com.codahale.metrics.jvm.MemoryUsageGaugeSet Java Examples

private ServletContextHandler getMetricsHandler() {
    MetricRegistry registry = Metrics.getRegistry();
    HealthCheckRegistry healthCheckRegistry = Metrics.getHealthCheckRegistry();
    healthCheckRegistry.register("rotation", new Rotation(configuration.getRotationStatusFilePath()));

    registry.registerAll(new GarbageCollectorMetricSet());
    registry.registerAll(new MemoryUsageGaugeSet());
    registry.registerAll(new ThreadStatesGaugeSet());
    registry.registerAll(new JvmAttributeGaugeSet());

    ServletContextHandler servletContextHandler = new ServletContextHandler();
    servletContextHandler.setContextPath("/__metrics");
    servletContextHandler.setAttribute(MetricsServlet.class.getCanonicalName() + ".registry", registry);
    servletContextHandler.setAttribute(HealthCheckServlet.class.getCanonicalName() + ".registry", healthCheckRegistry);
    servletContextHandler.addServlet(new ServletHolder(new AdminServlet()), "/*");

    return servletContextHandler;
}
 

@PostConstruct
public void init() {
    /*
     * consoleReporter = ConsoleReporter.forRegistry(metricRegistry) .convertRatesTo(TimeUnit.SECONDS)
     * .convertDurationsTo(TimeUnit.MILLISECONDS) .build(); consoleReporter.start(1, TimeUnit.SECONDS);
     */
    GarbageCollectorMetricSet gc = new GarbageCollectorMetricSet();

    // FileDescriptorRatioGauge fd = new FileDescriptorRatioGauge();
    MemoryUsageGaugeSet mu = new MemoryUsageGaugeSet();

    // ThreadDeadlockDetector td = new ThreadDeadlockDetector();

    // ThreadDump t = new ThreadDump();
    ThreadStatesGaugeSet ts = new ThreadStatesGaugeSet();

    metricRegistry.register("GarbageCollector", gc);
    // registry.register(FileDescriptorRatioGauge.class.getName(), fd);
    metricRegistry.register("MemoryUsage", mu);
    // registry.register(ThreadDeadlockDetector.class.getName(), td);
    // registry.registerAll(t);
    metricRegistry.register("ThreadStates", ts);
    healthCheckRegistry.register("threadDeadlock",
            new ThreadDeadlockHealthCheck());
}
 

/**
 * Make sure that in a single life cycle the correct metrics are registered, the correct {@link ProcessGroupStatus}
 * is used and that metrics are actually reported.
 */
@Test
public void testValidLifeCycleReportsCorrectlyProcessGroupSpecified() throws Exception {
    reportingContextStub.setProperty(MetricsReportingTask.PROCESS_GROUP_ID.getName(), TEST_GROUP_ID);
    reportingContextStub.getEventAccess().setProcessGroupStatus(TEST_GROUP_ID, innerGroupStatus);

    testedReportingTask.initialize(reportingInitContextStub);
    testedReportingTask.connect(configurationContextStub);
    testedReportingTask.onTrigger(reportingContextStub);
    verify(reporterMock).report();

    // Verify correct metrics are registered
    ArgumentCaptor<MetricRegistry> registryCaptor = ArgumentCaptor.forClass(MetricRegistry.class);
    verify(reporterServiceStub).createReporter(registryCaptor.capture());
    MetricRegistry usedRegistry = registryCaptor.getValue();
    Map<String, Metric> usedMetrics = usedRegistry.getMetrics();
    assertTrue(usedMetrics.keySet().containsAll(new MemoryUsageGaugeSet().getMetrics().keySet()));
    assertTrue(usedMetrics.keySet()
            .containsAll(new FlowMetricSet(testedReportingTask.currentStatusReference).getMetrics().keySet()));

    // Verify the most current ProcessGroupStatus is updated
    assertEquals(testedReportingTask.currentStatusReference.get(), innerGroupStatus);
}
 

/**
 * Make sure that in a single life cycle the correct metrics are registered, the correct {@link ProcessGroupStatus}
 * is used and that metrics are actually reported.
 */
@Test
public void testValidLifeCycleReportsCorrectly() throws Exception {
    reportingContextStub.getEventAccess().setProcessGroupStatus(rootGroupStatus);

    testedReportingTask.initialize(reportingInitContextStub);
    testedReportingTask.connect(configurationContextStub);
    testedReportingTask.onTrigger(reportingContextStub);
    verify(reporterMock).report();

    // Verify correct metrics are registered
    ArgumentCaptor<MetricRegistry> registryCaptor = ArgumentCaptor.forClass(MetricRegistry.class);
    verify(reporterServiceStub).createReporter(registryCaptor.capture());
    MetricRegistry usedRegistry = registryCaptor.getValue();
    Map<String, Metric> usedMetrics = usedRegistry.getMetrics();
    assertTrue(usedMetrics.keySet().containsAll(new MemoryUsageGaugeSet().getMetrics().keySet()));
    assertTrue(usedMetrics.keySet()
            .containsAll(new FlowMetricSet(testedReportingTask.currentStatusReference).getMetrics().keySet()));

    // Verify the most current ProcessGroupStatus is updated
    assertEquals(testedReportingTask.currentStatusReference.get(), rootGroupStatus);
}
 

public static void main(String args[]) throws IOException, InterruptedException {
	ConsoleReporter reporter = ConsoleReporter.forRegistry(metrics).convertRatesTo(TimeUnit.SECONDS)
			.convertDurationsTo(TimeUnit.MILLISECONDS).build();
	metrics.register("jvm.mem", new MemoryUsageGaugeSet());
	metrics.register("jvm.gc", new GarbageCollectorMetricSet());
	reporter.start(5, TimeUnit.SECONDS);

	String hostName = "192.168.66.29";
	ZabbixSender zabbixSender = new ZabbixSender("192.168.90.102", 10051);
	ZabbixReporter zabbixReporter = ZabbixReporter.forRegistry(metrics).hostName(hostName).prefix("test.")
			.build(zabbixSender);

	zabbixReporter.start(1, TimeUnit.SECONDS);

	TimeUnit.SECONDS.sleep(500);
}
 

private void setupJvmMetrics(CoreContainer coresInit)  {
  metricManager = coresInit.getMetricManager();
  registryName = SolrMetricManager.getRegistryName(SolrInfoBean.Group.jvm);
  final Set<String> hiddenSysProps = coresInit.getConfig().getMetricsConfig().getHiddenSysProps();
  try {
    metricManager.registerAll(registryName, new AltBufferPoolMetricSet(), SolrMetricManager.ResolutionStrategy.IGNORE, "buffers");
    metricManager.registerAll(registryName, new ClassLoadingGaugeSet(), SolrMetricManager.ResolutionStrategy.IGNORE, "classes");
    metricManager.registerAll(registryName, new OperatingSystemMetricSet(), SolrMetricManager.ResolutionStrategy.IGNORE, "os");
    metricManager.registerAll(registryName, new GarbageCollectorMetricSet(), SolrMetricManager.ResolutionStrategy.IGNORE, "gc");
    metricManager.registerAll(registryName, new MemoryUsageGaugeSet(), SolrMetricManager.ResolutionStrategy.IGNORE, "memory");
    metricManager.registerAll(registryName, new ThreadStatesGaugeSet(), SolrMetricManager.ResolutionStrategy.IGNORE, "threads"); // todo should we use CachedThreadStatesGaugeSet instead?
    MetricsMap sysprops = new MetricsMap((detailed, map) -> {
      System.getProperties().forEach((k, v) -> {
        if (!hiddenSysProps.contains(k)) {
          map.put(String.valueOf(k), v);
        }
      });
    });
    metricManager.registerGauge(null, registryName, sysprops, metricTag, true, "properties", "system");
  } catch (Exception e) {
    log.warn("Error registering JVM metrics", e);
  }
}
 

public CloudWatchReporter build() {

            if (withJvmMetrics) {
                metricRegistry.register("jvm.uptime", (Gauge<Long>) () -> ManagementFactory.getRuntimeMXBean().getUptime());
                metricRegistry.register("jvm.current_time", (Gauge<Long>) clock::getTime);
                metricRegistry.register("jvm.classes", new ClassLoadingGaugeSet());
                metricRegistry.register("jvm.fd_usage", new FileDescriptorRatioGauge());
                metricRegistry.register("jvm.buffers", new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
                metricRegistry.register("jvm.gc", new GarbageCollectorMetricSet());
                metricRegistry.register("jvm.memory", new MemoryUsageGaugeSet());
                metricRegistry.register("jvm.thread-states", new ThreadStatesGaugeSet());
            }

            cwRateUnit = cwMeterUnit.orElse(toStandardUnit(rateUnit));
            cwDurationUnit = toStandardUnit(durationUnit);

            return new CloudWatchReporter(this);
        }
 

public void start() {
  setMetricsReporter(metricsGroupName);

  final String jvmMetricsName = metricsGroupName + "-JVM";
  setMetricsReporter(jvmMetricsName);

  if(!inited) {
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "MEMORY"), new MemoryUsageGaugeSet());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "FILE"), new FileDescriptorRatioGauge());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "GC"), new GarbageCollectorMetricSet());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "THREAD"), new ThreadStatesGaugeSet());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "LOG"), new LogEventGaugeSet());
    jmxReporter = JmxReporter.forRegistry(metricRegistry).inDomain("Tajo")
            .createsObjectNamesWith(new TajoJMXObjectNameFactory()).build();
    jmxReporter.start();
  }
  inited = true;
}
 

public void start() {
  setMetricsReporter(metricsGroupName);

  String jvmMetricsName = metricsGroupName + "-jvm";
  setMetricsReporter(jvmMetricsName);

  if(!inited) {
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "Heap"), new MemoryUsageGaugeSet());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "File"), new FileDescriptorRatioGauge());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "GC"), new GarbageCollectorMetricSet());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "Thread"), new ThreadStatesGaugeSet());
    metricRegistry.register(MetricRegistry.name(jvmMetricsName, "Log"), new LogEventGaugeSet());
  }
  inited = true;
}
 

@Before
public void setUp() {
    final MetricRegistry metrics = new MetricRegistry();
    metrics.registerAll(new MemoryUsageGaugeSet());
    metrics.registerAll(new GarbageCollectorMetricSet());
    metricReporter = Slf4jReporter.forRegistry(metrics)
        .filter((name, metric) -> name.matches("(.*heap|pools.PS.*).usage"))
        .withLoggingLevel(Slf4jReporter.LoggingLevel.DEBUG)
        .convertRatesTo(TimeUnit.SECONDS)
        .convertDurationsTo(TimeUnit.MILLISECONDS)
        .build();
    metricReporter.start(60, TimeUnit.SECONDS);
}
 

@Before
    public void setUp() {
        final MetricRegistry metrics = new MetricRegistry();
        metrics.registerAll(new MemoryUsageGaugeSet());
        metrics.registerAll(new GarbageCollectorMetricSet());
        metricReporter = ConsoleReporter.forRegistry(metrics)
            .filter((name, metric) -> name.matches("(.*heap|total).(usage|used)"))
//                .withLoggingLevel(Slf4jReporter.LoggingLevel.DEBUG)
            .convertRatesTo(TimeUnit.SECONDS)
            .convertDurationsTo(TimeUnit.MILLISECONDS)
            .build();
        metricReporter.start(60, TimeUnit.SECONDS);
        performanceReport = new TreeMap<>();
    }
 

@Test
public void testJVMMetrics() throws InterruptedException {
    LOG.info("Starting testJVMMetrics");
    final MetricRegistry metrics = new MetricRegistry();
    ConsoleReporter reporter = ConsoleReporter.forRegistry(metrics)
        .convertRatesTo(TimeUnit.SECONDS)
        .convertDurationsTo(TimeUnit.MILLISECONDS)
        .build();
    metrics.registerAll(new MemoryUsageGaugeSet());
    metrics.register("sample", (Gauge<Double>) () -> 0.1234);
    reporter.start(1, TimeUnit.SECONDS);
    reporter.close();
}
 

@Provides @Singleton MetricRegistry provideMetrics() {
  MetricRegistry metrics = new MetricRegistry();
  metrics.register("jvm.memory", new MemoryUsageGaugeSet());
  metrics.register("jvm.garbage", new GarbageCollectorMetricSet());
  metrics.register("jvm.threads", new ThreadStatesGaugeSet());
  metrics.register("jvm.files", new FileDescriptorRatioGauge());
  metrics.register("jvm.buffers", new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
  return metrics;
}
 

/**
 * ThreadStatesGaugeSet & ClassLoadingGaugeSet are currently not registered.
 * metricRegistry.register("threads", new ThreadStatesGaugeSet());
 */
private StreamingMetrics() {
    if (METRICS_OPTION != null && !METRICS_OPTION.isEmpty()) {
        metricRegistry.register("gc", new GarbageCollectorMetricSet());
        metricRegistry.register("threads", new CachedThreadStatesGaugeSet(10, TimeUnit.SECONDS));
        metricRegistry.register("memory", new MemoryUsageGaugeSet());
    }
}
 

public void start() {
    metricRegistry.register("jvm.file.descriptor", new FileDescriptorRatioGauge());
    metricRegistry.register("jvm.gc", new GarbageCollectorMetricSet());
    metricRegistry.register("jvm.threads", new ThreadStatesGaugeSet());
    metricRegistry.register("jvm.memory", new MemoryUsageGaugeSet());
    metricRegistry.register("jvm.class.loading", new ClassLoadingGaugeSet());
}
 

private void registerJvmMetricSets() {
  metrics.registerAll(new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
  metrics.registerAll(new CachedThreadStatesGaugeSet(5, TimeUnit.MINUTES));
  metrics.registerAll(new ClassLoadingGaugeSet());
  metrics.registerAll(new GarbageCollectorMetricSet());
  metrics.registerAll(new JvmAttributeGaugeSet());
  metrics.registerAll(new MemoryUsageGaugeSet());
}
 

public RegisterJVMMetrics(CommandBuilder builder, Config config, Command parent, 
                                   Command child, final MorphlineContext context) {
  
  super(builder, config, parent, child, context);      
  validateArguments();
  
  MetricRegistry registry = context.getMetricRegistry();
  BufferPoolMetricSet bufferPoolMetrics = new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer());
  registerAll("jvm.buffers", bufferPoolMetrics, registry);
  registerAll("jvm.gc", new GarbageCollectorMetricSet(), registry);
  registerAll("jvm.memory", new MemoryUsageGaugeSet(), registry);
  registerAll("jvm.threads", new ThreadStatesGaugeSet(), registry);
  register("jvm.fileDescriptorCountRatio", new FileDescriptorRatioGauge(), registry);
  context.getHealthCheckRegistry().register("deadlocks", new ThreadDeadlockHealthCheck());
}
 

private void registerJvmMetrics() {
  registerMetricSetWithPrefix("jvm.gc", new GarbageCollectorMetricSet());
  registerMetricSetWithPrefix("jvm.memory", new MemoryUsageGaugeSet());
  registerMetricSetWithPrefix("jvm.threads", new ThreadStatesGaugeSet());
  this.metricRegistry.register("jvm.fileDescriptorRatio", new FileDescriptorRatioGauge());
  for (Map.Entry<String, MetricSet> metricSet : this.additionalMetricSets.entrySet()) {
    registerMetricSetWithPrefix(metricSet.getKey(), metricSet.getValue());
  }
}
 

/***
    * Initializes the metrics registry
    *
    * @return metric registry bean
    */
@Bean
public MetricRegistry metricRegistry() {
	final MetricRegistry bean = new MetricRegistry();

       // add JVM metrics
	bean.register("jvm.gc", new GarbageCollectorMetricSet());
	bean.register("jvm.memory", new MemoryUsageGaugeSet());
	bean.register("jvm.thread-states", new ThreadStatesGaugeSet());
	bean.register("jvm.fd", new FileDescriptorRatioGauge());

	return bean;
}
 

/**
 * Initializes the metrics registry
 *
 * @return metric registry bean
 */
@Bean
public MetricRegistry metricRegistry() {
    final MetricRegistry bean = new MetricRegistry();

    // add JVM metrics
    bean.register("jvm.gc", new GarbageCollectorMetricSet());
    bean.register("jvm.memory", new MemoryUsageGaugeSet());
    bean.register("jvm.thread-states", new ThreadStatesGaugeSet());
    bean.register("jvm.fd", new FileDescriptorRatioGauge());
    bean.register("jvm.load-average", new Gauge<Double>() {
        private OperatingSystemMXBean mxBean = ManagementFactory.getOperatingSystemMXBean();

        public Double getValue() {
            try {
                return mxBean.getSystemLoadAverage();
            } catch (Exception e) {
                // not supported
                return -1d;
            }
        }
    });

    // add Logback metrics
    final LoggerContext factory = (LoggerContext) LoggerFactory.getILoggerFactory();
    final Logger root = factory.getLogger(Logger.ROOT_LOGGER_NAME);
    final InstrumentedAppender appender = new InstrumentedAppender(bean);
    appender.setContext(root.getLoggerContext());
    appender.start();
    root.addAppender(appender);

    return bean;
}
 

private void initRegistry() {
    // add JVM statistics
    metricRegistry.register("jvm.memory", new MemoryUsageGaugeSet());
    metricRegistry.register("jvm.vm", new JvmAttributeGaugeSet());
    metricRegistry.register("jvm.garbage-collectors", new GarbageCollectorMetricSet());
    metricRegistry.register("jvm.thread-states", new ThreadStatesGaugeSet());

    if (hBaseAsyncOperationMetrics != null) {
        Map<String, Metric> metrics = hBaseAsyncOperationMetrics.getMetrics();
        for (Map.Entry<String, Metric> metric : metrics.entrySet()) {
            metricRegistry.register(metric.getKey(), metric.getValue());
        }
    }
}
 

public static JmxJvmMetrics getInstance() {
    if (metricRegistry.get() == null) {
        metricRegistry.set(new MetricRegistry());
        metricRegistry.get().register(REGISTRY_METRICSET_JVM_ATTRIBUTES, new JvmAttributeGaugeSet());
        metricRegistry.get().register(REGISTRY_METRICSET_MEMORY, new MemoryUsageGaugeSet());
        metricRegistry.get().register(REGISTRY_METRICSET_THREADS, new ThreadStatesGaugeSet());
        metricRegistry.get().register(REGISTRY_METRICSET_GARBAGE_COLLECTORS, new GarbageCollectorMetricSet());
        metricRegistry.get().register(OS_FILEDESCRIPTOR_USAGE, new FileDescriptorRatioGauge());

    }
    return new JmxJvmMetrics();
}
 

/**
 * Register all wanted metrics to {@link #metricRegistry}.
 * <p>
 * {@inheritDoc}
 */
@Override
protected void init(ReportingInitializationContext config) {
    metricRegistry = new MetricRegistry();
    currentStatusReference = new AtomicReference<>();
    metricRegistry.registerAll(new MemoryUsageGaugeSet());
    metricRegistry.registerAll(new FlowMetricSet(currentStatusReference));
}
 

private SentryMetrics() {
  registerMetricSet("gc", new GarbageCollectorMetricSet(), SentryMetricsServletContextListener.METRIC_REGISTRY);
  registerMetricSet("buffers", new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()),
      SentryMetricsServletContextListener.METRIC_REGISTRY);
  registerMetricSet("memory", new MemoryUsageGaugeSet(), SentryMetricsServletContextListener.METRIC_REGISTRY);
  registerMetricSet("threads", new ThreadStatesGaugeSet(), SentryMetricsServletContextListener.METRIC_REGISTRY);
}
 

private static void registerSystemMetrics() {
  REGISTRY.registerAll(new GarbageCollectorMetricSet());
  REGISTRY.registerAll(new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
  REGISTRY.registerAll(new MemoryUsageGaugeSet());
  REGISTRY.registerAll(new ThreadStatesGaugeSet());
  REGISTRY.registerAll(new CpuGaugeSet());
  register("fd.usage", new FileDescriptorRatioGauge());
}
 

/**
 * Register desired metrics.
 *
 * @param conf The current Hadoop configuration.
 */
private static void registerMetrics(Configuration conf)
{
  bookKeeperMetrics = new BookKeeperMetrics(conf, metrics);

  metrics.register(BookKeeperMetrics.LDTSJvmMetric.LDTS_JVM_GC_PREFIX.getMetricName(), new GarbageCollectorMetricSet());
  metrics.register(BookKeeperMetrics.LDTSJvmMetric.LDTS_JVM_THREADS_PREFIX.getMetricName(), new CachedThreadStatesGaugeSet(CacheConfig.getMetricsReportingInterval(conf), TimeUnit.MILLISECONDS));
  metrics.register(BookKeeperMetrics.LDTSJvmMetric.LDTS_JVM_MEMORY_PREFIX.getMetricName(), new MemoryUsageGaugeSet());
}
 

@PostConstruct
public void init() {
    log.debug("Registering JVM gauges");
    metricRegistry.register(PROP_METRIC_REG_JVM_MEMORY, new MemoryUsageGaugeSet());
    metricRegistry.register(PROP_METRIC_REG_JVM_GARBAGE, new GarbageCollectorMetricSet());
    metricRegistry.register(PROP_METRIC_REG_JVM_THREADS, new ThreadStatesGaugeSet());
    metricRegistry.register(PROP_METRIC_REG_JVM_FILES, new FileDescriptorRatioGauge());
    metricRegistry.register(PROP_METRIC_REG_JVM_BUFFERS, new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
    if (hikariDataSource != null) {
        log.debug("Monitoring the datasource");
        hikariDataSource.setMetricRegistry(metricRegistry);
    }
    if (jHipsterProperties.getMetrics().getJmx().isEnabled()) {
        log.debug("Initializing Metrics JMX reporting");
        JmxReporter jmxReporter = JmxReporter.forRegistry(metricRegistry).build();
        jmxReporter.start();
    }
    if (jHipsterProperties.getMetrics().getLogs().isEnabled()) {
        log.info("Initializing Metrics Log reporting");
        final Slf4jReporter reporter = Slf4jReporter.forRegistry(metricRegistry)
            .outputTo(LoggerFactory.getLogger("metrics"))
            .convertRatesTo(TimeUnit.SECONDS)
            .convertDurationsTo(TimeUnit.MILLISECONDS)
            .build();
        reporter.start(jHipsterProperties.getMetrics().getLogs().getReportFrequency(), TimeUnit.SECONDS);
    }
}
 

/**
 * ThreadStatesGaugeSet & ClassLoadingGaugeSet are currently not registered.
 * metricRegistry.register("threads", new ThreadStatesGaugeSet());
 */
private StreamingMetrics() {
    if (METRICS_OPTION != null && !METRICS_OPTION.isEmpty()) {
        metricRegistry.register("gc", new GarbageCollectorMetricSet());
        metricRegistry.register("threads", new CachedThreadStatesGaugeSet(10, TimeUnit.SECONDS));
        metricRegistry.register("memory", new MemoryUsageGaugeSet());
    }
}
 

protected void initMetrics() {
    if (this.conf.findBooleanEntry("JVM_METRICS_ENABLED", false)) {
        logger.debug("JVM Metrics are enabled");
        this.metrics.registerAll(new MemoryUsageGaugeSet());
        this.metrics.registerAll(new GarbageCollectorMetricSet());
        this.metrics.registerAll(new ThreadStatesGaugeSet());
        this.metrics.register("file.descriptor.info", new FileDescriptorRatioGauge());
    } else {
        logger.debug("JVM Metrics are disabled");
    }
}
 

static void addJvmMetrics(MetricRegistries registries) {
  MetricRegistryInfo info = new MetricRegistryInfo("jvm", "ratis_jvm", "jvm", "jvm metrics");

  RatisMetricRegistry registry = registries.create(info);

  registry.registerAll("gc", new GarbageCollectorMetricSet());
  registry.registerAll("memory", new MemoryUsageGaugeSet());
  registry.registerAll("threads", new ThreadStatesGaugeSet());
  registry.registerAll("classLoading", new ClassLoadingGaugeSet());
}