Java Utililty Methods Memory Information

List of utility methods to do Memory Information

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Description

The list of methods to do Memory Information are organized into topic(s).

Method

StringgetAviableMemoryAsString()
get Aviable Memory As String 
long avaiableMemory = getAvaiableMemory();
double d = avaiableMemory / 1048576;
return (int) d + "MB";
longgetConsumedMemory(boolean preRunGarbageCollector)
get Consumed Memory 
Runtime rt = getRuntimeAndRunGC(preRunGarbageCollector);
return bytesToMegabytes(rt.totalMemory() - rt.freeMemory());
chargetDenotationOfJVMMemorySettings(String stringMapJavaOpts)
get Denotation Of JVM Memory Settings 
int index = -1;
if (stringMapJavaOpts.lastIndexOf('k') != -1) {
    return 'k';
} else if (stringMapJavaOpts.lastIndexOf('K') != -1) {
    return 'K';
} else if ((index = stringMapJavaOpts.lastIndexOf('m')) != -1 && index != 2) {
    return 'm';
} else if ((index = stringMapJavaOpts.lastIndexOf('M')) != -1) {
...
StringgetInMemoryURL(String dbName)
get In Memory URL 
String url = IN_MEMORY_URL_PREFIX + dbName;
return url;
longgetJavaMemorySize(String string)
get Java Memory Size 
String suffix = string.substring(string.length() - 1);
if (!suffix.matches(DIGITS_PATTERN)) {
    long value = Long.parseLong(string.substring(0, string.length() - 1));
    if (suffix.equalsIgnoreCase("k")) {
        value *= K;
    } else if (suffix.equalsIgnoreCase("m")) {
        value *= M;
    } else if (suffix.equalsIgnoreCase("g")) {
...
longgetJVMMemoryMB()
get JVM Memory MB 
return (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / mb;
StringgetMemory()
get Memory 
return tidyFileSize(Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) + " / "
        + tidyFileSize(Runtime.getRuntime().totalMemory()) + " / "
        + tidyFileSize(Runtime.getRuntime().maxMemory());
longgetMemory()
get Memory 
long used = 0;
for (int i = 0; i < 10; i++) {
    System.gc();
    long total = Runtime.getRuntime().totalMemory();
    long free = Runtime.getRuntime().freeMemory();
    used = total - free;
    if (used < MAX_MEMORY)
        return used;
...
longgetMemory(String memory)
get Memory 
switch (memory.charAt(memory.length() - 1)) {
case 'k':
case 'K':
    return Long.parseLong(memory.substring(0, memory.length() - 1)) * 1000L;
case 'm':
case 'M':
    return Long.parseLong(memory.substring(0, memory.length() - 1)) * 1000000L;
case 'g':
...
longgetMemoryConsumedSincePreviousCall()
Returns amount of memory consumed since last call to getFreeMemory() (or this method) 
long currentConsumption = runtime.freeMemory();
long consumed = currentConsumption - lastMemoryReading;
lastMemoryReading = currentConsumption;
return consumed;