Example usage for java.lang Runtime freeMemory

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:com.joliciel.talismane.utils.LogUtils.java

/**
 * Log the available runtime memory.// w  ww .  j av  a2  s . com
 */
public static void logMemory(Log logger) {
    if (logger.isTraceEnabled()) {
        //Getting the runtime reference from system
        Runtime runtime = Runtime.getRuntime();
        logger.trace("##### Heap utilization statistics [MB] #####");

        //Print used memory
        logger.trace("Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / MEGABYTE);

        //Print free memory
        logger.trace("Free Memory:" + runtime.freeMemory() / MEGABYTE);

        //Print total available memory
        logger.trace("Total Memory:" + runtime.totalMemory() / MEGABYTE);

        //Print Maximum available memory
        logger.trace("Max Memory:" + runtime.maxMemory() / MEGABYTE);
    }
}

From source file:com.baasbox.service.storage.StatisticsService.java

public static ImmutableMap memory() {
    if (BaasBoxLogger.isTraceEnabled())
        BaasBoxLogger.trace("Method Start");
    ImmutableMap response = null;/*from   w  w  w .j a  v  a 2  s  .c  o m*/

    if (BBConfiguration.getStatisticsSystemMemory()) {
        Runtime rt = Runtime.getRuntime();
        long maxMemory = rt.maxMemory();
        long freeMemory = rt.freeMemory();
        long totalMemory = rt.totalMemory();
        response = ImmutableMap.of("max_allocable_memory", maxMemory, "current_allocate_memory", totalMemory,
                "used_memory_in_the_allocate_memory", totalMemory - freeMemory,
                "free_memory_in_the_allocated_memory", freeMemory);
    } else {
        response = ImmutableMap.of("max_allocable_memory", 0, "current_allocate_memory", 0,
                "used_memory_in_the_allocate_memory", 0, "free_memory_in_the_allocated_memory", 0);
    }

    if (BaasBoxLogger.isTraceEnabled())
        BaasBoxLogger.trace("Method End");
    return response;
}

From source file:net.ymate.platform.core.util.RuntimeUtils.java

/**
 * //from   w w w  .j  a v  a  2s  .c  o  m
 *
 * @return ??
 */
public static long gc() {
    Runtime rt = Runtime.getRuntime();
    long lastUsed = rt.totalMemory() - rt.freeMemory();
    rt.gc();
    return lastUsed - rt.totalMemory() + rt.freeMemory();
}

From source file:com.eryansky.utils.SigarUtil.java

/**
 * ??//from   w w  w.j  a va2 s. co m
 * @throws Exception
 */
public static ServerStatus getServerStatus() throws Exception {
    ServerStatus status = new ServerStatus();
    status.setServerTime(DateFormatUtils.format(Calendar.getInstance(), "yyyy-MM-dd HH:mm:ss"));
    status.setServerName(System.getenv().get("COMPUTERNAME"));

    Runtime rt = Runtime.getRuntime();
    //status.setIp(InetAddress.getLocalHost().getHostAddress());
    status.setJvmTotalMem(rt.totalMemory() / (1024 * 1024));
    status.setJvmFreeMem(rt.freeMemory() / (1024 * 1024));
    status.setJvmMaxMem(rt.maxMemory() / (1024 * 1024));
    Properties props = System.getProperties();
    status.setServerOs(props.getProperty("os.name") + " " + props.getProperty("os.arch") + " "
            + props.getProperty("os.version"));
    status.setJavaHome(props.getProperty("java.home"));
    status.setJavaVersion(props.getProperty("java.version"));
    status.setJavaTmpPath(props.getProperty("java.io.tmpdir"));

    Sigar sigar = new Sigar();
    getServerCpuInfo(sigar, status);
    getServerDiskInfo(sigar, status);
    getServerMemoryInfo(sigar, status);

    return status;
}

From source file:gridool.util.system.SystemUtils.java

public static long getFreeMemory() {
    final Runtime runtime = Runtime.getRuntime();
    return runtime.freeMemory();
}

From source file:org.openkoala.koala.monitor.support.ServerStatusCollector.java

/**
 * ???/* ww w . j av  a  2s . c  o m*/
 * @return
 */
public static void getServerBaseInfo(ServerStatusVo status) {
    status.setServerTime(DateFormatUtils.format(Calendar.getInstance(), "yyyy-MM-dd HH:mm:ss"));
    status.setServerName(System.getenv().get("COMPUTERNAME"));
    //      status.setJavaServer(RuntimeContext.getContext().getServerName());
    //      status.setDeployPath(RuntimeContext.getContext().getDeployPath());

    Runtime rt = Runtime.getRuntime();
    status.setJvmTotalMem(rt.totalMemory() / (1024 * 1024));
    status.setJvmFreeMem(rt.freeMemory() / (1024 * 1024));

    Properties props = System.getProperties();
    status.setServerOs(props.getProperty("os.name") + " " + props.getProperty("os.arch") + " "
            + props.getProperty("os.version"));
    status.setJavaHome(props.getProperty("java.home"));
    status.setJavaVersion(props.getProperty("java.version"));
    status.setJavaTmpPath(props.getProperty("java.io.tmpdir"));

}

From source file:org.tranche.logs.LogUtil.java

/**
 * //from w w  w.  j  a  va  2  s.c  o  m
 * @return
 */
public static final String getEnvironmentDump() {
    StringBuffer buf = new StringBuffer();
    buf.append("Build: @buildNumber" + "\n");
    try {
        buf.append("Internet host/address: " + java.net.InetAddress.getLocalHost() + "\n");
    } catch (Exception e) {
    }
    Runtime rt = Runtime.getRuntime();
    long fm = rt.freeMemory();
    long tm = rt.totalMemory();
    long mm = rt.maxMemory();
    buf.append("Memory: ");
    buf.append("\n");
    buf.append("    Free: " + TextUtil.formatBytes(fm));
    buf.append("\n");
    buf.append("    Used: " + TextUtil.formatBytes(tm - fm));
    buf.append("\n");
    buf.append("    Total: " + TextUtil.formatBytes(tm));
    buf.append("\n");
    buf.append("    Maximum:" + TextUtil.formatBytes(mm));
    buf.append("\n" + "\n" + "\n");
    return buf.toString();
}

From source file:com.viettel.logistic.common.logs.KPILogger.java

public static void checkMemory(String functionName) {
    //Getting the runtime reference from system
    Runtime runtime = Runtime.getRuntime();
    int mb = 1024 * 1024;

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

    //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);

}

From source file:org.apache.flink.runtime.instance.HardwareDescriptionFactory.java

/**
 * Returns the size of free memory in bytes available to the JVM.
 * //from w w  w . j a va2 s.c  o  m
 * @return the size of the free memory in bytes available to the JVM or <code>-1</code> if the size cannot be
 *         determined
 */
private static long getSizeOfFreeMemory() {
    Runtime r = Runtime.getRuntime();
    long available = r.maxMemory() - r.totalMemory() + r.freeMemory();

    return available;
}

From source file:com.dajodi.scandic.Util.java

public static void printMemory() {
    Runtime runtime = Runtime.getRuntime();

    long maxMemory = runtime.maxMemory();
    long allocatedMemory = runtime.totalMemory();
    long freeMemory = runtime.freeMemory();
    long totalFreeMemory = (freeMemory + (maxMemory - allocatedMemory)) / 1024;
    Log.d("free memory: " + freeMemory / 1024);
    Log.d("allocated memory: " + allocatedMemory / 1024);
    Log.d("max memory: " + maxMemory / 1024);
    Log.d("total free memory: " + totalFreeMemory);
}