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:Main.java

public static void main(String[] args) {

    // print the maximum memory

    Runtime runTime = Runtime.getRuntime();

    System.out.println(runTime.maxMemory());

}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    Runtime runTime = Runtime.getRuntime();

    long heapSize = runTime.totalMemory();

    long heapMaxSize = runTime.maxMemory();

    long heapFreeSize = runTime.freeMemory();

}

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From source file:org.apache.ranger.policyengine.RangerPolicyenginePerfTester.java

public static void main(String[] args) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("==> RangerPolicyenginePerfTester.main()");
    }//from w w w  .  ja v  a2s .co  m

    CommandLineParser commandLineParser = new CommandLineParser();

    PerfTestOptions perfTestOptions = commandLineParser.parse(args);

    if (perfTestOptions != null) {
        URL statCollectionFileURL = perfTestOptions.getStatCollectionFileURL();

        List<String> perfModuleNames = statCollectionFileURL != null
                ? buildPerfModuleNames(statCollectionFileURL)
                : new ArrayList<String>();

        PerfDataRecorder.initialize(perfModuleNames);

        URL servicePoliciesFileURL = perfTestOptions.getServicePoliciesFileURL();

        RangerPolicyEngineOptions policyEngineOptions = new RangerPolicyEngineOptions();
        policyEngineOptions.disableTagPolicyEvaluation = false;
        policyEngineOptions.evaluatorType = RangerPolicyEvaluator.EVALUATOR_TYPE_OPTIMIZED;
        policyEngineOptions.disableTrieLookupPrefilter = perfTestOptions.getIsTrieLookupPrefixDisabled();

        PerfTestEngine perfTestEngine = new PerfTestEngine(servicePoliciesFileURL, policyEngineOptions,
                perfTestOptions.getIsDynamicReorderingDisabled());
        if (!perfTestEngine.init()) {
            LOG.error("Error initializing test data. Existing...");
            System.exit(1);
        }

        URL[] requestFileURLs = perfTestOptions.getRequestFileURLs();
        int requestFilesCount = requestFileURLs.length;

        // warm-up policy engine
        LOG.error("Warming up..");
        try {
            for (URL requestFileURL : requestFileURLs) {
                PerfTestClient perfTestClient = new PerfTestClient(perfTestEngine, 0, requestFileURL, 1);

                if (perfTestClient.init()) {
                    perfTestClient.start();
                    perfTestClient.join();
                } else {
                    LOG.error("Error initializing warm-up PerfTestClient");
                }
            }
        } catch (Throwable t) {
            LOG.error("Error during warmup", t);
        }
        LOG.error("Warmed up!");

        PerfDataRecorder.clearStatistics();

        int clientsCount = perfTestOptions.getConcurrentClientCount();
        List<PerfTestClient> perfTestClients = new ArrayList<PerfTestClient>(clientsCount);

        for (int i = 0; i < clientsCount; i++) {

            URL requestFileURL = requestFileURLs[i % requestFilesCount];

            PerfTestClient perfTestClient = new PerfTestClient(perfTestEngine, i, requestFileURL,
                    perfTestOptions.getIterationsCount());

            if (!perfTestClient.init()) {
                LOG.error("Error initializing PerfTestClient: (id=" + i + ")");
            } else {
                perfTestClients.add(perfTestClient);
            }
        }

        if (LOG.isDebugEnabled()) {
            LOG.debug("Number of perfTestClients=" + perfTestClients.size());
        }

        Runtime runtime = Runtime.getRuntime();
        runtime.gc();

        long totalMemory = runtime.totalMemory();
        long freeMemory = runtime.freeMemory();

        LOG.info("Memory stats: max-available=:" + runtime.maxMemory() + "; in-use="
                + (totalMemory - freeMemory) + "; free=" + freeMemory);

        LOG.info("Starting " + perfTestClients.size() + " clients..");
        for (PerfTestClient client : perfTestClients) {
            try {
                client.start();
            } catch (Throwable t) {
                LOG.error("Error in starting client: " + client.getName(), t);
            }
        }
        LOG.info("Started " + perfTestClients.size() + " clients");

        LOG.info("Waiting for " + perfTestClients.size() + " clients to finish up");

        for (PerfTestClient client : perfTestClients) {
            while (client.isAlive()) {
                try {
                    client.join(1000);

                    runtime.gc();

                    totalMemory = runtime.totalMemory();
                    freeMemory = runtime.freeMemory();

                    LOG.info("Memory stats: max-available=:" + runtime.maxMemory() + "; in-use="
                            + (totalMemory - freeMemory) + "; free=" + freeMemory);

                } catch (InterruptedException interruptedException) {
                    LOG.error("PerfTestClient.join() was interrupted");
                }
            }
        }

        if (LOG.isDebugEnabled()) {
            LOG.debug("<== RangerPolicyenginePerfTester.main()");
        }

        LOG.info("Completed performance-run");

        perfTestEngine.cleanup();

        PerfDataRecorder.printStatistics();
    }

    LOG.info("Exiting...");

}

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From source file:org.apache.ranger.policyengine.RangerPluginPerfTester.java

public static void main(String[] args) {

    if (!parseArguments(args)) {
        System.err.println("Exiting.. ");
        System.exit(-1);//from   w  ww. ja  v a 2  s  . co  m
    }

    System.out.println("Arguments:");
    System.out.println("\t\tservice-type:\t\t\t" + serviceType);
    System.out.println("\t\tservice-name:\t\t\t" + serviceName);
    System.out.println("\t\tapp-id:\t\t\t\t" + appId);
    System.out.println("\t\tranger-host:\t\t\t" + rangerHostName);
    System.out.println("\t\tsocket-read-timeout:\t\t" + socketReadTimeout);
    System.out.println("\t\tpolling-interval:\t\t" + pollingInterval);
    System.out.println("\t\tpolicy-cache-dir:\t\t" + policyCacheDir);
    System.out.println("\t\tuse-cached-policy-evaluator:\t" + useCachedPolicyEvaluator);
    System.out.println("\n\n");

    Path filePath = buildConfigurationFile();

    if (filePath != null) {
        RangerConfiguration rangerConfig = RangerConfiguration.getInstance();
        rangerConfig.addResource(filePath);

        plugin = new RangerBasePlugin(serviceType, appId);

        Runtime runtime = Runtime.getRuntime();
        runtime.gc();

        long totalMemory = runtime.totalMemory();
        long freeMemory = runtime.freeMemory();

        System.out.println("Initial Memory Statistics:");
        System.out.println("\t\tMaximum Memory available for the process:\t" + runtime.maxMemory());
        System.out.println("\t\tInitial In-Use memory:\t\t\t\t" + (totalMemory - freeMemory));
        System.out.println("\t\tInitial Free memory:\t\t\t\t" + freeMemory);

        System.out.println("\n\n");

        plugin.init();

        while (true) {

            runtime.gc();

            freeMemory = runtime.freeMemory();
            totalMemory = runtime.totalMemory();

            System.out.println("Memory Statistics:");
            System.out.println("\t\tCurrently In-Use memory:\t" + (totalMemory - freeMemory));
            System.out.println("\t\tCurrently Free memory:\t\t" + freeMemory);

            System.out.println("\n\n");

            try {
                Thread.sleep(60 * 1000);
            } catch (InterruptedException e) {

                System.err.println("Main thread interrupted..., exiting...");
                break;
            }
        }
    } else {
        System.err.println("Failed to build configuration file");
    }
}

---

From source file:org.lenskit.cli.Main.java

public static void main(String[] args) {
    ArgumentParser parser = ArgumentParsers.newArgumentParser("lenskit")
            .description("Work with LensKit recommenders and data.");
    Logging.addLoggingGroup(parser);//ww w .  j  ava 2s  .  c  o  m

    Subparsers subparsers = parser.addSubparsers().metavar("COMMAND").title("commands");
    ServiceLoader<Command> loader = ServiceLoader.load(Command.class);
    for (Command cmd : loader) {
        Subparser cp = subparsers.addParser(cmd.getName()).help(cmd.getHelp()).setDefault("command", cmd);
        cmd.configureArguments(cp);
    }

    try {
        Namespace options = parser.parseArgs(args);
        Logging.configureLogging(options);
        Runtime rt = Runtime.getRuntime();
        logger.info("Starting LensKit {} on Java {} from {}", LenskitInfo.lenskitVersion(),
                SystemUtils.JAVA_VERSION, SystemUtils.JAVA_VENDOR);
        logger.debug("Built from Git revision {}", LenskitInfo.getHeadRevision());
        logger.debug("Using VM '{}' version {} from {}", SystemUtils.JAVA_VM_NAME, SystemUtils.JAVA_VM_VERSION,
                SystemUtils.JAVA_VM_VENDOR);
        logger.info("Have {} processors and heap limit of {} MiB", rt.availableProcessors(),
                rt.maxMemory() >> 20);
        Command cmd = options.get("command");
        cmd.execute(options);
        logger.info("If you use LensKit in published research, please see http://lenskit.org/research/");
    } catch (ArgumentParserException e) {
        parser.handleError(e);
        System.exit(1);
    } catch (Exception e) {
        logger.error("error running command: " + e, e);
        System.exit(2);
    }
}

---

From source file:com.aestel.chemistry.openEye.fp.Fingerprinter.java

public static void main(String... args) throws IOException {
    long start = System.currentTimeMillis();
    long iCounter = 0;

    // create command line Options object
    Options options = new Options();
    Option opt = new Option("in", true, "input file [.ism,.sdf,...]");
    opt.setRequired(true);//from   w  w  w.  j a va2  s  .  c o  m
    options.addOption(opt);

    opt = new Option("out", true, "output file .tsv or oe-supported");
    opt.setRequired(true);
    options.addOption(opt);

    opt = new Option("idTag", true, "field with ID (default title)");
    opt.setRequired(false);
    options.addOption(opt);

    opt = new Option("fpType", true, "fingerPrintType: maccs|linear7|linear7*4|HashLinear7*4\n"
            + "   maccs: generate maccs keys\n"
            + "   linear7 generate 7 bonds long linear fingerprints (210k known rest hashed)\n"
            + "   linear7*4 linear 7 bonds if more than 4 atoms code atoms as * (5.1k known rest hashed)\n"
            + "   HashLinear7*4: as linear7*4 but hashed to 16k");
    opt.setRequired(true);
    options.addOption(opt);

    opt = new Option("format", true,
            "folded512|folded2048|bitList|fragList|none\n" + "   folded512/2048: hex encoded 512/2048 bits\n"
                    + "   bitList: list of bitpositions\n" + "   none: no fp output for use with writeCodeMap");
    opt.setRequired(true);
    options.addOption(opt);

    opt = new Option("writeCodeMap", false, "Overwrite the codeMap file at the end of processing");
    opt.setRequired(false);
    options.addOption(opt);

    CommandLineParser parser = new PosixParser();
    CommandLine cmd = null;
    try {
        cmd = parser.parse(options, args);
    } catch (Exception e) {
        System.err.println(e.getMessage());
        exitWithHelp(options);
    }
    args = cmd.getArgs();

    if (cmd.hasOption("d")) {
        System.err.println("Start debugger and press return:");
        new BufferedReader(new InputStreamReader(System.in)).readLine();
    }

    String idTag = null;
    if (cmd.hasOption("idTag"))
        idTag = cmd.getOptionValue("idTag");

    String outformat = cmd.getOptionValue("format").toLowerCase().intern();
    if (args.length != 0) {
        exitWithHelp(options);
    }

    String type = cmd.getOptionValue("fpType");
    boolean updateDictionaryFile = cmd.hasOption("writeCodeMap");
    boolean hashUnknownFrag = true;
    if (type.equals("HashLinear7*4"))
        hashUnknownFrag = false;
    if (type.equals("maccs"))
        hashUnknownFrag = false;
    if (updateDictionaryFile)
        hashUnknownFrag = false;
    Fingerprinter fprinter = createFingerprinter(type, updateDictionaryFile, hashUnknownFrag);
    OEMolBase mol = new OEGraphMol();

    String inFile = cmd.getOptionValue("in");
    String outFile = cmd.getOptionValue("out");
    oemolistream ifs = new oemolistream(inFile);

    Runtime rt = Runtime.getRuntime();
    Outputter out;
    if (outFile.endsWith(".txt") || outFile.endsWith(".tab"))
        out = new TabOutputter(fprinter.getMapper(), outFile, outformat);
    else
        out = new OEOutputter(fprinter.getMapper(), outFile, type, outformat);

    while (oechem.OEReadMolecule(ifs, mol)) {
        iCounter++;
        Fingerprint fp = fprinter.getFingerprint(mol);

        String id;
        if (idTag == null)
            id = mol.GetTitle();
        else
            id = oechem.OEGetSDData(mol, idTag);

        if (iCounter % 100 == 0)
            System.err.print(".");
        if (iCounter % 4000 == 0) {
            System.err.printf(" %d %dsec\tt=%d f=%d u=%d m=%d tf=%d\n", iCounter,
                    (System.currentTimeMillis() - start) / 1000, rt.totalMemory() / 1024,
                    rt.freeMemory() / 1024, (rt.totalMemory() - rt.freeMemory()) / 1024, rt.maxMemory() / 1024,
                    (rt.freeMemory() + (rt.maxMemory() - rt.totalMemory())) / 1024);
        }

        out.output(id, mol, fp);
    }

    System.err.printf("Fingerprinter: Read %d structures in %d sec\n", iCounter,
            (System.currentTimeMillis() - start) / 1000);

    if (updateDictionaryFile)
        fprinter.writeDictionary();
    out.close();
    fprinter.close();
}

---

From source file:Main.java

/**
 * Determine the amount of available memory. "Available" memory is calculated as
 * <code>(max - total) + free</code>.
 *
 * @return the number of bytes of memory available according to the above algorithm.
 *///from   ww  w  .j  ava  2s  .  c  o  m
public static long availableMemory() {
    Runtime rt = Runtime.getRuntime();
    return rt.maxMemory() - rt.totalMemory() + rt.freeMemory();
}

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From source file:MemoryUtils.java

static double maxMemory(Runtime runtime) {
    long maxMemory = runtime.maxMemory();
    double memory = (double) maxMemory / (double) (1024 * 1024);
    return memory;
}

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From source file:org.codelibs.fess.util.MemoryUtil.java

public static String getMemoryUsageLog() {
    final Runtime runtime = Runtime.getRuntime();
    final long freeBytes = runtime.freeMemory();
    final long maxBytes = runtime.maxMemory();
    final long totalBytes = runtime.totalMemory();
    final long usedBytes = totalBytes - freeBytes;
    return "Mem:{used " + byteCountToDisplaySize(usedBytes) + ", heap " + byteCountToDisplaySize(totalBytes)
            + ", max " + byteCountToDisplaySize(maxBytes) + "}";
}

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From source file:osmcb.program.EnvironmentSetup.java

public static void checkMemory() {
    Runtime r = Runtime.getRuntime();
    long maxHeap = r.maxMemory();
    String heapMBFormatted = String.format(Locale.ENGLISH, "%3.2f MiB", maxHeap / 1048576d);
    log.info("Total available memory to OSMCB: " + heapMBFormatted);
    if (maxHeap < 200000000) {
        String msg = String.format(OSMCBStrs.RStr("msg_environment_lack_memory"), heapMBFormatted);
        JOptionPane.showMessageDialog(null, msg, OSMCBStrs.RStr("msg_environment_lack_memory_title"),
                JOptionPane.WARNING_MESSAGE);
    }//  w ww.  j ava2 s  .c om
}

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