Example usage for java.lang.management MemoryPoolMXBean getPeakUsage

Introduction

In this page you can find the example usage for java.lang.management MemoryPoolMXBean getPeakUsage.

Prototype

public MemoryUsage getPeakUsage();

Source Link

Document

Returns the peak memory usage of this memory pool since the Java virtual machine was started or since the peak was reset.

Usage

From source file:MainClass.java

public static void premain(final Instrumentation inst) {
    Runtime.getRuntime().addShutdownHook(new Thread() {
        public void run() {
            try {
                PrintWriter out = new PrintWriter(System.err);

                ThreadMXBean tb = ManagementFactory.getThreadMXBean();
                out.printf("Current thread count: %d%n", tb.getThreadCount());
                out.printf("Peak thread count: %d%n", tb.getPeakThreadCount());

                List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
                for (MemoryPoolMXBean pool : pools) {
                    MemoryUsage peak = pool.getPeakUsage();
                    out.printf("Peak %s memory used: %,d%n", pool.getName(), peak.getUsed());
                    out.printf("Peak %s memory reserved: %,d%n", pool.getName(), peak.getCommitted());
                }//from w ww  .j a va 2 s . c o  m

                Class[] loaded = inst.getAllLoadedClasses();
                out.println("Loaded classes:");
                for (Class c : loaded)
                    out.println(c.getName());
                out.close();
            } catch (Throwable t) {
                System.err.println("Exception in agent: " + t);
            }
        }
    });
}

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From source file:com.datumbox.common.utilities.ProcessStatistics.java

public long peakMemoryBytes() {
    long maxBytes = Long.MIN_VALUE;

    List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean pool : pools) {
        MemoryUsage peak = pool.getPeakUsage();

        long peakUsed = peak.getUsed();
        if (maxBytes < peakUsed) {
            maxBytes = peakUsed;/*from   w ww . j av a 2 s.c o  m*/
        }
    }

    return maxBytes;
}

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From source file:org.carrot2.core.benchmarks.memtime.MemTimeBenchmark.java

/**
 * Return the peak number of bytes used (all memory pools) and reset the peak usage.
 */// ww w . j a va 2s.  c o m
private static long memPeak() {
    long peak = 0;
    for (MemoryPoolMXBean b : ManagementFactory.getMemoryPoolMXBeans()) {
        peak += b.getPeakUsage().getUsed();
        b.resetPeakUsage();
    }

    return peak;
}

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From source file:org.mifos.framework.ApplicationInitializer.java

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("+++++++++++++++++++");
    }/* ww  w .jav  a 2  s  . com*/
}

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