Example usage for java.lang Runtime freeMemory

List of usage examples for java.lang Runtime freeMemory

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Introduction

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

Prototype

public native long freeMemory();

Source Link

Document

Returns the amount of free memory in the Java Virtual Machine.

Usage

From source file:qa.qcri.nadeef.test.core.SQLTableTest.java

public void testSize() throws InterruptedException {
    Stopwatch stopwatch = Stopwatch.createStarted();
    SQLTable table = new SQLTable("TB_test60m", connectionFactory);
    table.get(0);//from   w w  w. j av  a  2 s . co  m

    long elapsedTime = stopwatch.elapsed(TimeUnit.MILLISECONDS);
    int mb = 1024 * 1024;

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

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

    long usedMemory = (runtime.totalMemory() - runtime.freeMemory()) / mb;
    System.out.println("Used Memory:" + usedMemory);
    System.out.println("Free Memory:" + runtime.freeMemory() / mb);
    System.out.println("Total Memory:" + runtime.totalMemory() / mb);
    System.out.println("Max Memory:" + runtime.maxMemory() / mb);
    System.out.println("Load time: " + elapsedTime + " ms.");

    // memory usage should be less than 700 mb.
    Assert.assertTrue(usedMemory < 700);

    // load time should be less than 18000 ms
    Assert.assertTrue(elapsedTime < 18000);
}

From source file:ai.susi.server.api.susi.StatusService.java

@Override
public JSONObject serviceImpl(Query post, HttpServletResponse response, Authorization rights,
        JsonObjectWithDefault permissions) throws APIException {

    post.setResponse(response, "application/javascript");

    // generate json
    Runtime runtime = Runtime.getRuntime();
    JSONObject json = new JSONObject(true);
    JSONObject system = new JSONObject(true);
    system.put("assigned_memory", runtime.maxMemory());
    system.put("used_memory", runtime.totalMemory() - runtime.freeMemory());
    system.put("available_memory", runtime.maxMemory() - runtime.totalMemory() + runtime.freeMemory());
    system.put("cores", runtime.availableProcessors());
    system.put("threads", Thread.activeCount());
    system.put("runtime", System.currentTimeMillis() - Caretaker.startupTime);
    system.put("load_system_average", OS.getSystemLoadAverage());
    system.put("load_system_cpu", OS.getSystemCpuLoad());
    system.put("load_process_cpu", OS.getProcessCpuLoad());
    system.put("server_threads", SusiServer.getServerThreads());
    system.put("server_uri", SusiServer.getServerURI());

    JSONObject index = new JSONObject(true);
    JSONObject messages = new JSONObject(true);
    JSONObject queue = new JSONObject(true);
    messages.put("queue", queue);
    JSONObject users = new JSONObject(true);
    JSONObject queries = new JSONObject(true);
    JSONObject accounts = new JSONObject(true);
    JSONObject user = new JSONObject(true);
    index.put("messages", messages);
    index.put("users", users);
    index.put("queries", queries);
    index.put("accounts", accounts);
    index.put("user", user);

    JSONObject client_info = new JSONObject(true);
    client_info.put("RemoteHost", post.getClientHost());
    client_info.put("IsLocalhost", post.isLocalhostAccess() ? "true" : "false");

    JSONObject request_header = new JSONObject(true);
    Enumeration<String> he = post.getRequest().getHeaderNames();
    while (he.hasMoreElements()) {
        String h = he.nextElement();
        request_header.put(h, post.getRequest().getHeader(h));
    }//from  w w w .j a  v a 2s.  c  o  m
    client_info.put("request_header", request_header);

    json.put("system", system);
    json.put("index", index);
    json.put("client_info", client_info);

    return json;
}

From source file:com.openddal.test.BaseTestCase.java

/**
 * Get the number of bytes heap memory in use.
 *
 * @return the used bytes//from w  ww . j ava 2  s.  co m
 */
public static long getMemoryUsedBytes() {
    Runtime rt = Runtime.getRuntime();
    long memory = Long.MAX_VALUE;
    for (int i = 0; i < 8; i++) {
        rt.gc();
        long memNow = rt.totalMemory() - rt.freeMemory();
        if (memNow >= memory) {
            break;
        }
        memory = memNow;
    }
    return memory;
}

From source file:tachyon.master.InodeFolderTest.java

@Test
public void getChildTest() {
    // large number of small files
    InodeFolder inodeFolder = new InodeFolder("testFolder1", 1, 0, System.currentTimeMillis());
    int nFiles = (int) 1E5;
    Inode[] inodes = new Inode[nFiles];
    for (int i = 0; i < nFiles; i++) {
        inodes[i] = new InodeFile(String.format("testFile%d", i + 1), i + 2, 1, 1, System.currentTimeMillis());
        inodeFolder.addChild(inodes[i]);
    }/*  w w  w  .  j  av  a2s.  co m*/

    Runtime runtime = Runtime.getRuntime();
    System.out.println(String.format("Used Memory = %dB when number of files = %d",
            runtime.totalMemory() - runtime.freeMemory(), nFiles));

    long start = System.currentTimeMillis();
    for (int i = 0; i < nFiles; i++) {
        Assert.assertEquals(inodes[i], inodeFolder.getChild(i + 2));
    }
    System.out.println(String.format("getChild(int fid) called sequentially %d times, cost %d ms", nFiles,
            System.currentTimeMillis() - start));

    start = System.currentTimeMillis();
    for (int i = 0; i < nFiles; i++) {
        Assert.assertEquals(inodes[i], inodeFolder.getChild(String.format("testFile%d", i + 1)));
    }
    System.out.println(String.format("getChild(String name) called sequentially %d times, cost %d ms", nFiles,
            System.currentTimeMillis() - start));
}

From source file:org.apache.shindig.social.opensocial.util.JsonConverterPerformancePerf.java

public void testToJsonOnInheritedClassOutput() throws Exception {
    SpecialPerson[] spa = new SpecialPerson[TEST_SIZE];
    for (int i = 0; i < TEST_SIZE; i++) {
        spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense");
    }/*from ww  w  . ja  v a  2s  .  c o  m*/
    Runtime r = Runtime.getRuntime();
    String[] output = new String[TEST_SIZE];
    r.gc();
    long memstart = r.totalMemory() - r.freeMemory();
    long startOutput = System.currentTimeMillis();
    for (int i = 0; i < TEST_SIZE; i++) {
        output[i] = ((JSONObject) beanJsonConverter.convertToJson(spa[i])).toString();
    }
    long endOutput = System.currentTimeMillis();
    long memend = r.totalMemory() - r.freeMemory();
    String[] serializeOutput = new String[TEST_SIZE];
    char[] source = output[0].toCharArray();
    r.gc();

    long stringsizeStart = r.totalMemory() - r.freeMemory();

    for (int i = 0; i < TEST_SIZE; i++) {
        serializeOutput[i] = new String(source);
    }
    long stringsizeEnd = r.totalMemory() - r.freeMemory();

    log.info("ORG JSON Lib Output " + average(startOutput, endOutput, TEST_SIZE) + " ms/conversion, "
            + (average(memstart, memend, TEST_SIZE) - average(stringsizeStart, stringsizeEnd, TEST_SIZE))
            + " heap bytes/conversion, output packet consumed on average "
            + average(stringsizeStart, stringsizeEnd, TEST_SIZE) + " for a string length of "
            + output[0].length());
    log.info("Output Was [" + output[0] + ']');
}

From source file:org.sakaiproject.assignment.impl.AssignmentServiceTest.java

/**
 * /*from  w  ww.  jav a2  s.  c om*/
 * test the zip routine without/with flushing for 5 times
 *
 */
public void testZipSubmissionsWithoutFlushing() {
    if (testZipFunction) {
        System.out.println("student number = " + userNumber);
        System.out.println("attachment size = " + attachmentSize + "KB");
        System.gc();

        for (int index = 1; index <= testNumber; index++) {
            Random ran = new Random();
            boolean flushing = ran.nextBoolean();

            Runtime r = Runtime.getRuntime();
            System.out.println("with flushing = " + flushing);
            long mBefore = r.freeMemory();
            long tBefore = System.currentTimeMillis();

            zipWithFlushing(flushing);
            long mAfter = r.freeMemory();
            long tAfter = System.currentTimeMillis();
            System.out.println("free memory before invoke " + mBefore + " after " + mAfter);
            System.out.println("minute time used " + (tAfter - tBefore) / (1000.0 * 60.0));
            System.out.println("percent  " + (mBefore - mAfter) * 100 / (mBefore * 1.0));
            System.out.println("*************");
            // gc
            System.gc();
        }
    }
}

From source file:alluxio.util.JvmPauseMonitor.java

private String getMemoryInfo() {
    Runtime runtime = Runtime.getRuntime();
    return "max memory = " + runtime.maxMemory() / (1024 * 1024) + "M total memory = "
            + runtime.totalMemory() / (1024 * 1024) + "M free memory = " + runtime.freeMemory() / (1024 * 1024)
            + "M";
}

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

/**
 * Creates the zsync File for servercopy, and saves it to a File with name fileName
 * @param fileName The name of the file in which to save the zsync data
 * @param blocksize The block size to use in MetaFileMaker
 * @return The created zsync File/*from ww w . jav  a  2s . c om*/
 * @throws FileNotFoundException
 */
private File createMetaFile(String fileName, int blocksize, File serverFile) throws FileNotFoundException {
    System.out.println("---------------- createMetaFile -------------------");

    System.gc();
    Runtime rt = Runtime.getRuntime();
    startUsed = rt.totalMemory() - rt.freeMemory();

    MetaFileMaker mkr = new MetaFileMaker();
    File zsfile = mkr.make(null, blocksize, serverFile);
    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));

    File dest = new File(filepath + fileName);
    if (dest.exists()) {
        if (!dest.delete()) {
            throw new RuntimeException("Failed to delete previous meta file: " + dest.getAbsolutePath());
        }
    }
    System.out.println("rename meta file to: " + dest.getAbsolutePath());
    if (!zsfile.renameTo(dest)) {
        throw new RuntimeException("Failed to rename to: " + dest.getAbsolutePath());
    }
    System.out.println("Created meta file of size: " + formatBytes(dest.length())
            + " from source file of size: " + formatBytes(serverFile.length()));
    System.out.println("");
    return dest;
}

From source file:org.openflamingo.web.util.VersionConfigurer.java

@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
    Log4jWebConfigurer.initLogging(servletContextEvent.getServletContext());

    Properties properties = new Properties();
    ServletContext context = servletContextEvent.getServletContext();
    InputStream inputStream = null;
    try {// w  w w .  j  a  va 2 s .co m
        inputStream = context.getResourceAsStream("/WEB-INF/version.properties");
        properties.load(inputStream);
    } catch (Exception ex) {
        throw new IllegalArgumentException("Cannot load a '/WEB/INF/version.properties' file.", ex);
    } finally {
        IOUtils.closeQuietly(inputStream);
    }

    StringBuilder builder = new StringBuilder();

    printHeader(builder, "Application Information");
    Properties appProps = new Properties();
    appProps.put("Application", "Flamingo Workflow Engine");
    appProps.put("Version", properties.get("version"));
    appProps.put("Build Date", properties.get("build.timestamp"));
    appProps.put("Build Number", properties.get("build.number"));
    appProps.put("Revision Number", properties.get("revision.number"));
    appProps.put("Build Key", properties.get("build.key"));

    if (context != null) {
        appProps.put("Application Server", context.getServerInfo() + " - Servlet API "
                + context.getMajorVersion() + "." + context.getMinorVersion());
    }

    Properties systemProperties = System.getProperties();
    appProps.put("Java Version", systemProperties.getProperty("java.version", UNKNOWN) + " - "
            + systemProperties.getProperty("java.vendor", UNKNOWN));
    appProps.put("Current Working Directory", systemProperties.getProperty("user.dir", UNKNOWN));

    print(builder, appProps);

    Properties memPros = new Properties();
    final Runtime rt = Runtime.getRuntime();
    final long maxMemory = rt.maxMemory() / MEGA_BYTES;
    final long totalMemory = rt.totalMemory() / MEGA_BYTES;
    final long freeMemory = rt.freeMemory() / MEGA_BYTES;
    final long usedMemory = totalMemory - freeMemory;

    memPros.put("Maximum Allowable Memory", maxMemory + "MB");
    memPros.put("Total Memory", totalMemory + "MB");
    memPros.put("Free Memory", freeMemory + "MB");
    memPros.put("Used Memory", usedMemory + "MB");

    print(builder, memPros);

    printHeader(builder, "Java System Properties");
    Properties sysProps = new Properties();
    for (final Map.Entry<Object, Object> entry : systemProperties.entrySet()) {
        sysProps.put(entry.getKey(), entry.getValue());
    }

    print(builder, sysProps);

    printHeader(builder, "System Environments");
    Map<String, String> getenv = System.getenv();
    Properties envProps = new Properties();
    Set<String> strings = getenv.keySet();
    for (String key : strings) {
        String message = getenv.get(key);
        envProps.put(key, message);
    }

    print(builder, envProps);

    logger.info("=================================================");
    logger.info(" Flamingo Web Services starting...");
    logger.info("=================================================\n{}", builder.toString());
}

From source file:edu.ku.brc.ui.FeedBackSender.java

/**
 * Creates an array of POST method parameters to send with the version checking / usage tracking connection.
 * /*w w w.ja v  a 2s  .  c o  m*/
 * @param item the item to fill
 * @return an array of POST parameters
 */
protected NameValuePair[] createPostParameters(final FeedBackSenderItem item) {
    Vector<NameValuePair> postParams = new Vector<NameValuePair>();
    try {
        postParams.add(new NameValuePair("bug", item.getBug())); //$NON-NLS-1$
        postParams.add(new NameValuePair("class_name", item.getClassName())); //$NON-NLS-1$
        postParams.add(new NameValuePair("comments", item.getComments())); //$NON-NLS-1$
        postParams.add(new NameValuePair("stack_trace", item.getStackTrace())); //$NON-NLS-1$
        postParams.add(new NameValuePair("task_name", item.getTaskName())); //$NON-NLS-1$
        postParams.add(new NameValuePair("title", item.getTitle())); //$NON-NLS-1$

        // get the install ID
        String installID = UsageTracker.getInstallId();
        postParams.add(new NameValuePair("id", installID)); //$NON-NLS-1$

        Runtime runtime = Runtime.getRuntime();
        Long usedMemory = runtime.maxMemory() - (runtime.totalMemory() + runtime.freeMemory());
        Long maxMemory = runtime.maxMemory();

        // get the OS name and version
        postParams.add(new NameValuePair("os_name", System.getProperty("os.name"))); //$NON-NLS-1$ //$NON-NLS-2$
        postParams.add(new NameValuePair("os_version", System.getProperty("os.version"))); //$NON-NLS-1$ //$NON-NLS-2$
        postParams.add(new NameValuePair("java_version", System.getProperty("java.version"))); //$NON-NLS-1$ //$NON-NLS-2$
        postParams.add(new NameValuePair("java_vendor", System.getProperty("java.vendor"))); //$NON-NLS-1$ //$NON-NLS-2$
        postParams.add(new NameValuePair("max_memory", maxMemory.toString())); //$NON-NLS-1$
        postParams.add(new NameValuePair("used_memory", usedMemory.toString())); //$NON-NLS-1$

        Properties props = item.getProps();
        if (props != null) {
            for (Object key : props.keySet()) {
                postParams.add(new NameValuePair(key.toString(), props.getProperty(key.toString()))); //$NON-NLS-1$
            }
        }

        //if (!UIRegistry.isRelease()) // For Testing Only
        {
            postParams.add(new NameValuePair("user_name", System.getProperty("user.name"))); //$NON-NLS-1$
            try {
                postParams.add(new NameValuePair("ip", InetAddress.getLocalHost().getHostAddress())); //$NON-NLS-1$
            } catch (UnknownHostException e) {
            }
        }

        String resAppVersion = UIRegistry.getAppVersion();
        if (StringUtils.isEmpty(resAppVersion)) {
            resAppVersion = "Unknown";
        }
        postParams.add(new NameValuePair("app_version", resAppVersion)); //$NON-NLS-1$

        Vector<NameValuePair> extraStats = collectionSecondaryInfo(item);
        if (extraStats != null) {
            postParams.addAll(extraStats);
        }

        // create an array from the params
        NameValuePair[] paramArray = new NameValuePair[postParams.size()];
        for (int i = 0; i < paramArray.length; ++i) {
            paramArray[i] = postParams.get(i);
        }

        return paramArray;

    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}