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:xc.mst.repo.RepositoryDAO.java

private double getMemUsage() {
    Runtime r = Runtime.getRuntime();
    long maxMem = r.maxMemory() / 1048576;
    long totalMem = r.totalMemory() / 1048576;

    long freeBytes = r.freeMemory();
    long freeMem = freeBytes / 1048576;

    long usedMem = totalMem - freeMem;
    double percentageUsed = ((double) usedMem) / maxMem;

    LOG.debug("");
    LOG.debug("Free  memory: " + StringUtils.leftPad(freeMem + "", 7) + " MB.");
    LOG.debug("Used  memory: " + StringUtils.leftPad(usedMem + "", 7) + " MB.");
    LOG.debug("Total memory: " + StringUtils.leftPad(totalMem + "", 7) + " MB.");
    LOG.debug("Max'm memory: " + StringUtils.leftPad(maxMem + "", 7) + " MB.");
    LOG.debug("memory percentageUsed: " + StringUtils.leftPad(Double.toString(percentageUsed), 7));

    return percentageUsed;
}

From source file:org.unitime.timetable.onlinesectioning.server.AbstractServer.java

@Override
public long getMemUsage() {
    Runtime rt = Runtime.getRuntime();
    MemoryCounter mc = new MemoryCounter();
    DecimalFormat df = new DecimalFormat("#,##0.00");
    long total = 0; // mc.estimate(this);
    Map<String, String> info = new HashMap<String, String>();
    Class clazz = getClass();/*from  w  ww  .j  a va2 s.  c o m*/
    while (clazz != null) {
        Field[] fields = clazz.getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            if (!Modifier.isStatic(fields[i].getModifiers())) {
                if (!fields[i].getType().isPrimitive()) {
                    fields[i].setAccessible(true);
                    try {
                        Object obj = fields[i].get(this);
                        if (obj != null) {
                            long est = estimate(mc, obj);
                            if (est > 1024)
                                info.put(clazz.getSimpleName() + "." + fields[i].getName(),
                                        df.format(est / 1024.0) + " kB"
                                                + (obj instanceof Map ? " (" + ((Map) obj).size() + " records)"
                                                        : obj instanceof Collection
                                                                ? "(" + ((Collection) obj).size() + " records)"
                                                                : ""));
                            total += est;
                        }
                    } catch (IllegalAccessException ex) {
                    } catch (ConcurrentModificationException ex) {
                    }
                }
            }
        }
        clazz = clazz.getSuperclass();
    }
    iLog.info("Total Allocated " + df.format(total / 1024.0) + " kB (of "
            + df.format((rt.totalMemory() - rt.freeMemory()) / 1048576.0) + " MB), details: "
            + ToolBox.dict2string(info, 2));
    return total;
}

From source file:cn.nukkit.Server.java

public void titleTick() {
    if (true || !Nukkit.ANSI) {
        return;//  ww w  .j a v a 2  s.  c  om
    }

    Runtime runtime = Runtime.getRuntime();
    double used = NukkitMath.round((double) (runtime.totalMemory() - runtime.freeMemory()) / 1024 / 1024, 2);
    double max = NukkitMath.round(((double) runtime.maxMemory()) / 1024 / 1024, 2);
    String usage = Math.round(used / max * 100) + "%";
    String title = (char) 0x1b + "]0;" + this.getName() + " " + this.getNukkitVersion() + " | Online "
            + this.players.size() + "/" + this.getMaxPlayers() + " | Memory " + usage;
    if (!Nukkit.shortTitle) {
        title += " | U " + NukkitMath.round((this.network.getUpload() / 1024 * 1000), 2) + " D "
                + NukkitMath.round((this.network.getDownload() / 1024 * 1000), 2) + " kB/s";
    }
    title += " | TPS " + this.getTicksPerSecond() + " | Load " + this.getTickUsage() + "%" + (char) 0x07;

    System.out.print(title);

    this.network.resetStatistics();
}

From source file:axiom.framework.core.Application.java

/**
 * Periodically called to log thread stats for this application
 *//*from   www.j  a v  a  2 s  . c  o  m*/
public void printThreadStats() {
    logEvent("Thread Stats for " + name + ": " + threadgroup.activeCount() + " active");

    Runtime rt = Runtime.getRuntime();
    long free = rt.freeMemory();
    long total = rt.totalMemory();

    logEvent("Free memory: " + (free / 1024) + " kB");
    logEvent("Total memory: " + (total / 1024) + " kB");
}

From source file:com.fanniemae.ezpie.LogManager.java

protected void initializeLog() {
    // Read JVM runtime settings
    Runtime runtime = Runtime.getRuntime();
    // Read the debug template
    String template = (_logFormat == LogFormat.HTML) ? readTemplateFile(_templatePath + "Debug.txt") : "";
    _startTime = System.currentTimeMillis();
    // Create debug file
    try (FileOutputStream fos = new FileOutputStream(_logFilename, false)) {
        fos.write(template.getBytes());/*w  w w . j  av  a  2s . c  o  m*/
        // Add machine information
        fos.write(String
                .format(_basicLine, "Environment Information", "Started",
                        new SimpleDateFormat("MMMM d, yyyy HH:mm:ss").format(new Date()), elapsedTime())
                .getBytes());
        fos.write(String.format(_basicLine, groupString(""), "User account name",
                System.getProperty("user.name"), elapsedTime()).getBytes());
        fos.write(String.format(_basicLine, groupString(""), "Machine Name",
                InetAddress.getLocalHost().getHostName(), elapsedTime()).getBytes());
        fos.write(String.format(_basicLine, groupString(""), "JAVA Version", System.getProperty("java.version"),
                elapsedTime()).getBytes());
        fos.write(String.format(_basicLine, groupString(""), "JAVA Architecture",
                System.getProperty("sun.arch.data.model") + " bit", elapsedTime()).getBytes());
        fos.write(String.format(_basicLine, groupString(""), "JAVA Home", System.getProperty("java.home"),
                elapsedTime()).getBytes());
        fos.write(String.format(_basicLine, groupString(""), "JAVA Vendor", System.getProperty("java.vendor"),
                elapsedTime()).getBytes());
        fos.write(String
                .format(_longTextLine, groupString(""), "JAVA Class Path",
                        System.getProperty("java.class.path").replace(";", ";" + _newLineTab), elapsedTime())
                .getBytes());
        fos.write(String
                .format(_basicLine, groupString(""), "JVM Maximum Memory",
                        String.format("%,d Megabytes", runtime.maxMemory() / 1048576), elapsedTime())
                .getBytes());
        fos.write(String
                .format(_basicLine, groupString(""), "JVM Total Allocated Memory",
                        String.format("%,d Megabytes reserved", runtime.totalMemory() / 1048576), elapsedTime())
                .getBytes());
        fos.write(String
                .format(_basicLine, groupString(""), "JVM Used Memory",
                        String.format("%,d Megabytes",
                                (runtime.totalMemory() - runtime.freeMemory()) / 1048576),
                        elapsedTime())
                .getBytes());
        fos.write(String
                .format(_basicLine, groupString(""), "JVM Free Memory",
                        String.format("%,d Megabytes", runtime.freeMemory() / 1048576), elapsedTime())
                .getBytes());
        fos.write(String.format(_basicLine, groupString(""), "Operating system name",
                System.getProperty("os.name"), elapsedTime()).getBytes());
        fos.write(String.format(_basicLine, groupString(""), "User working directory",
                System.getProperty("user.dir"), elapsedTime()).getBytes());
        fos.write(_footerByteArray);
        fos.close();
    } catch (IOException e) {
        throw new PieException(String.format("Error trying to create log file. %s", _logFilename), e);
    }
}

From source file:mondrian.olap.Util.java

public static String printMemory(String msg) {
    final Runtime rt = Runtime.getRuntime();
    final long freeMemory = rt.freeMemory();
    final long totalMemory = rt.totalMemory();
    final StringBuilder buf = new StringBuilder(64);

    buf.append("FREE_MEMORY:");
    if (msg != null) {
        buf.append(msg);//from   w  w  w  .  j  a  v  a 2s.c om
        buf.append(':');
    }
    buf.append(' ');
    buf.append(freeMemory / 1024);
    buf.append("kb ");

    long hundredths = (freeMemory * 10000) / totalMemory;

    buf.append(hundredths / 100);
    hundredths %= 100;
    if (hundredths >= 10) {
        buf.append('.');
    } else {
        buf.append(".0");
    }
    buf.append(hundredths);
    buf.append('%');

    return buf.toString();
}

From source file:org.wyona.yanel.servlet.YanelServlet.java

/**
 * Get currently used memory//from  w w w  .ja  v a2s  . c om
 */
private long getUsedMemory(Runtime rt) {
    return (rt.totalMemory() - rt.freeMemory()) / 1024 / 1024;
}

From source file:org.apache.accumulo.server.tabletserver.ScanRunState.java

private synchronized static void logGCInfo(AccumuloConfiguration conf) {
    List<GarbageCollectorMXBean> gcmBeans = ManagementFactory.getGarbageCollectorMXBeans();
    Runtime rt = Runtime.getRuntime();

    StringBuilder sb = new StringBuilder("gc");

    boolean sawChange = false;

    long maxIncreaseInCollectionTime = 0;

    for (GarbageCollectorMXBean gcBean : gcmBeans) {
        Long prevTime = prevGcTime.get(gcBean.getName());
        long pt = 0;
        if (prevTime != null) {
            pt = prevTime;/*from  w w  w . j  a  va2s. c om*/
        }

        long time = gcBean.getCollectionTime();

        if (time - pt != 0) {
            sawChange = true;
        }

        long increaseInCollectionTime = time - pt;
        sb.append(String.format(" %s=%,.2f(+%,.2f) secs", gcBean.getName(), time / 1000.0,
                increaseInCollectionTime / 1000.0));
        maxIncreaseInCollectionTime = Math.max(increaseInCollectionTime, maxIncreaseInCollectionTime);
        prevGcTime.put(gcBean.getName(), time);
    }

    long mem = rt.freeMemory();
    if (maxIncreaseInCollectionTime == 0) {
        gcTimeIncreasedCount = 0;
    } else {
        gcTimeIncreasedCount++;
        if (gcTimeIncreasedCount > 3 && mem < rt.maxMemory() * 0.05) {
            log.warn("Running low on memory");
            gcTimeIncreasedCount = 0;
        }
    }

    if (mem > lastMemorySize) {
        sawChange = true;
    }

    String sign = "+";
    if (mem - lastMemorySize <= 0) {
        sign = "";
    }

    sb.append(String.format(" freemem=%,d(%s%,d) totalmem=%,d", mem, sign, (mem - lastMemorySize),
            rt.totalMemory()));

    if (sawChange) {
        log.debug(sb.toString());
    }

    final long keepAliveTimeout = conf.getTimeInMillis(Property.INSTANCE_ZK_TIMEOUT);
    if (maxIncreaseInCollectionTime > keepAliveTimeout) {
        Halt.halt("Garbage collection may be interfering with lock keep-alive.  Halting.", -1);
    }

    lastMemorySize = mem;
}

From source file:spade.reporter.Audit.java

private void printStats(boolean forcePrint) {
    if (reportingEnabled || forcePrint) {
        long currentTime = System.currentTimeMillis();
        if (((currentTime - lastReportedTime) >= reportEveryMs) || forcePrint) {
            Runtime runtime = Runtime.getRuntime();
            long usedMemoryMB = (runtime.totalMemory() - runtime.freeMemory()) / (1024 * 1024);
            int internalBufferSize = getBuffer().size();
            String statString = String.format("Internal buffer size: %d, JVM memory in use: %dMB",
                    internalBufferSize, usedMemoryMB);
            if (REFINE_NET) {
                String netfilterStat = String.format(
                        "Unmatched: " + "%d netfilter-syscall, " + "%d syscall-netfilter. " + "Matched: "
                                + "%d netfilter-syscall, " + "%d syscall-netfilter.",
                        networkAnnotationsFromNetfilter.size(), networkAnnotationsFromSyscalls.size(),
                        matchedNetfilterSyscall, matchedSyscallNetfilter);
                statString += ", " + netfilterStat;
            }//w  w w  .  j  a v  a2 s . c  o m
            logger.log(Level.INFO, statString);
            lastReportedTime = currentTime;
        }
    }
}

From source file:br.com.riselabs.cotonet.builder.commands.ExternalGitCommand.java

/**
 * OBS: this method returns {@code null} when calling '
 * {@code git reset --hard}'./*from  www .j a  va2  s . c o  m*/
 * 
 * @return
 * @throws IOException
 */
public List<ConflictChunk<CommandLineBlameResult>> call() throws BlameException {
    Runtime run = Runtime.getRuntime();
    Process pr = null;
    String cmd = null;
    String[] env = {};
    BufferedReader buf;
    List<ConflictChunk<CommandLineBlameResult>> conflicts = null;
    int exitCode;
    try {
        switch (type) {
        case RESET:
            cmd = "git reset --hard";
            pr = run.exec(cmd, env, file);
            break;

        case BLAME:
        default:
            cmd = "git blame -p --line-porcelain";
            env = new String[1];
            // we need this to disable the pager
            env[0] = "GIT_PAGER=cat";
            pr = run.exec(cmd + " " + file, env, file.getParentFile());
            // parse output
            buf = new BufferedReader(new InputStreamReader(pr.getInputStream()));
            conflicts = new ArrayList<ConflictChunk<CommandLineBlameResult>>();

            final String CONFLICT_START = "<<<<<<<";
            final String CONFLICT_SEP = "=======";
            final String CONFLICT_END = ">>>>>>>";
            boolean addBlame = false;

            ConflictChunk<CommandLineBlameResult> conflict = new ConflictChunk<CommandLineBlameResult>(
                    file.getCanonicalPath());

            CommandLineBlameResult bResult;
            bResult = new CommandLineBlameResult(file.getCanonicalPath());
            Blame<CommandLineBlameResult> cBlame;
            cBlame = new Blame<CommandLineBlameResult>(scenario.getLeft(), bResult);
            List<String> block;
            while ((block = readPorcelainBlock(buf)) != null) {
                String commit = block.get(0).split(" ")[0];
                //   for (String line : block)
                //      System.out.println(line);

                Map<PKeys, String> data = getDataFromPorcelainBlock(block);

                String contentLine = data.get(PKeys.content);

                int n;
                if ((n = contentLine.trim().indexOf(" ")) == -1) {
                    // line without blank space
                    contentLine = contentLine.trim();
                } else {
                    contentLine = contentLine.trim().substring(0, n);
                }

                if (contentLine.equals(CONFLICT_START)) {
                    addBlame = true;
                    continue;
                } else if (contentLine.equals(CONFLICT_SEP)) {
                    addBlame = true;
                    cBlame.setRevision(scenario.getLeft());
                    conflict.setBase(scenario.getBase());
                    conflict.setLeft(cBlame);
                    bResult = new CommandLineBlameResult(file.getCanonicalPath());
                    cBlame = new Blame<CommandLineBlameResult>(scenario.getRight(), bResult);
                    continue;
                } else if (contentLine.equals(CONFLICT_END)) {
                    conflict.setRight(cBlame);
                    conflict.setLine(Integer.valueOf(data.get(PKeys.linenumber)));
                    conflicts.add(conflict);
                    addBlame = false;

                    bResult = new CommandLineBlameResult(file.getCanonicalPath());
                    cBlame = new Blame<CommandLineBlameResult>(scenario.getLeft(), bResult);

                    //@gustavo added this line
                    conflict = new ConflictChunk<CommandLineBlameResult>(file.getCanonicalPath());

                } else if (addBlame) {
                    // we are in one of the conflicting chunks
                    Integer linenumber = Integer.valueOf(data.get(PKeys.linenumber));
                    contentLine = data.get(PKeys.content);
                    String name = data.get(PKeys.authorname);
                    String email = data.get(PKeys.authormail);
                    DeveloperNode dev = new DeveloperNode(name, email);
                    conflict.setLine(linenumber);
                    bResult.addLineAuthor(linenumber, dev);
                    bResult.addLineContent(linenumber, contentLine);
                    bResult.addLineCommit(linenumber, commit);
                    continue;
                }
            }

            buf.close();
            break;
        }

        /*
         * already finished to execute the process. now, we should process
         * the error output.
         */
        buf = new BufferedReader(new InputStreamReader(pr.getErrorStream()));

        String stdErr = IOUtils.toString(pr.getErrorStream(), StandardCharsets.UTF_8).trim();

        IOUtils.closeQuietly(pr.getInputStream());
        IOUtils.closeQuietly(pr.getErrorStream());
        IOUtils.closeQuietly(pr.getOutputStream());

        exitCode = pr.waitFor();

        buf.close();
        if (!stdErr.isEmpty()) {
            Logger.log(String.format("Execution of '%s' returned standard error output:%n%s", cmd, stdErr));
            throw new RuntimeException(
                    String.format("Error on external call with exit code %d", pr.exitValue()));
        }
    } catch (IOException io) {
        try {
            throw new BlameException(file.getCanonicalPath(), "IO Exception", io);
        } catch (IOException e) {
        }
    } catch (InterruptedException ie) {
        // waitFor() exception
        exitCode = 666;
        try {
            throw new BlameException(file.getCanonicalPath(), String.format(
                    "Interrupted while waiting for '%s' to finish. Error code: '%s'", cmd, exitCode), ie);
        } catch (IOException io) {
        }
    } catch (RuntimeException re) {
        try {
            throw new BlameException(file.getCanonicalPath(), "Runtime Exception", re);
        } catch (IOException e) {
        }
    } finally {
        run.freeMemory();
    }
    pr.destroyForcibly();
    return conflicts;
}