Example usage for java.lang Runtime maxMemory

Introduction

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

Prototype

public native long maxMemory();

Source Link

Document

Returns the maximum amount of memory that the Java virtual machine will attempt to use.

Usage

From source file:com.viettel.logistic.wms.business.KpiLogBusiness.java

private void checkMemory(String functionName, String transactionCode) {

    //Getting the runtime reference from system
    Runtime runtime = Runtime.getRuntime();
    int mb = 1024 * 1024;

    System.out.println("##### Heap utilization statistics [MB] #####");
    System.out.println("##### Transaction code = " + transactionCode + " #####");

    //Print used memory
    System.out.println(functionName + " Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / mb);

    //Print free memory
    System.out.println(functionName + " Free Memory:" + runtime.freeMemory() / mb);

    //Print total available memory
    System.out.println(functionName + " Total Memory:" + runtime.totalMemory() / mb);

    //Print Maximum available memory
    System.out.println(functionName + " Max Memory:" + runtime.maxMemory() / mb);

}

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From source file:org.fcrepo.server.security.xacml.pdp.data.FedoraPolicyStore.java

@Override
public void init() throws PolicyStoreException, FileNotFoundException {
    if (log.isDebugEnabled()) {
        Runtime runtime = Runtime.getRuntime();
        log.debug("Total memory: " + runtime.totalMemory() / 1024);
        log.debug("Free memory: " + runtime.freeMemory() / 1024);
        log.debug("Max memory: " + runtime.maxMemory() / 1024);
    }// w ww  . j  a  va 2 s  . c om
    super.init();
    // if no pid namespace was specified, use the default specified in fedora.fcfg
    if (pidNamespace.equals("")) {
        pidNamespace = fedoraServer.getModule("org.fcrepo.server.storage.DOManager")
                .getParameter("pidNamespace");
    }

    // check control group was supplied
    if (datastreamControlGroup.equals("")) {
        throw new PolicyStoreException(
                "No control group for policy datastreams was specified in FedoraPolicyStore configuration");
    }
    if (validateSchema) {
        String schemaLocation = schemaLocations.get(XACML20_POLICY_NS);
        if (schemaLocation == null) {
            throw new PolicyStoreException("Configuration error - no policy schema specified");
        }
        try {
            String serverHome = fedoraServer.getHomeDir().getCanonicalPath() + File.separator;

            String schemaPath = ((schemaLocation).startsWith(File.separator) ? "" : serverHome)
                    + schemaLocation;
            FileInputStream in = new FileInputStream(schemaPath);
            PolicyParser policyParser = new PolicyParser(in);
            ValidationUtility.setFeslPolicyParser(policyParser);
        } catch (IOException ioe) {
            throw new PolicyStoreException(ioe.getMessage(), ioe);
        } catch (SAXException se) {
            throw new PolicyStoreException(se.getMessage(), se);
        }
    }
}

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From source file:at.beris.virtualfile.shell.Shell.java

private void displayStatistics() {
    Runtime runtime = Runtime.getRuntime();
    System.out.println("** Heap utilization statistics [KB] **");
    System.out//w w w . j a  v a  2  s  .c om
            .println(String.format("Used Memory: %,d", (runtime.totalMemory() - runtime.freeMemory()) / 1024));
    System.out.println(String.format("Free Memory: %,d", runtime.freeMemory() / 1024));
    System.out.println(String.format("Total Memory: %,d", runtime.totalMemory() / 1024));
    System.out.println(String.format("Max Memory: %,d", runtime.maxMemory() / 1024));
}

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From source file:org.janusgraph.diskstorage.Backend.java

/**
 * Initializes this backend with the given configuration. Must be called before this Backend can be used
 *
 * @param config/*  w  ww . j a  va  2 s. co  m*/
 */
public void initialize(Configuration config) {
    try {
        //EdgeStore & VertexIndexStore
        KeyColumnValueStore idStore = storeManager.openDatabase(ID_STORE_NAME);

        idAuthority = null;
        if (storeFeatures.isKeyConsistent()) {
            idAuthority = new ConsistentKeyIDAuthority(idStore, storeManager, config);
        } else {
            throw new IllegalStateException(
                    "Store needs to support consistent key or transactional operations for ID manager to guarantee proper id allocations");
        }

        KeyColumnValueStore edgeStoreRaw = storeManagerLocking.openDatabase(EDGESTORE_NAME);
        KeyColumnValueStore indexStoreRaw = storeManagerLocking.openDatabase(INDEXSTORE_NAME);

        //Configure caches
        if (cacheEnabled) {
            long expirationTime = configuration.get(DB_CACHE_TIME);
            Preconditions.checkArgument(expirationTime >= 0, "Invalid cache expiration time: %s",
                    expirationTime);
            if (expirationTime == 0)
                expirationTime = ETERNAL_CACHE_EXPIRATION;

            long cacheSizeBytes;
            double cachesize = configuration.get(DB_CACHE_SIZE);
            Preconditions.checkArgument(cachesize > 0.0, "Invalid cache size specified: %s", cachesize);
            if (cachesize < 1.0) {
                //Its a percentage
                Runtime runtime = Runtime.getRuntime();
                cacheSizeBytes = (long) ((runtime.maxMemory() - (runtime.totalMemory() - runtime.freeMemory()))
                        * cachesize);
            } else {
                Preconditions.checkArgument(cachesize > 1000, "Cache size is too small: %s", cachesize);
                cacheSizeBytes = (long) cachesize;
            }
            log.info("Configuring total store cache size: {}", cacheSizeBytes);
            long cleanWaitTime = configuration.get(DB_CACHE_CLEAN_WAIT);
            Preconditions.checkArgument(EDGESTORE_CACHE_PERCENT + INDEXSTORE_CACHE_PERCENT == 1.0,
                    "Cache percentages don't add up!");
            long edgeStoreCacheSize = Math.round(cacheSizeBytes * EDGESTORE_CACHE_PERCENT);
            long indexStoreCacheSize = Math.round(cacheSizeBytes * INDEXSTORE_CACHE_PERCENT);

            edgeStore = new ExpirationKCVSCache(edgeStoreRaw, getMetricsCacheName(EDGESTORE_NAME),
                    expirationTime, cleanWaitTime, edgeStoreCacheSize);
            indexStore = new ExpirationKCVSCache(indexStoreRaw, getMetricsCacheName(INDEXSTORE_NAME),
                    expirationTime, cleanWaitTime, indexStoreCacheSize);
        } else {
            edgeStore = new NoKCVSCache(edgeStoreRaw);
            indexStore = new NoKCVSCache(indexStoreRaw);
        }

        //Just open them so that they are cached
        txLogManager.openLog(SYSTEM_TX_LOG_NAME);
        mgmtLogManager.openLog(SYSTEM_MGMT_LOG_NAME);
        txLogStore = new NoKCVSCache(storeManager.openDatabase(SYSTEM_TX_LOG_NAME));

        //Open global configuration
        KeyColumnValueStore systemConfigStore = storeManagerLocking.openDatabase(SYSTEM_PROPERTIES_STORE_NAME);
        systemConfig = getGlobalConfiguration(new BackendOperation.TransactionalProvider() {
            @Override
            public StoreTransaction openTx() throws BackendException {
                return storeManagerLocking.beginTransaction(StandardBaseTransactionConfig
                        .of(configuration.get(TIMESTAMP_PROVIDER), storeFeatures.getKeyConsistentTxConfig()));
            }

            @Override
            public void close() throws BackendException {
                //Do nothing, storeManager is closed explicitly by Backend
            }
        }, systemConfigStore, configuration);
        userConfig = getConfiguration(new BackendOperation.TransactionalProvider() {
            @Override
            public StoreTransaction openTx() throws BackendException {
                return storeManagerLocking.beginTransaction(
                        StandardBaseTransactionConfig.of(configuration.get(TIMESTAMP_PROVIDER)));
            }

            @Override
            public void close() throws BackendException {
                //Do nothing, storeManager is closed explicitly by Backend
            }
        }, systemConfigStore, USER_CONFIGURATION_IDENTIFIER, configuration);

    } catch (BackendException e) {
        throw new JanusGraphException("Could not initialize backend", e);
    }
}

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From source file:com.ettrema.zsync.IntegrationTests.java

/**
 * Constructs an UploadMaker/UploadMakerEx, saves the Upload stream to a new File with
 * name uploadFileName, and returns that File.
 * //from   w w  w  .  j  av a 2 s .  co  m
 * @param localFile The local file to be uploaded
 * @param zsFile The zsync of the server file
 * @param uploadFileName The name of the File in which to save the upload stream
 * @return
 * @throws IOException
 */
private File makeAndSaveUpload(File localFile, File zsFile, String uploadFileName) throws IOException {
    System.out.println("------------- makeAndSaveUpload --------------------");

    System.gc();
    Runtime rt = Runtime.getRuntime();

    UploadMaker umx = new UploadMaker(localFile, zsFile);
    InputStream uploadIn = umx.makeUpload();

    File uploadFile = new File(uploadFileName);

    if (uploadFile.exists()) {
        if (!uploadFile.delete()) {
            throw new RuntimeException("Couldnt delete: " + uploadFile.getAbsolutePath());
        }
    }
    FileOutputStream uploadOut = new FileOutputStream(uploadFile);

    System.gc();
    System.out.println("Memory stats: " + formatBytes(rt.maxMemory()) + " - " + formatBytes(rt.totalMemory())
            + " - " + formatBytes(rt.freeMemory()));
    long endUsed = (rt.totalMemory() - rt.freeMemory());
    System.out.println("Start used memory: " + formatBytes(startUsed) + " end used memory: "
            + formatBytes(endUsed) + " - delta: " + formatBytes(endUsed - startUsed));
    System.out.println("");

    IOUtils.copy(uploadIn, uploadOut);
    uploadIn.close();
    uploadOut.close();

    System.out.println("Created upload of size: " + formatBytes(uploadFile.length()) + " from local file: "
            + formatBytes(localFile.length()));

    return uploadFile;

}

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From source file:edu.internet2.middleware.shibboleth.idp.StatusServlet.java

/**
 * Prints out information about the operating environment. This includes the operating system name, version and
 * architecture, the JDK version, available CPU cores, memory currently used by the JVM process, the maximum amount
 * of memory that may be used by the JVM, and the current time in UTC.
 * //from  w w w  . j av a  2 s .  c om
 * @param out output writer to which information will be written
 */
protected void printOperatingEnvironmentInformation(PrintWriter out) {
    Runtime runtime = Runtime.getRuntime();
    DateTime now = new DateTime(ISOChronology.getInstanceUTC());

    out.println("### Operating Environment Information");
    out.println("operating_system: " + System.getProperty("os.name"));
    out.println("operating_system_version: " + System.getProperty("os.version"));
    out.println("operating_system_architecture: " + System.getProperty("os.arch"));
    out.println("jdk_version: " + System.getProperty("java.version"));
    out.println("available_cores: " + runtime.availableProcessors());
    out.println("used_memory: " + runtime.totalMemory() / 1048576 + "MB");
    out.println("maximum_memory: " + runtime.maxMemory() / 1048576 + "MB");
    out.println("start_time: " + startTime.toString(dateFormat));
    out.println("current_time: " + now.toString(dateFormat));
    out.println("uptime: " + (now.getMillis() - startTime.getMillis()) + "ms");
}

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From source file:org.apache.hadoop.hdfs.server.namenode.Namenode2AgentServiceImpl.java

@Override
public Map getNamenodeInfo() {
    Map map = new HashMap<>();
    NameNode namenode = Namenode2Agent.namenode;
    Configuration configuration = Namenode2Agent.configuration;

    map.put("hostName", namenode.getAddress(configuration).getHostName());
    map.put("port", namenode.getAddress(configuration).getPort());

    // Block/*from  w  w  w .j  a  v a  2s  . co m*/
    map.put("blocksTotal", namenode.getNamesystem().getBlocksTotal());
    map.put("corruptReplicatedBlocks", namenode.getNamesystem().getCorruptReplicaBlocks());
    map.put("pendingReplicationBlocks", namenode.getNamesystem().getPendingReplicationBlocks());
    map.put("scheduledReplicationBlocks", namenode.getNamesystem().getScheduledReplicationBlocks());
    map.put("underReplicatedBlocks", namenode.getNamesystem().getUnderReplicatedBlocks());
    map.put("missingBlocks", namenode.getNamesystem().getNumberOfMissingBlocks());
    map.put("blockCapacity", namenode.getNamesystem().getBlockCapacity());

    // Node Status
    map.put("all", namenode.getNamesystem().getNumberOfDatanodes(HdfsConstants.DatanodeReportType.ALL));
    map.put("dead", namenode.getNamesystem().getNumberOfDatanodes(HdfsConstants.DatanodeReportType.DEAD));
    map.put("live", namenode.getNamesystem().getNumberOfDatanodes(HdfsConstants.DatanodeReportType.LIVE));
    map.put("decommissioning",
            namenode.getNamesystem().getNumberOfDatanodes(HdfsConstants.DatanodeReportType.DECOMMISSIONING));
    map.put("stale", namenode.getNamesystem().getNumStaleDataNodes());

    // FSNamesystem
    //map.put("defaultBlockSize", namenode.getNamesystem().getDefaultBlockSize());
    map.put("defaultBlockSize", configuration.get("dfs.blocksize"));
    map.put("totalFiles", namenode.getNamesystem().getTotalFiles());
    map.put("totalBlocks", namenode.getNamesystem().getTotalBlocks());
    map.put("totalLoad", namenode.getNamesystem().getTotalLoad());

    // DFS Capacity
    map.put("capacityRemaining", namenode.getNamesystem().getCapacityRemainingGB());
    map.put("capacityRemainingPercent", Math.round(100 / namenode.getNamesystem().getCapacityTotal()
            * namenode.getNamesystem().getCapacityRemaining()));
    map.put("capacityTotal", namenode.getNamesystem().getCapacityTotalGB());
    map.put("capacityUsed", namenode.getNamesystem().getCapacityUsedGB());
    map.put("capacityUsedNonDFS", namenode.getNamesystem().getCapacityUsedNonDFS());
    map.put("capacityUsedPercent", Math.round(100 / namenode.getNamesystem().getCapacityTotal()
            * namenode.getNamesystem().getCapacityUsedNonDFS()));

    // DFS Usage
    map.put("free", namenode.getNamesystem().getFree());
    map.put("used", namenode.getNamesystem().getUsed());
    map.put("total", namenode.getNamesystem().getTotal());
    map.put("threads", namenode.getNamesystem().getThreads());
    map.put("startTime", namenode.getNamesystem().getStartTime());

    // JVM Heap Size
    final Runtime rt = Runtime.getRuntime();
    final long totalMemory = rt.totalMemory() / MEGA_BYTES;
    final long freeMemory = rt.freeMemory() / MEGA_BYTES;
    map.put("jvmMaxMemory", rt.maxMemory() / MEGA_BYTES);
    map.put("jvmTotalMemory", rt.totalMemory() / MEGA_BYTES);
    map.put("jvmFreeMemory", rt.freeMemory() / MEGA_BYTES);
    map.put("jvmUsedMemory", totalMemory - freeMemory);
    return map;
}

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From source file:org.LexGrid.LexBIG.distributed.test.testUtility.PerformanceTest.java

public void printMemoryStatistics() {

    int mb = 1024 * 1024;

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

    System.out.println("##### Heap utilization statistics [MB] #####");

    //Print used memory
    System.out.println("Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / mb);

    //Print free memory
    System.out.println("Free Memory:" + runtime.freeMemory() / mb);

    //Print total available memory
    System.out.println("Total Memory:" + runtime.totalMemory() / mb);

    //Print Maximum available memory
    System.out.println("Max Memory:" + runtime.maxMemory() / mb);
}

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From source file:edu.upenn.ircs.lignos.morsel.MorphLearner.java

private String memoryStatus() {
    // Check the memory
    Runtime runtime = Runtime.getRuntime();
    long usage = runtime.totalMemory() - runtime.freeMemory();
    long remaining = runtime.maxMemory() - usage;

    // Conver to megabytes
    usage /= 1048576L;//  w w  w .j  a  v a2 s.c  o m
    remaining /= 1048576L;

    return "Memory status: " + usage + "MB Used, " + remaining + "MB Remaining";
}

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From source file:org.mrgeo.resources.wms.WmsGenerator.java

private Response handleRequest(@Context UriInfo uriInfo) {
    long start = System.currentTimeMillis();
    try {/*from   ww  w .  ja  va 2 s. com*/
        MultivaluedMap<String, String> allParams = uriInfo.getQueryParameters();
        String request = getQueryParam(allParams, "request", "GetCapabilities");
        ProviderProperties providerProperties = SecurityUtils.getProviderProperties();

        String serviceName = getQueryParam(allParams, "service");
        if (serviceName == null) {
            return writeError(Response.Status.BAD_REQUEST,
                    "Missing required SERVICE parameter. Should be set to \"WMS\"");
        }
        if (!serviceName.equalsIgnoreCase("wms")) {
            return writeError(Response.Status.BAD_REQUEST,
                    "Invalid SERVICE parameter. Should be set to \"WMS\"");
        }

        if (request.equalsIgnoreCase("getmap")) {
            return getMap(allParams, providerProperties);
        } else if (request.equalsIgnoreCase("getmosaic")) {
            return getMosaic(allParams, providerProperties);
        } else if (request.equalsIgnoreCase("gettile")) {
            return getTile(allParams, providerProperties);
        } else if (request.equalsIgnoreCase("getcapabilities")) {
            return getCapabilities(uriInfo, allParams, providerProperties);
        } else if (request.equalsIgnoreCase("describetiles")) {
            return describeTiles(uriInfo, allParams, providerProperties);
        }
        return writeError(Response.Status.BAD_REQUEST, "Invalid request");
    } finally {
        if (log.isDebugEnabled()) {
            log.debug("WMS request time: {}ms", (System.currentTimeMillis() - start));
            // this can be resource intensive.
            System.gc();
            final Runtime rt = Runtime.getRuntime();
            log.debug(String.format("WMS request memory: %.1fMB / %.1fMB\n",
                    (rt.totalMemory() - rt.freeMemory()) / 1e6, rt.maxMemory() / 1e6));
        }
    }
}

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