Java Utililty Methods Memory Usage

List of utility methods to do Memory Usage

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Description

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

Method

StringgetMemoryUsage()
get Memory Usage 
String result = "free: " + format(Runtime.getRuntime().freeMemory());
result += ", max: " + format(Runtime.getRuntime().maxMemory());
return result;
doublegetMemoryUsage()
Return the Difference (in MegaBytes) between the first sampled free memory and current free memory 
long diff = startMemory - Runtime.getRuntime().freeMemory();
return ConvertByteToMegaByte(diff);
StringgetMemoryUsage()
get Memory Usage 
return ((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / MB) + "/"
        + (Runtime.getRuntime().totalMemory() / MB) + "/" + (Runtime.getRuntime().maxMemory() / MB + " Mb");
longgetMemoryUsage()
get Memory Usage 
return getTotalMemory() - getFreeMemory();
StringgetMemoryUsage()
get Memory Usage 
Runtime rt = Runtime.getRuntime();
long total = rt.totalMemory() / (1024 * 1024);
long free = rt.freeMemory() / (1024 * 1024);
return String.format("Used: %d MB, Free: %d MB, Total: %d MB", total - free, free, total);
longgetMemoryUsage()
get Memory Usage 
takeOutGarbage();
long totalMemory = Runtime.getRuntime().totalMemory();
takeOutGarbage();
long freeMemory = Runtime.getRuntime().freeMemory();
return (totalMemory - freeMemory);
longgetMemoryUsage()
Returns the amount of memory currently used by the JVM. 
hardClean();
return runtime.totalMemory() - runtime.freeMemory();
StringgetMemoryUsage()
Report memory usage, including used memory, free memory, total memory, and the maximum memory allotable to the JVM 
Runtime rt = Runtime.getRuntime();
long max = rt.maxMemory();
long total = rt.totalMemory();
long free = rt.freeMemory();
return String.format("Memory used: %s, free: %s, total: %s, max: %s", formatMemory(total - free),
        formatMemory(free), formatMemory(total), formatMemory(max));
longgetMemoryUsage()
get Memory Usage 
return runtime.totalMemory() - runtime.freeMemory();
longgetMemoryUsage()
Gets memory usage, in MB 
long memory = Runtime.getRuntime().totalMemory();
return Math.round(memory / Math.pow(2, 20));