Example usage for java.lang.management MemoryPoolMXBean getName

List of usage examples for java.lang.management MemoryPoolMXBean getName

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Introduction

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

Prototype

public String getName();

Source Link

Document

Returns the name representing this memory pool.

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  v  a2 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);
            }
        }
    });
}

From source file:com.thoughtworks.go.server.service.support.ServerRuntimeInformationProvider.java

private void poolInfo(InformationStringBuilder builder) {
    builder.addSection("Memory pool information");

    List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean memoryPoolMXBean : memoryPoolMXBeans) {
        builder.append(String.format("Name: %s, Type: %s\n%s\n", memoryPoolMXBean.getName(),
                memoryPoolMXBean.getType(), format(memoryPoolMXBean.getUsage())));
    }/*w  ww  .  ja  va 2  s  .co  m*/
}

From source file:VerboseGC.java

/**
 * Prints the verbose GC log to System.out to list the memory usage of all
 * memory pools as well as the GC statistics.
 *//*ww  w . j a  va  2  s .  c om*/
public void printVerboseGc() {
    System.out.print("Uptime: " + formatMillis(rmbean.getUptime()));
    for (GarbageCollectorMXBean gc : gcmbeans) {
        System.out.print(" [" + gc.getName() + ": ");
        System.out.print("Count=" + gc.getCollectionCount());
        System.out.print(" GCTime=" + formatMillis(gc.getCollectionTime()));
        System.out.print("]");
    }
    System.out.println();
    for (MemoryPoolMXBean p : pools) {
        System.out.print("  [" + p.getName() + ":");
        MemoryUsage u = p.getUsage();
        System.out.print(" Used=" + formatBytes(u.getUsed()));
        System.out.print(" Committed=" + formatBytes(u.getCommitted()));
        System.out.println("]");
    }
}

From source file:controllers.api.core.RootApiController.java

/**
 * Return some information regarding the memory status of the instance.
 *//*  w  w  w  . ja v a2s .co m*/
@ApiAuthentication(onlyRootKey = true)
public Result instanceMemoryStatus() {

    try {

        RootResponse response = new RootResponse();

        response.attributes = new HashMap<String, JsonNode>();
        List<MemoryPoolMXBean> mbeans = ManagementFactory.getMemoryPoolMXBeans();
        if (mbeans != null) {
            for (MemoryPoolMXBean mbean : mbeans) {
                System.out.println(mbean.getName());
                MemoryUsage memUsage = mbean.getUsage();
                HashMap<String, Long> memoryUsageAsMap = new HashMap<String, Long>();
                memoryUsageAsMap.put("init", memUsage.getInit());
                memoryUsageAsMap.put("max", memUsage.getMax());
                memoryUsageAsMap.put("committed", memUsage.getCommitted());
                memoryUsageAsMap.put("used", memUsage.getUsed());
                response.attributes.put(mbean.getName(), Json.toJson(memoryUsageAsMap));
            }
        }

        return getJsonSuccessResponse(response);

    } catch (Exception e) {

        return getJsonErrorResponse(new ApiError(500, "INTERNAL SERVER ERROR", e));

    }
}

From source file:edu.usu.sdl.openstorefront.web.rest.service.Application.java

@GET
@RequireAdmin//  w  w w.j  a  va 2  s  .com
@APIDescription("Gets the application system status")
@Produces({ MediaType.APPLICATION_JSON })
@DataType(ApplicationStatus.class)
@Path("/status")
public Response getApplicationStatus() {
    OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
    RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
    List<GarbageCollectorMXBean> garbageCollectorMXBeans = ManagementFactory.getGarbageCollectorMXBeans();
    MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
    List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans();
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();

    ApplicationStatus applicationStatus = new ApplicationStatus();
    applicationStatus.setApplicationVersion(PropertiesManager.getApplicationVersion());
    applicationStatus.setProcessorCount(operatingSystemMXBean.getAvailableProcessors());
    applicationStatus.setSystemLoad(operatingSystemMXBean.getSystemLoadAverage());
    applicationStatus.setSystemProperties(runtimeMXBean.getSystemProperties());

    applicationStatus.getHeapMemoryStatus().setName("Heap");
    applicationStatus.getHeapMemoryStatus().setDetails(memoryMXBean.getHeapMemoryUsage().toString());
    applicationStatus.getHeapMemoryStatus()
            .setInitKb(memoryMXBean.getHeapMemoryUsage().getInit() != 0
                    ? memoryMXBean.getHeapMemoryUsage().getInit() / 1024
                    : 0);
    applicationStatus.getHeapMemoryStatus()
            .setUsedKb(memoryMXBean.getHeapMemoryUsage().getUsed() != 0
                    ? memoryMXBean.getHeapMemoryUsage().getUsed() / 1024
                    : 0);
    applicationStatus.getHeapMemoryStatus()
            .setMaxKb(memoryMXBean.getHeapMemoryUsage().getMax() != 0
                    ? memoryMXBean.getHeapMemoryUsage().getMax() / 1024
                    : 0);
    applicationStatus.getHeapMemoryStatus()
            .setCommitedKb(memoryMXBean.getHeapMemoryUsage().getCommitted() != 0
                    ? memoryMXBean.getHeapMemoryUsage().getCommitted() / 1024
                    : 0);

    applicationStatus.getNonHeapMemoryStatus().setName("Non-Heap");
    applicationStatus.getNonHeapMemoryStatus().setDetails(memoryMXBean.getNonHeapMemoryUsage().toString());
    applicationStatus.getNonHeapMemoryStatus()
            .setInitKb(memoryMXBean.getNonHeapMemoryUsage().getInit() != 0
                    ? memoryMXBean.getNonHeapMemoryUsage().getInit() / 1024
                    : 0);
    applicationStatus.getNonHeapMemoryStatus()
            .setUsedKb(memoryMXBean.getNonHeapMemoryUsage().getUsed() != 0
                    ? memoryMXBean.getNonHeapMemoryUsage().getUsed() / 1024
                    : 0);
    applicationStatus.getNonHeapMemoryStatus()
            .setMaxKb(memoryMXBean.getNonHeapMemoryUsage().getMax() != 0
                    ? memoryMXBean.getNonHeapMemoryUsage().getMax() / 1024
                    : 0);
    applicationStatus.getNonHeapMemoryStatus()
            .setCommitedKb(memoryMXBean.getNonHeapMemoryUsage().getCommitted() != 0
                    ? memoryMXBean.getNonHeapMemoryUsage().getCommitted() / 1024
                    : 0);

    applicationStatus.setLiveThreadCount(threadMXBean.getThreadCount());
    applicationStatus.setTotalThreadCount(threadMXBean.getTotalStartedThreadCount());

    applicationStatus.setStartTime(new Date(runtimeMXBean.getStartTime()));
    applicationStatus.setUpTime(TimeUtil.millisToString(runtimeMXBean.getUptime()));

    for (GarbageCollectorMXBean garbageCollectorMXBean : garbageCollectorMXBeans) {
        applicationStatus.getGarbageCollectionInfos()
                .add(TimeUtil.millisToString(garbageCollectorMXBean.getCollectionTime()) + " - ("
                        + garbageCollectorMXBean.getCollectionCount() + ")");
    }

    for (MemoryPoolMXBean memoryPoolMXBean : memoryPoolMXBeans) {
        MemoryPoolStatus memoryPoolStatus = new MemoryPoolStatus();
        memoryPoolStatus.setName(memoryPoolMXBean.getName() + " - " + memoryPoolMXBean.getType());
        memoryPoolStatus.setDetails(memoryPoolMXBean.getUsage().toString());
        memoryPoolStatus.setInitKb(
                memoryPoolMXBean.getUsage().getInit() != 0 ? memoryPoolMXBean.getUsage().getInit() / 1024 : 0);
        memoryPoolStatus.setUsedKb(
                memoryPoolMXBean.getUsage().getUsed() != 0 ? memoryPoolMXBean.getUsage().getUsed() / 1024 : 0);
        memoryPoolStatus.setMaxKb(
                memoryPoolMXBean.getUsage().getMax() != 0 ? memoryPoolMXBean.getUsage().getMax() / 1024 : 0);
        memoryPoolStatus.setCommitedKb(memoryPoolMXBean.getUsage().getCommitted() != 0
                ? memoryPoolMXBean.getUsage().getCommitted() / 1024
                : 0);

        applicationStatus.getMemoryPools().add(memoryPoolStatus);
    }

    return sendSingleEntityResponse(applicationStatus);
}

From source file:com.eurelis.opencms.admin.systeminformation.CmsMemoryOverviewDialog.java

/**
 * Creates the list of widgets for this dialog.<p>
 *//*  w w  w  .  ja v a2  s  .  c om*/
protected void defineWidgets() {

    // initialize the cache object to use for the dialog
    initInfosObject();

    setKeyPrefix(KEY_PREFIX);

    // widgets to display
    addWidget(new CmsWidgetDialogParameter(m_adminSettings, "interval", PAGES[0], new CmsDisplayWidget()));

    for (java.lang.management.MemoryPoolMXBean item : ManagementFactory.getMemoryPoolMXBeans()) {
        String name = item.getName();
        if (name.toLowerCase().contains("perm")) {
            addWidget(new CmsWidgetDialogParameter(m_adminSettings, "displayMemPerm", PAGES[0],
                    new CmsCheckboxWidget()));
        } else if (name.toLowerCase().contains("old")) {
            addWidget(new CmsWidgetDialogParameter(m_adminSettings, "displayMemOld", PAGES[0],
                    new CmsCheckboxWidget()));
        } else if (name.toLowerCase().contains("eden")) {
            addWidget(new CmsWidgetDialogParameter(m_adminSettings, "displayMemEden", PAGES[0],
                    new CmsCheckboxWidget()));
        } else if (name.toLowerCase().contains("survivor")) {
            addWidget(new CmsWidgetDialogParameter(m_adminSettings, "displayMemSurvivor", PAGES[0],
                    new CmsCheckboxWidget()));
        }
    }

    // widgets to display
    int lineNumber = 5;
    int countItem = 0;
    for (java.lang.management.MemoryPoolMXBean item : ManagementFactory.getMemoryPoolMXBeans()) {
        String name = item.getName();

        if (name.toLowerCase().contains("perm")) {
            if (m_adminSettings.getDisplayMemPerm()) {
                addWidget(new CmsWidgetDialogParameter(this, "memPermMax", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memPermTotal", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memPermUsed", PAGES[0], new CmsDisplayWidget()));
                lineNumber = lineNumber + 3;
                countItem++;
            }
        } else if (name.toLowerCase().contains("old")) {
            if (m_adminSettings.getDisplayMemOld()) {
                addWidget(new CmsWidgetDialogParameter(this, "memOldMax", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memOldTotal", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memOldUsed", PAGES[0], new CmsDisplayWidget()));
                lineNumber = lineNumber + 3;
                countItem++;
            }
        } else if (name.toLowerCase().contains("eden")) {
            if (m_adminSettings.getDisplayMemEden()) {
                addWidget(new CmsWidgetDialogParameter(this, "memEdenMax", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memEdenTotal", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memEdenUsed", PAGES[0], new CmsDisplayWidget()));
                lineNumber = lineNumber + 3;
                countItem++;
            }
        } else if (name.toLowerCase().contains("survivor")) {
            if (m_adminSettings.getDisplayMemSurvivor()) {
                //if(CmsAdminSettings.getSettingsDisplayMemSurvivorValue(getCms(), getSession())){
                addWidget(
                        new CmsWidgetDialogParameter(this, "memSurvivorMax", PAGES[0], new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memSurvivorTotal", PAGES[0],
                        new CmsDisplayWidget()));
                addWidget(new CmsWidgetDialogParameter(this, "memSurvivorUsed", PAGES[0],
                        new CmsDisplayWidget()));
                lineNumber = lineNumber + 3;
                countItem++;
            }
        } else {
            //LOG.debug("MemoryPoolMXBean name = " + name.toLowerCase());
        }

    }
}

From source file:com.eurelis.opencms.admin.systeminformation.CmsMemoryOverviewDialog.java

/**
 * Initializes the infos object.<p>
 *//*from   w w w .jav a  2  s .c  o m*/
protected void initInfosObject() {

    com.sun.management.OperatingSystemMXBean sunOsBean = (com.sun.management.OperatingSystemMXBean) ManagementFactory
            .getOperatingSystemMXBean();
    java.lang.management.OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
    java.lang.management.ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    java.lang.management.RuntimeMXBean runtimeBean = ManagementFactory.getRuntimeMXBean();
    java.lang.management.ClassLoadingMXBean classesBean = ManagementFactory.getClassLoadingMXBean();

    for (java.lang.management.MemoryPoolMXBean item : ManagementFactory.getMemoryPoolMXBeans()) {
        java.lang.management.MemoryUsage mu = item.getUsage();
        String name = item.getName();

        if (name.toLowerCase().contains("perm")) {
            setMemPermMax("" + mu.getMax());
            setMemPermTotal("" + mu.getCommitted());
            setMemPermUsed("" + mu.getUsed());
        } else if (name.toLowerCase().contains("old")) {
            setMemOldMax("" + mu.getMax());
            setMemOldTotal("" + mu.getCommitted());
            setMemOldUsed("" + mu.getUsed());
        } else if (name.toLowerCase().contains("eden")) {
            setMemEdenMax("" + mu.getMax());
            setMemEdenTotal("" + mu.getCommitted());
            setMemEdenUsed("" + mu.getUsed());
        } else if (name.toLowerCase().contains("survivor")) {
            setMemSurvivorMax("" + mu.getMax());
            setMemSurvivorTotal("" + mu.getCommitted());
            setMemSurvivorUsed("" + mu.getUsed());
        } else {
            //LOG.debug("MemoryPoolMXBean name = " + name.toLowerCase());
        }
    }

    Object o;
    if (CmsStringUtil.isEmpty(getParamAction())) {
        o = new CmsAdminSettings(getSession());
    } else {
        // this is not the initial call, get the job object from session
        o = getDialogObject();
    }
    if (!(o instanceof CmsAdminSettings)) {
        // create a new history settings handler object
        m_adminSettings = new CmsAdminSettings(getSession());
    } else {
        // reuse html import handler object stored in session
        m_adminSettings = (CmsAdminSettings) o;
    }

    setParamCloseLink(getJsp()
            .link("/system/workplace/views/admin/admin-main.jsp?path=/eurelis_system_information/memory.jsp"));
}

From source file:com.eurelis.opencms.admin.systeminformation.CmsMemoryOverviewDialog.java

/**
 * Creates the dialog HTML for all defined widgets of the named dialog (page).<p>
 * /*from www  .  j  a v a  2 s.co m*/
 * This overwrites the method from the super class to create a layout variation for the widgets.<p>
 * 
 * @param dialog the dialog (page) to get the HTML for
 * @return the dialog HTML for all defined widgets of the named dialog (page)
 */
protected String createDialogHtml(String dialog) {

    StringBuffer result = new StringBuffer(1024);

    // create widget table
    result.append(createWidgetTableStart());

    // show error header once if there were validation errors
    result.append(createWidgetErrorHeader());

    if (dialog.equals(PAGES[0])) {

        //settings
        result.append(dialogBlockStart(key(Messages.GUI_SYSTEMINFORMATION_MEMORY_ADMIN_TOOL_BLOCK_SETTINGS)));
        result.append(createWidgetTableStart());
        result.append(createDialogRowsHtml(0, 0));

        int lineNumber = 1;

        String listOfMemories = "";
        for (java.lang.management.MemoryPoolMXBean item : ManagementFactory.getMemoryPoolMXBeans()) {
            String name = item.getName();
            listOfMemories = listOfMemories + name + ",";
            if (name.toLowerCase().contains("perm")) {
                result.append(createDialogRowsHtml(lineNumber, lineNumber));
                lineNumber = lineNumber + 1;
            } else if (name.toLowerCase().contains("old")) {
                result.append(createDialogRowsHtml(lineNumber, lineNumber));
                lineNumber = lineNumber + 1;
            } else if (name.toLowerCase().contains("eden")) {
                result.append(createDialogRowsHtml(lineNumber, lineNumber));
                lineNumber = lineNumber + 1;
            } else if (name.toLowerCase().contains("survivor")) {
                result.append(createDialogRowsHtml(lineNumber, lineNumber));
                lineNumber = lineNumber + 1;
            }
        }
        LOG.debug("createDialogHtml() :: listOfMemories = " + listOfMemories);

        result.append(createWidgetTableEnd());
        result.append(dialogBlockEnd());

        // create the widgets for the first dialog page
        for (java.lang.management.MemoryPoolMXBean item : ManagementFactory.getMemoryPoolMXBeans()) {
            String name = item.getName();

            if (name.toLowerCase().contains("perm")) {
                if (m_adminSettings.getDisplayMemPerm()) {
                    result.append(dialogBlockStart(
                            key(Messages.GUI_SYSTEMINFORMATION_MEMORY_ADMIN_TOOL_BLOCK_) + name.toUpperCase()));
                    result.append(createWidgetTableStart());
                    result.append(createDialogRowsHtml(lineNumber, lineNumber + 2));
                    result.append(createWidgetTableEnd());
                    result.append(dialogBlockEnd());
                    lineNumber = lineNumber + 3;
                }
            } else if (name.toLowerCase().contains("old")) {
                if (m_adminSettings.getDisplayMemOld()) {
                    result.append(dialogBlockStart(
                            key(Messages.GUI_SYSTEMINFORMATION_MEMORY_ADMIN_TOOL_BLOCK_) + name.toUpperCase()));
                    result.append(createWidgetTableStart());
                    result.append(createDialogRowsHtml(lineNumber, lineNumber + 2));
                    result.append(createWidgetTableEnd());
                    result.append(dialogBlockEnd());
                    lineNumber = lineNumber + 3;
                }
            } else if (name.toLowerCase().contains("eden")) {
                if (m_adminSettings.getDisplayMemEden()) {
                    result.append(dialogBlockStart(
                            key(Messages.GUI_SYSTEMINFORMATION_MEMORY_ADMIN_TOOL_BLOCK_) + name.toUpperCase()));
                    result.append(createWidgetTableStart());
                    result.append(createDialogRowsHtml(lineNumber, lineNumber + 2));
                    result.append(createWidgetTableEnd());
                    result.append(dialogBlockEnd());
                    lineNumber = lineNumber + 3;
                }
            } else if (name.toLowerCase().contains("survivor")) {
                LOG.debug("createDialogHtml() :: m_adminSettings.getDisplayMemSurvivor() = "
                        + m_adminSettings.getDisplayMemSurvivor());
                if (m_adminSettings.getDisplayMemSurvivor()) {
                    //if(CmsAdminSettings.getSettingsDisplayMemSurvivorValue(getCms(), getSession())){
                    result.append(dialogBlockStart(
                            key(Messages.GUI_SYSTEMINFORMATION_MEMORY_ADMIN_TOOL_BLOCK_) + name.toUpperCase()));
                    result.append(createWidgetTableStart());
                    result.append(createDialogRowsHtml(lineNumber, lineNumber + 2));
                    result.append(createWidgetTableEnd());
                    result.append(dialogBlockEnd());
                    lineNumber = lineNumber + 3;
                }
            }

        }
    }

    // close widget table
    result.append(createWidgetTableEnd());

    result.append("<script type='text/javascript' src='"
            + getJsp().link("/system/workplace/resources/jquery/packed/jquery.js") + "'></script>\n");
    result.append("<script type='text/javascript' src='"
            + getJsp().link("/system/workplace/resources/highcharts/highstock-1.3.0.js") + "'></script>\n");
    result.append("<script type='text/javascript' src='"
            + getJsp().link("/system/workplace/resources/highcharts/exporting-3.0.0.js") + "'></script>\n");
    result.append("<script type='text/javascript'>\n");
    result.append("$(function() {\n");
    result.append("  $('form#EDITOR').after('");
    result.append("<div class=\"customScripts\">");
    if (m_adminSettings.getDisplayMemPerm()) {
        result.append(
                "<div id=\"perm\" style=\"height: 300px; width: 50%; float: left;\">Loading Mem Perm graph...</div>");
    }
    if (m_adminSettings.getDisplayMemOld()) {
        result.append(
                "<div id=\"old\" style=\"height: 300px; width: 50%; float: left;\">Loading Mem Old graph...</div>");
    }
    if (m_adminSettings.getDisplayMemEden()) {
        result.append(
                "<div id=\"eden\" style=\"height: 300px; width: 50%; float: left;\">Loading Mem Eden graph...</div>");
    }
    if (m_adminSettings.getDisplayMemSurvivor()) {
        result.append(
                "<div id=\"survivor\" style=\"height: 300px; width: 50%; float: left;\">Loading Mem Survivor graph...</div>");
    }
    result.append("</div>");
    result.append("  ');\n");
    result.append("  Highcharts.setOptions({\n");
    result.append("    global : { useUTC : true }\n");
    result.append("  }); \n");
    result.append(getUpdateInfoFunction(m_adminSettings.getDisplayMemPerm(), m_adminSettings.getDisplayMemOld(),
            m_adminSettings.getDisplayMemEden(), m_adminSettings.getDisplayMemSurvivor()));
    if (m_adminSettings.getDisplayMemPerm()) {
        result.append(getHighChartPerm());
    }
    if (m_adminSettings.getDisplayMemOld()) {
        result.append(getHighChartOld());
    }
    if (m_adminSettings.getDisplayMemEden()) {
        result.append(getHighChartEden());
    }
    if (m_adminSettings.getDisplayMemSurvivor()) {
        result.append(getHighChartSurvivor());
    }
    result.append("});\n");
    result.append("</script>\n");

    return result.toString();
}

From source file:org.apache.hadoop.hive.llap.daemon.impl.LlapDaemon.java

public static long getTotalHeapSize() {
    // runtime.getMax() gives a very different number from the actual Xmx sizing.
    // you can iterate through the
    // http://docs.oracle.com/javase/7/docs/api/java/lang/management/MemoryPoolMXBean.html
    // from java.lang.management to figure this out, but the hard-coded params in the llap run.sh
    // result in 89% usable heap (-XX:NewRatio=8) + a survivor region which is technically not
    // in the usable space.

    long total = 0;
    for (MemoryPoolMXBean mp : ManagementFactory.getMemoryPoolMXBeans()) {
        long sz = mp.getUsage().getMax();
        if (mp.getName().contains("Survivor")) {
            sz *= 2; // there are 2 survivor spaces
        }/*from w  w  w  .  j  a  va2 s .  c o  m*/
        if (mp.getType().equals(MemoryType.HEAP)) {
            total += sz;
        }
    }
    // round up to the next MB
    total += (total % (1024 * 1024));
    return total;
}

From source file:org.apache.pig.impl.util.SpillableMemoryManager.java

private SpillableMemoryManager() {
    ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).addNotificationListener(this, null, null);
    List<MemoryPoolMXBean> mpbeans = ManagementFactory.getMemoryPoolMXBeans();
    long totalSize = 0;
    for (MemoryPoolMXBean pool : mpbeans) {
        log.debug("Found heap (" + pool.getName() + ") of type " + pool.getType());
        if (pool.getType() == MemoryType.HEAP) {
            long size = pool.getUsage().getMax();
            totalSize += size;/*from   w ww . j a v  a  2  s .co m*/
            // CMS Old Gen or "tenured" is the only heap that supports
            // setting usage threshold.
            if (pool.isUsageThresholdSupported()) {
                tenuredHeap = pool;
            }
        }
    }
    extraGCSpillSizeThreshold = (long) (totalSize * extraGCThresholdFraction);
    if (tenuredHeap == null) {
        throw new RuntimeException("Couldn't find heap");
    }

    configureMemoryThresholds(MEMORY_THRESHOLD_FRACTION_DEFAULT, COLLECTION_THRESHOLD_FRACTION_DEFAULT,
            UNUSED_MEMORY_THRESHOLD_DEFAULT);

}