Example usage for java.lang Runtime totalMemory

Introduction

In this page you can find the example usage for java.lang Runtime totalMemory.

Prototype

public native long totalMemory();

Source Link

Document

Returns the total amount of memory in the Java virtual machine.

Usage

From source file:onlinefrontlines.admin.web.ServerInfoAction.java

/**
  * Execute the action//from  w w  w. j  a v a2 s . c om
  */
protected WebView execute() throws Exception {
    Runtime r = Runtime.getRuntime();

    // Get stats
    date = new Date().toString();
    committedMemory = r.totalMemory();
    maxMemory = r.maxMemory();
    usedMemory = committedMemory - r.freeMemory();
    cpuCount = Runtime.getRuntime().availableProcessors();
    os = System.getProperty("os.name") + " (" + System.getProperty("sun.os.patch.level") + ") "
            + System.getProperty("os.arch") + " " + System.getProperty("os.version");
    jvm = System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version") + " "
            + System.getProperty("java.vm.name");
    for (String s : DbConnectionPool.getInstance().getDataSources().keySet())
        dataSourceStatus.put(s, getDataSourceStatus(s));
    servletContainer = servletContext.getServerInfo();

    return getSuccessView();
}

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From source file:org.ktunaxa.referral.server.service.SystemService.java

@Scheduled(fixedRate = 2000)
public void showLog() {
    int mb = 1024 * 1024;

    // Getting the runtime reference from system
    Runtime runtime = Runtime.getRuntime();

    log.info("##### Heap utilization statistics [MB] #####");

    // Print used memory
    log.info("Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / mb);

    // Print free memory
    log.info("Free Memory:" + runtime.freeMemory() / mb);

    // Print total available memory
    log.info("Total Memory:" + runtime.totalMemory() / mb);

    // Print Maximum available memory
    log.info("Max Memory:" + runtime.maxMemory() / mb);
}

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From source file:MIDletProps.java

/**
 * Show the value of the properties//w  ww.j  a v  a  2 s . com
 */
public void startApp() {
    Runtime runtime = Runtime.getRuntime();
    runtime.gc();
    long free = runtime.freeMemory();
    long total = runtime.totalMemory();

    propbuf = new StringBuffer(50);
    props = new Form("System Properties");

    props.append("Free Memory = " + free + "\n");
    props.append("Total Memory = " + total + "\n");

    props.append(showProp("microedition.configuration"));
    props.append(showProp("microedition.platform"));
    props.append(showProp("microedition.locale"));
    props.append(showProp("microedition.encoding"));
    props.append(showProp("microedition.encodingClass"));
    props.append(showProp("microedition.http_proxy"));

    props.addCommand(exitCommand);
    props.setCommandListener(this);

    display.setCurrent(props);

}

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From source file:com.liferay.portal.events.LogMemoryUsageAction.java

public void run(HttpServletRequest req, HttpServletResponse res) throws ActionException {

    Runtime runtime = Runtime.getRuntime();

    NumberFormat nf = NumberFormat.getInstance();

    String freeMemory = nf.format(runtime.freeMemory());
    String totalMemory = nf.format(runtime.totalMemory());
    String maxMemory = nf.format(runtime.maxMemory());

    _log.debug("Memory Usage:\t" + freeMemory + "\t" + totalMemory + "\t" + maxMemory);
}

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From source file:edu.umn.cs.spatialHadoop.util.MemoryReporter.java

@Override
public void run() {
    Runtime runtime = Runtime.getRuntime();
    while (true) {
        LOG.info(String.format("Free memory %s / Total memory %s", humanReadable(runtime.freeMemory()),
                humanReadable(runtime.totalMemory())));
        try {//from  w  w  w. j a  v  a 2s . c  o m
            Thread.sleep(1000 * 60);
        } catch (InterruptedException e) {
        }
    }
}

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From source file:org.onosproject.ospf.controller.impl.Controller.java

public Map<String, Long> getMemory() {
    Map<String, Long> m = new HashMap<>();
    Runtime runtime = Runtime.getRuntime();
    m.put("total", runtime.totalMemory());
    m.put("free", runtime.freeMemory());
    return m;//from  w  w  w  .  ja  v  a2s .c om
}

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From source file:ca.simplegames.micro.controllers.StatsController.java

public void execute(MicroContext context, Map configuration) throws ControllerException {
    Map<String, Object> systemInfo = new HashMap<String, Object>();
    Map<String, Object> osMap = new HashMap<String, Object>();
    MBeanServerConnection mbeanServer = ManagementFactory.getPlatformMBeanServer();

    OperatingSystemMXBean sunOperatingSystemMXBean = null;
    try {//  w ww  .  j a v  a2s. co  m
        sunOperatingSystemMXBean = ManagementFactory.newPlatformMXBeanProxy(mbeanServer,
                ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME, OperatingSystemMXBean.class);
    } catch (IOException e) {
        throw new ControllerException(e.getMessage());
    }

    Runtime rt = Runtime.getRuntime();
    long totalMemory = rt.totalMemory() / MEGA_BYTE;
    long freeMemory = rt.freeMemory() / MEGA_BYTE;
    long usedMemory = totalMemory - freeMemory;

    final long p100 = (int) Math.round(((double) freeMemory / (double) totalMemory) * 100);

    Map<String, Long> memInfo = new HashMap<String, Long>();

    memInfo.put("total", totalMemory);
    memInfo.put("used", usedMemory);
    memInfo.put("free", freeMemory);
    memInfo.put("percent_free", p100);

    systemInfo.put("memory", memInfo);
    systemInfo.put("powered_by", POWERED_BY_MICRO);

    //cpu usage in milli secs
    long currentCpuUsage = sunOperatingSystemMXBean.getProcessCpuTime() / 1000000;
    osMap.put("cpu_usage", currentCpuUsage);
    osMap.put("available_processors", sunOperatingSystemMXBean.getAvailableProcessors());
    osMap.put("system_load_average", sunOperatingSystemMXBean.getSystemLoadAverage());
    osMap.put("committed_virtual_memory_size", sunOperatingSystemMXBean.getCommittedVirtualMemorySize());
    osMap.put("free_physical_memory_size", sunOperatingSystemMXBean.getFreePhysicalMemorySize());
    osMap.put("total_physical_memory_size", sunOperatingSystemMXBean.getTotalPhysicalMemorySize());
    osMap.put("free_swap_space_size", sunOperatingSystemMXBean.getFreeSwapSpaceSize());
    osMap.put("total_swap_space_size", sunOperatingSystemMXBean.getTotalSwapSpaceSize());

    systemInfo.put("os", osMap);

    List<GarbageCollectorMXBean> gc = ManagementFactory.getGarbageCollectorMXBeans();
    List<Map> gcInfo = new ArrayList<Map>();

    for (GarbageCollectorMXBean aGc : gc) {
        Map<String, Object> gcMap = new HashMap<String, Object>();
        gcMap.put("name", aGc.getName());
        gcMap.put("collection_count", aGc.getCollectionCount());
        gcMap.put("collection_time", aGc.getCollectionTime());

        gcInfo.add(gcMap);
    }

    systemInfo.put("gc", gcInfo);

    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    Map<String, Object> threadInfoMap = new HashMap<String, Object>(); // more to come ;)
    threadInfoMap.put("peak_thread_count", threadMXBean.getPeakThreadCount());
    threadInfoMap.put("thread_count", threadMXBean.getThreadCount());
    threadInfoMap.put("total_started_thread_count", threadMXBean.getTotalStartedThreadCount());

    long[] deadlockedThreads = threadMXBean.findMonitorDeadlockedThreads();
    threadInfoMap.put("dead_locked_thread_count", deadlockedThreads != null ? deadlockedThreads.length : 0);
    systemInfo.put("thread_info", threadInfoMap);

    JSONObject sysinfoJson = new JSONObject(Collections.singletonMap("system_info", systemInfo));

    String sysinfoString = null;
    try {
        sysinfoString = context.getRequest().getParameter("pretty") != null ? sysinfoJson.toString(2)
                : sysinfoJson.toString();
    } catch (JSONException e) {
        e.printStackTrace();
        throw new ControllerException(e.getMessage());
    }

    context.getRackResponse().withContentType(Mime.mimeType(JSON_TYPE)).withBody(sysinfoString)
            .withContentLength(sysinfoString.length()).with(Rack.MESSAGE_STATUS, HttpServletResponse.SC_OK);

    context.halt();
}

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From source file:org.apache.pulsar.common.stats.JvmMetrics.java

public List<Metrics> generate() {

    Metrics m = createMetrics();/* w w w.  j  av  a2  s .  co  m*/

    Runtime r = Runtime.getRuntime();

    m.put("jvm_heap_used", r.totalMemory() - r.freeMemory());
    m.put("jvm_max_memory", r.maxMemory());
    m.put("jvm_total_memory", r.totalMemory());

    m.put("jvm_direct_memory_used", getJvmDirectMemoryUsed());
    m.put("jvm_max_direct_memory", PlatformDependent.maxDirectMemory());
    m.put("jvm_thread_cnt", getThreadCount());

    this.gcLogger.logMetrics(m);

    long totalAllocated = 0;
    long totalUsed = 0;

    for (PoolArenaMetric arena : PooledByteBufAllocator.DEFAULT.directArenas()) {
        for (PoolChunkListMetric list : arena.chunkLists()) {
            for (PoolChunkMetric chunk : list) {
                int size = chunk.chunkSize();
                int used = size - chunk.freeBytes();

                totalAllocated += size;
                totalUsed += used;
            }
        }
    }

    m.put(this.componentName + "_default_pool_allocated", totalAllocated);
    m.put(this.componentName + "_default_pool_used", totalUsed);

    return Lists.newArrayList(m);
}

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From source file:org.ngrinder.operation.cotroller.StatisticsController.java

/**
 * Get current jvm stat/*from  w ww .  ja  va 2s  . c o  m*/
 * 
 * @return map for jvm used/free/total/max
 */
private Map<String, Long> getJVMStat() {
    Runtime runtime = Runtime.getRuntime();

    Map<String, Long> stat = new HashMap<String, Long>();
    stat.put("used", runtime.totalMemory() - runtime.freeMemory());
    stat.put("free", runtime.freeMemory());
    stat.put("total", runtime.totalMemory());
    stat.put("max", runtime.maxMemory());

    return stat;
}

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From source file:com.betfair.tornjak.monitor.FreeMemoryMonitor.java

/**
 * Answers the amount of free memory in this runtime environment, as a percentage.
 *///from  w  ww  .j  a v a2  s  .c  o  m
@Override
@ManagedAttribute()
public int getFreeMemoryPercentage() {
    Runtime runtime = Runtime.getRuntime();
    // 'totalMemory' is how much heap we have *currently*
    // - this may increase up to 'maxMemory' (and can decrease)
    long totalMemory = runtime.totalMemory();
    // 'freeMemory' is 'totalMemory' - allocated)
    long freeMemory = runtime.freeMemory();
    // Work out how much we have used
    long allocatedMemory = totalMemory - freeMemory;
    // 'maxMemory' is equivalent to the JVM option '-Xmx'
    long maxMemory = runtime.maxMemory();
    // Work out the percentage used
    return (int) (100 - (allocatedMemory * 100 / maxMemory));
}

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