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

Example 16 with MemoryPoolMXBean

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

the class MonitorMemory method onConfigured.

@OnScheduled
public void onConfigured(final ConfigurationContext config) throws InitializationException {
    final String desiredMemoryPoolName = config.getProperty(MEMORY_POOL_PROPERTY).getValue();
    final String thresholdValue = config.getProperty(THRESHOLD_PROPERTY).getValue().trim();
    threshold = thresholdValue;
    final Long reportingIntervalValue = config.getProperty(REPORTING_INTERVAL).asTimePeriod(TimeUnit.MILLISECONDS);
    if (reportingIntervalValue == null) {
        reportingIntervalMillis = config.getSchedulingPeriod(TimeUnit.MILLISECONDS);
    } else {
        reportingIntervalMillis = reportingIntervalValue;
    }
    final List<MemoryPoolMXBean> memoryPoolBeans = ManagementFactory.getMemoryPoolMXBeans();
    for (int i = 0; i < memoryPoolBeans.size() && monitoredBean == null; i++) {
        MemoryPoolMXBean memoryPoolBean = memoryPoolBeans.get(i);
        String memoryPoolName = memoryPoolBean.getName();
        if (desiredMemoryPoolName.equals(memoryPoolName)) {
            monitoredBean = memoryPoolBean;
            if (memoryPoolBean.isCollectionUsageThresholdSupported()) {
                long calculatedThreshold;
                if (DATA_SIZE_PATTERN.matcher(thresholdValue).matches()) {
                    calculatedThreshold = DataUnit.parseDataSize(thresholdValue, DataUnit.B).longValue();
                } else {
                    final String percentage = thresholdValue.substring(0, thresholdValue.length() - 1);
                    final double pct = Double.parseDouble(percentage) / 100D;
                    calculatedThreshold = (long) (monitoredBean.getUsage().getMax() * pct);
                }
                monitoredBean.setUsageThreshold(calculatedThreshold);
            }
        }
    }
    if (monitoredBean == null) {
        throw new InitializationException("Found no JVM Memory Pool with name " + desiredMemoryPoolName + "; will not monitor Memory Pool");
    }
}

Example 17 with MemoryPoolMXBean

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

the class MonitorMemory method onTrigger.

@Override
public void onTrigger(final ReportingContext context) {
    final MemoryPoolMXBean bean = monitoredBean;
    if (bean == null) {
        return;
    }
    final MemoryUsage usage = bean.getUsage();
    if (usage == null) {
        getLogger().warn("{} could not determine memory usage for pool with name {}", new Object[] { this, context.getProperty(MEMORY_POOL_PROPERTY) });
        return;
    }
    final double percentageUsed = (double) usage.getUsed() / (double) usage.getMax() * 100D;
    if (bean.isUsageThresholdExceeded()) {
        if (System.currentTimeMillis() < reportingIntervalMillis + lastReportTime && lastReportTime > 0L) {
            return;
        }
        lastReportTime = System.currentTimeMillis();
        lastValueWasExceeded = true;
        final String message = String.format("Memory Pool '%1$s' has exceeded the configured Threshold of %2$s, having used %3$s / %4$s (%5$.2f%%)", bean.getName(), threshold, FormatUtils.formatDataSize(usage.getUsed()), FormatUtils.formatDataSize(usage.getMax()), percentageUsed);
        getLogger().warn("{}", new Object[] { message });
    } else if (lastValueWasExceeded) {
        lastValueWasExceeded = false;
        lastReportTime = System.currentTimeMillis();
        final String message = String.format("Memory Pool '%1$s' is no longer exceeding the configured Threshold of %2$s; currently using %3$s / %4$s (%5$.2f%%)", bean.getName(), threshold, FormatUtils.formatDataSize(usage.getUsed()), FormatUtils.formatDataSize(usage.getMax()), percentageUsed);
        getLogger().info("{}", new Object[] { message });
    }
}

Example 18 with MemoryPoolMXBean

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

the class JVM_MANAGEMENT_MIB_IMPL method findInCache.

/**
     * WARNING: This should probably be moved to JvmMemPoolTableMetaImpl
     **/
private int findInCache(SnmpTableHandler handler, String poolName) {
    if (!(handler instanceof SnmpCachedData)) {
        if (handler != null) {
            final String err = "Bad class for JvmMemPoolTable datas: " + handler.getClass().getName();
            log.error("getJvmMemPoolEntry", err);
        }
        return -1;
    }
    final SnmpCachedData data = (SnmpCachedData) handler;
    final int len = data.datas.length;
    for (int i = 0; i < data.datas.length; i++) {
        final MemoryPoolMXBean pool = (MemoryPoolMXBean) data.datas[i];
        if (poolName.equals(pool.getName()))
            return i;
    }
    return -1;
}

Example 19 with MemoryPoolMXBean

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

the class LastGCInfo method checkGcInfo.

private static void checkGcInfo(String name, GcInfo info) throws Exception {
    System.out.println("GC statistic for : " + name);
    System.out.print("GC #" + info.getId());
    System.out.print(" start:" + info.getStartTime());
    System.out.print(" end:" + info.getEndTime());
    System.out.println(" (" + info.getDuration() + "ms)");
    Map usage = info.getMemoryUsageBeforeGc();
    List pnames = new ArrayList();
    for (Iterator iter = usage.entrySet().iterator(); iter.hasNext(); ) {
        Map.Entry entry = (Map.Entry) iter.next();
        String poolname = (String) entry.getKey();
        pnames.add(poolname);
        MemoryUsage busage = (MemoryUsage) entry.getValue();
        MemoryUsage ausage = (MemoryUsage) info.getMemoryUsageAfterGc().get(poolname);
        if (ausage == null) {
            throw new RuntimeException("After Gc Memory does not exist" + " for " + poolname);
        }
        System.out.println("Usage for pool " + poolname);
        System.out.println("   Before GC: " + busage);
        System.out.println("   After GC: " + ausage);
    }
    // check if memory usage for all memory pools are returned
    List pools = ManagementFactory.getMemoryPoolMXBeans();
    for (Iterator iter = pools.iterator(); iter.hasNext(); ) {
        MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
        if (!pnames.contains(p.getName())) {
            throw new RuntimeException("GcInfo does not contain " + "memory usage for pool " + p.getName());
        }
    }
}

Example 20 with MemoryPoolMXBean

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

the class HeapMemoryMonitor method startJVMThresholdListener.

/**
   * Register with the JVM to get threshold events.
   * 
   * Package private for testing.
   */
void startJVMThresholdListener() {
    final MemoryPoolMXBean memoryPoolMXBean = getTenuredMemoryPoolMXBean();
    // appropriate value.
    if (!testDisableMemoryUpdates) {
        memoryPoolMXBean.setCollectionUsageThreshold(1);
    }
    final long usageThreshold = memoryPoolMXBean.getUsageThreshold();
    this.cache.getLoggerI18n().info(LocalizedStrings.HeapMemoryMonitor_OVERRIDDING_MEMORYPOOLMXBEAN_HEAP_0_NAME_1, new Object[] { usageThreshold, memoryPoolMXBean.getName() });
    MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
    NotificationEmitter emitter = (NotificationEmitter) mbean;
    emitter.addNotificationListener(this, null, null);
}