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

Example 31 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project opennms by OpenNMS.

the class JavaReportPlugin method getEntries.

@Override
public Map<String, Resource> getEntries() {
    final TreeMap<String, Resource> map = new TreeMap<String, Resource>();
    map.put("Class Version", getResourceFromProperty("java.class.version"));
    map.put("Compiler", getResourceFromProperty("java.compiler"));
    map.put("Home", getResourceFromProperty("java.home"));
    map.put("Version", getResourceFromProperty("java.version"));
    map.put("Vendor", getResourceFromProperty("java.vendor"));
    map.put("VM Version", getResourceFromProperty("java.vm.version"));
    map.put("VM Name", getResourceFromProperty("java.vm.name"));
    MemoryMXBean memoryBean = getBean(ManagementFactory.MEMORY_MXBEAN_NAME, MemoryMXBean.class);
    if (memoryBean == null) {
        LOG.info("falling back to local VM MemoryMXBean");
        memoryBean = ManagementFactory.getMemoryMXBean();
    }
    addGetters(memoryBean, map);
    RuntimeMXBean runtimeBean = getBean(ManagementFactory.RUNTIME_MXBEAN_NAME, RuntimeMXBean.class);
    if (runtimeBean == null) {
        LOG.info("falling back to local VM RuntimeMXBean");
        runtimeBean = ManagementFactory.getRuntimeMXBean();
    }
    addGetters(runtimeBean, map);
    ClassLoadingMXBean classBean = getBean(ManagementFactory.CLASS_LOADING_MXBEAN_NAME, ClassLoadingMXBean.class);
    if (classBean == null) {
        LOG.info("falling back to local VM ClassLoadingMXBean");
        classBean = ManagementFactory.getClassLoadingMXBean();
    }
    addGetters(classBean, map);
    return map;
}

Example 32 with MemoryMXBean

use of java.lang.management.MemoryMXBean 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 33 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project gerrit by GerritCodeReview.

the class ProcMetricModule method procJvmMemory.

private void procJvmMemory(MetricMaker metrics) {
    CallbackMetric0<Long> heapCommitted = metrics.newCallbackMetric("proc/jvm/memory/heap_committed", Long.class, new Description("Amount of memory guaranteed for user objects.").setGauge().setUnit(Units.BYTES));
    CallbackMetric0<Long> heapUsed = metrics.newCallbackMetric("proc/jvm/memory/heap_used", Long.class, new Description("Amount of memory holding user objects.").setGauge().setUnit(Units.BYTES));
    CallbackMetric0<Long> nonHeapCommitted = metrics.newCallbackMetric("proc/jvm/memory/non_heap_committed", Long.class, new Description("Amount of memory guaranteed for classes, etc.").setGauge().setUnit(Units.BYTES));
    CallbackMetric0<Long> nonHeapUsed = metrics.newCallbackMetric("proc/jvm/memory/non_heap_used", Long.class, new Description("Amount of memory holding classes, etc.").setGauge().setUnit(Units.BYTES));
    CallbackMetric0<Integer> objectPendingFinalizationCount = metrics.newCallbackMetric("proc/jvm/memory/object_pending_finalization_count", Integer.class, new Description("Approximate number of objects needing finalization.").setGauge().setUnit("objects"));
    MemoryMXBean memory = ManagementFactory.getMemoryMXBean();
    metrics.newTrigger(ImmutableSet.<CallbackMetric<?>>of(heapCommitted, heapUsed, nonHeapCommitted, nonHeapUsed, objectPendingFinalizationCount), () -> {
        try {
            MemoryUsage stats = memory.getHeapMemoryUsage();
            heapCommitted.set(stats.getCommitted());
            heapUsed.set(stats.getUsed());
        } catch (IllegalArgumentException e) {
        // MXBean may throw due to a bug in Java 7; ignore.
        }
        MemoryUsage stats = memory.getNonHeapMemoryUsage();
        nonHeapCommitted.set(stats.getCommitted());
        nonHeapUsed.set(stats.getUsed());
        objectPendingFinalizationCount.set(memory.getObjectPendingFinalizationCount());
    });
}

Example 34 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project karaf by apache.

the class EnvironmentDumpProvider method dumpMemoryInformation.

private void dumpMemoryInformation(final PrintWriter outPW) {
    final MemoryMXBean mxBean = ManagementFactory.getMemoryMXBean();
    if (null == mxBean) {
        return;
    }
    final MemoryUsage heapMemoryUsage = mxBean.getHeapMemoryUsage();
    final MemoryUsage nonHeapMemoryUsage = mxBean.getNonHeapMemoryUsage();
    if (heapMemoryUsage != null) {
        outPW.println("HEAP Memory:");
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "commited", printMemory(heapMemoryUsage.getCommitted())).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "init", printMemory(heapMemoryUsage.getInit())).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "used", printMemory(heapMemoryUsage.getUsed())).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "maximal", printMemory(heapMemoryUsage.getMax())).println();
    }
    if (nonHeapMemoryUsage != null) {
        outPW.println("NON-HEAP Memory:");
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "commited", printMemory(nonHeapMemoryUsage.getCommitted())).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "init", printMemory(nonHeapMemoryUsage.getInit())).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "used", printMemory(nonHeapMemoryUsage.getUsed())).println();
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "maximal", printMemory(nonHeapMemoryUsage.getMax())).println();
    }
}

Example 35 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project karaf by apache.

the class MemoryDumpProvider method writeDump.

@Override
protected void writeDump(OutputStreamWriter outputStream) throws Exception {
    MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
    outputStream.write("Number of objects waiting finalization: " + memoryMXBean.getObjectPendingFinalizationCount() + "\n\n");
    outputStream.write("Heap:\n");
    outputStream.write("\tInit:      " + memoryMXBean.getHeapMemoryUsage().getInit() + "\n");
    outputStream.write("\tUser:      " + memoryMXBean.getHeapMemoryUsage().getUsed() + "\n");
    outputStream.write("\tCommitted: " + memoryMXBean.getHeapMemoryUsage().getCommitted() + "\n");
    outputStream.write("\tMax:       " + memoryMXBean.getHeapMemoryUsage().getMax() + "\n");
    outputStream.write("Non-Heap: \n");
    outputStream.write("\tInit:      " + memoryMXBean.getNonHeapMemoryUsage().getInit() + "\n");
    outputStream.write("\tUser:      " + memoryMXBean.getNonHeapMemoryUsage().getUsed() + "\n");
    outputStream.write("\tCommitted: " + memoryMXBean.getNonHeapMemoryUsage().getCommitted() + "\n");
    outputStream.write("\tMax:       " + memoryMXBean.getNonHeapMemoryUsage().getMax() + "\n");
}