Examples with MemoryPoolMXBean java.lang.management.MemoryPoolMXBean used on opensource projects

Example 61 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project head by mifos.

the class ApplicationInitializer method printMemoryPool.

private void printMemoryPool() {
    logger.info("Memory MXBean");
    logger.info("Heap Memory Usage: " + ManagementFactory.getMemoryMXBean().getHeapMemoryUsage());
    logger.info("Non-Heap Memory Usage: " + ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage());
    logger.info("-----Memory Pool MXBeans------");
    Iterator<MemoryPoolMXBean> iter = ManagementFactory.getMemoryPoolMXBeans().iterator();
    while (iter.hasNext()) {
        MemoryPoolMXBean item = iter.next();
        logger.info("Name: " + item.getName());
        logger.info("Type: " + item.getType());
        logger.info("Usage: " + item.getUsage());
        logger.info("Peak Usage: " + item.getPeakUsage());
        logger.info("Collection Usage: " + item.getCollectionUsage());
        logger.info("+++++++++++++++++++");
    }
}

Example 62 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project geode by apache.

the class VMStats50 method refreshMemoryPools.

private void refreshMemoryPools() {
    boolean reInitPools = false;
    Iterator<Map.Entry<MemoryPoolMXBean, Statistics>> it = mpMap.entrySet().iterator();
    while (it.hasNext()) {
        Map.Entry<MemoryPoolMXBean, Statistics> me = it.next();
        MemoryPoolMXBean mp = me.getKey();
        Statistics s = me.getValue();
        if (!mp.isValid()) {
            s.close();
            it.remove();
            reInitPools = true;
        } else {
            MemoryUsage mu = null;
            try {
                mu = mp.getUsage();
            } catch (IllegalArgumentException ex) {
                // to workaround JRockit bug 36348 just ignore this and try the next pool
                continue;
            } catch (InternalError ie) {
                // Somebody saw an InternalError once but I have no idea how to reproduce it. Was this a
                // race between
                // mp.isValid() and mp.getUsage()? Perhaps.
                s.close();
                it.remove();
                reInitPools = true;
                logger.warn("Accessing MemoryPool '{}' threw an Internal Error: {}", mp.getName(), ie.getMessage());
                continue;
            }
            s.setLong(mp_l_initMemoryId, mu.getInit());
            s.setLong(mp_l_usedMemoryId, mu.getUsed());
            s.setLong(mp_l_committedMemoryId, mu.getCommitted());
            s.setLong(mp_l_maxMemoryId, mu.getMax());
            if (mp.isUsageThresholdSupported()) {
                s.setLong(mp_usageThresholdId, mp.getUsageThreshold());
                s.setLong(mp_usageExceededId, mp.getUsageThresholdCount());
            }
            mu = null;
            if (!this.isCollectionUsageUnsupported(mp)) {
                try {
                    mu = mp.getCollectionUsage();
                } catch (UnsupportedOperationException ex) {
                    // JRockit throws this exception instead of returning null
                    // as the javadocs say it should. See bug 36348
                    this.setCollectionUsageUnsupported(mp);
                } catch (IllegalArgumentException ex) {
                    // Yet another JRockit bug in which its code catches an assertion
                    // about the state of their bean stat values being inconsistent.
                    // See bug 36348.
                    this.setCollectionUsageUnsupported(mp);
                }
            }
            if (mu != null) {
                // s.setLong(mp_gc_initMemoryId, mu.getInit());
                s.setLong(mp_gc_usedMemoryId, mu.getUsed());
                // s.setLong(mp_gc_maxMemoryId, mu.getMax());
                if (mp.isCollectionUsageThresholdSupported()) {
                    s.setLong(mp_collectionUsageThresholdId, mp.getCollectionUsageThreshold());
                    s.setLong(mp_collectionUsageExceededId, mp.getCollectionUsageThresholdCount());
                }
            }
        }
    }
    if (reInitPools) {
        initMemoryPools();
    }
}

Example 63 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project geode by apache.

the class MXMemoryPoolListenerExample method main.

public static void main(String[] args) {
    final MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
    final double threshold;
    {
        double t = 0.8;
        if (args.length > 0) {
            try {
                t = Integer.parseInt(args[0]) / 100;
            } catch (NumberFormatException useDefault) {
            }
        }
        if (t < 0.0 || t > 1.0) {
            throw new IllegalArgumentException("Theshold must be >= 0 and <= 100");
        }
        threshold = t;
    }
    final int percentTenured;
    {
        int p = 100;
        if (args.length > 1) {
            try {
                p = Integer.parseInt(args[1]);
            } catch (NumberFormatException useDefault) {
            }
        }
        if (p > 100 || p < 0) {
            throw new IllegalArgumentException("Percent Tenured must be >= 0 and <= 100");
        }
        percentTenured = p;
    }
    Properties dsProps = new Properties();
    // Loner
    dsProps.setProperty(MCAST_PORT, "0");
    dsProps.setProperty(ConfigurationProperties.LOG_LEVEL, "info");
    dsProps.setProperty(ConfigurationProperties.STATISTIC_SAMPLE_RATE, "200");
    dsProps.setProperty(ConfigurationProperties.ENABLE_TIME_STATISTICS, "true");
    dsProps.setProperty(ConfigurationProperties.STATISTIC_SAMPLING_ENABLED, "true");
    DistributedSystem ds = DistributedSystem.connect(dsProps);
    final LogWriter logger = ds.getLogWriter();
    logger.info("Usage threshold: " + threshold + "; percent tenured: " + percentTenured + "; Runtime Maximum memory: " + (Runtime.getRuntime().maxMemory() / (1024 * 1024)) + "Mb" + "; Heap Maximum memory: " + (mbean.getHeapMemoryUsage().getMax() / (1024 * 1024)) + "Mb");
    MXMemoryPoolListenerExample me = new MXMemoryPoolListenerExample(ds);
    // Register this listener to NotificationEmitter
    NotificationEmitter emitter = (NotificationEmitter) mbean;
    emitter.addNotificationListener(me, null, null);
    List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean p : pools) {
        if (p.isCollectionUsageThresholdSupported()) {
            // p.setCollectionUsageThreshold(0);
            logger.info("Pool which supports collection usage threshold: " + p.getName() + "; " + p.getCollectionUsage());
        }
        // On JRockit do not set the usage threshold on the Nursery pool
        if (p.getType().equals(MemoryType.HEAP) && p.isUsageThresholdSupported() && !p.getName().startsWith("Nursery")) {
            int byteThreshold = (int) Math.ceil(threshold * p.getUsage().getMax());
            logger.info("Setting threshold " + (byteThreshold / (1024 * 1024)) + "Mb on: " + p.getName() + "; " + p.getCollectionUsage());
            p.setUsageThreshold(byteThreshold);
        }
    }
    final Cache c = CacheFactory.create(ds);
    new MemoryHog("hog_1", c, me.critical).consumeMemory(percentTenured).printTenuredSize();
    ds.disconnect();
}

Example 64 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project jackrabbit-oak by apache.

the class GCMemoryBarrier method getMemoryPool.

private static MemoryPoolMXBean getMemoryPool() {
    long maxSize = 0;
    MemoryPoolMXBean maxPool = null;
    for (MemoryPoolMXBean pool : getMemoryPoolMXBeans()) {
        if (HEAP == pool.getType() && pool.isCollectionUsageThresholdSupported()) {
            // Get usage after a GC, which is more stable, if available
            long poolSize = pool.getCollectionUsage().getMax();
            // Keep the pool with biggest size, by default it should be Old Gen Space
            if (poolSize > maxSize) {
                maxPool = pool;
            }
        }
    }
    return maxPool;
}

Example 65 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project jdk8u_jdk by JetBrains.

the class GarbageCollectorImpl method getAllPoolNames.

synchronized String[] getAllPoolNames() {
    if (poolNames == null) {
        List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
        poolNames = new String[pools.size()];
        int i = 0;
        for (MemoryPoolMXBean m : pools) {
            poolNames[i++] = m.getName();
        }
    }
    return poolNames;
}