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: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) + "}";
}

From source file:Mem.java

public static long used() {
    Runtime r = Runtime.getRuntime();
    return r.totalMemory() - r.freeMemory();
}

From source file:Main.java

public static long availableMemory() {
    final Runtime runtime = Runtime.getRuntime();
    final long used = runtime.totalMemory() - runtime.freeMemory();

    final ActivityManager activityManager = (ActivityManager) sContext
            .getSystemService(Context.ACTIVITY_SERVICE);
    final long total = activityManager.getMemoryClass() * 1024 * 1024;

    return total - used;
}

From source file:com.talis.entity.TestUtils.java

public static void showMemory() {
    Runtime r = Runtime.getRuntime();
    long bytes = r.totalMemory() - r.freeMemory();
    System.out.println(String.format("Memory usage : %s (%s)", FileUtils.byteCountToDisplaySize(bytes), bytes));
}

From source file:MemoryUtils.java

static double usedMemory(Runtime runtime) {
    long totalMemory = runtime.totalMemory();
    long freeMemory = runtime.freeMemory();
    double usedMemory = (double) (totalMemory - freeMemory) / (double) (1024 * 1024);
    return usedMemory;
}

From source file:com.bstek.dorado.console.utils.SystemUtils.java

/**
 * ??//from  w w w  .  j  a va  2s .c o  m
 * 
 * @return
 */
public static Map<String, Object> getMemoryInfo() {
    Map<String, Object> map = new HashMap<String, Object>();
    Runtime runtime = Runtime.getRuntime();
    map.put("runtime", runtime);

    map.put("freeMemory", runtime.freeMemory());
    map.put("totalMemory", runtime.totalMemory());
    if (System.getProperty("java.version").compareTo("1.4") >= 0)
        map.put("maxMemory", runtime.maxMemory());
    else
        map.put("maxMemory", "N/A");

    map.put("CPU", runtime.availableProcessors());
    return map;
}

From source file:ee.ria.xroad.proxy.opmonitoring.OpMonitoringBufferMemoryUsage.java

private static long getUsedBytes(Runtime runtime) {
    return runtime.totalMemory() - runtime.freeMemory();
}

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

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

From source file:net.nosleep.superanalyzer.util.Misc.java

public static void printMemoryInfo(String tag) {
    Runtime rt = Runtime.getRuntime();
    long free = rt.freeMemory();
    long total = rt.totalMemory();
    long max = rt.maxMemory();

    System.out.println("Memory (" + tag + "): " + free + "/" + total + " (max " + max + ")");
}

From source file:ninja.undertow.Benchmarker.java

static public void logMemory() {
    //Getting the runtime reference from system
    Runtime runtime = Runtime.getRuntime();

    log.info("##### Heap utilization statistics [MB] #####");

    //Print used memory
    log.info("Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()));

    //Print free memory
    log.info("Free Memory:" + runtime.freeMemory());

    //Print total available memory
    log.info("Total Memory:" + runtime.totalMemory());

    //Print Maximum available memory
    log.info("Max Memory:" + runtime.maxMemory());
}