Example usage for java.lang Runtime totalMemory

Introduction

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

Prototype

public native long totalMemory();

Source Link

Document

Returns the total amount of memory in the Java virtual machine.

Usage

From source file:Main.java

public static long getUsedMemorySize() {

    long freeSize = 0L;
    long totalSize = 0L;
    long usedSize = -1L;
    try {/*from   w  ww .  j  av a2 s  . co m*/
        Runtime info = Runtime.getRuntime();
        freeSize = info.freeMemory();
        totalSize = info.totalMemory();
        usedSize = totalSize - freeSize;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return usedSize / 1048576L;

}

From source file:Main.java

public static long getPhysicalMemorySize() {

    long freeSize = 0L;
    long totalSize = 0L;
    long usedSize = -1L;
    try {/* w  w w  .j a va  2 s .  c  o m*/
        Runtime info = Runtime.getRuntime();
        freeSize = info.freeMemory();
        totalSize = info.totalMemory();
        usedSize = totalSize - freeSize;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return totalSize / 1048576L;

}

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:Util.java

/**
 * Returns a report of used and available memory.
 * //from   w  ww .  j a v  a 2  s . c o  m
 * @return a report of used and available memory
 */
@SuppressWarnings("boxing")
public static String memoryReport() {
    Runtime runtime = Runtime.getRuntime();
    long freemem = runtime.freeMemory();
    long totalmem = runtime.totalMemory();
    return String.format(
            "%.1f MB of memory free out of %.1f MB total in JVM (%.1f MB used).  Configured maximum: %.1f MB.",
            freemem / BYTES_PER_MB, totalmem / BYTES_PER_MB, (totalmem - freemem) / BYTES_PER_MB,
            runtime.maxMemory() / BYTES_PER_MB);
}

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

public static long getUsedMemory() {
    final Runtime runtime = Runtime.getRuntime();
    final long freeBytes = runtime.freeMemory();
    final long totalBytes = runtime.totalMemory();
    return totalBytes - freeBytes;
}

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 ww .ja  v a  2  s.co 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: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:com.bstek.dorado.console.utils.SystemUtils.java

/**
 * ??//  www.  j  a v  a  2  s  .  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: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());
}