be 50% of tenured since that is where
     * the GC starts to dominate CPU time according to Sun doc */
    tenuredHeap.setCollectionUsageThreshold((long)(tenuredHeapSize * collectionMemoryThresholdFraction));
    // we set a higher threshold for usage threshold exceeded notification
    // since this is more likely to be effective sooner and we do not
    // want to be spilling too soon
    tenuredHeap.setUsageThreshold((long)(tenuredHeapSize * memoryThresholdFraction));
}