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

StringgetNowMemoryStatus()
get Now Memory Status 
return nowMemoryStatus;
StringgetRuntimeMemoryStats()
Get stringified runtime memory stats 
return String.format("Memory (free/total/max) = %.2fM / %.2fM / %.2fM", freeMemoryMB(), totalMemoryMB(),
        maxMemoryMB());
StringgetRuntimeMemoryStats()
Get stringified runtime memory stats 
return "totalMem = " + (Runtime.getRuntime().totalMemory() / 1024f / 1024f) + "M, maxMem = "
        + (Runtime.getRuntime().maxMemory() / 1024f / 1024f) + "M, freeMem = "
        + (Runtime.getRuntime().freeMemory() / 1024f / 1024f) + "M";
String[]getSummaryMemoryReportHeader()
get Summary Memory Report Header 
final String[] header = { "ontology", "query", "rew mem [Kb]", "depgraph mem [Kb]" };
return header;
StringgetTotalMemoryStringInMb()
get Total Memory String In Mb 
return memroyFormat.format(getTotalMemoryInMb());
intparseMemory(String s, int def)
parse Memory 
try {
    return Integer.parseInt(s);
} catch (Exception e) {
    int a = parseInt(s.substring(0, s.length() - 1), def);
    if (s.endsWith("g"))
        return a * 1024;
    else if (s.endsWith("k"))
        return a / 1024;
...
longparseMemorySize(String arg)
Parses a memory size with optional g/m/k quantifiers into its number representation. 
if (arg.endsWith("g") || arg.endsWith("G"))
    return Long.parseLong(arg.substring(0, arg.length() - 1)) * 1024 * 1024 * 1024;
else if (arg.endsWith("m") || arg.endsWith("M"))
    return Long.parseLong(arg.substring(0, arg.length() - 1)) * 1024 * 1024;
else if (arg.endsWith("k") || arg.endsWith("K"))
    return Long.parseLong(arg.substring(0, arg.length() - 1)) * 1024;
else
    return Long.parseLong(arg.substring(0, arg.length()));
...
StringprettyPrintMemory(long size, boolean includeSpace)
pretty Print Memory 
if (size >= 1 << 30)
    return String.format("%.3f%sGiB", size / (double) (1 << 30), includeSpace ? " " : "");
if (size >= 1 << 20)
    return String.format("%.3f%sMiB", size / (double) (1 << 20), includeSpace ? " " : "");
return String.format("%.3f%sKiB", size / (double) (1 << 10), includeSpace ? " " : "");
StringprettyPrintMemoryPerSecond(long rate)
pretty Print Memory Per Second 
if (rate >= 1 << 30)
    return String.format("%.3fGiB/s", rate / (double) (1 << 30));
if (rate >= 1 << 20)
    return String.format("%.3fMiB/s", rate / (double) (1 << 20));
return String.format("%.3fKiB/s", rate / (double) (1 << 10));
StringprintMemory()
print Memory 
return printMemory(null);