Java Memory Information getConsumedMemory(boolean preRunGarbageCollector)

Description

get Consumed Memory

License

Open Source License

Declaration

public static long getConsumedMemory(boolean preRunGarbageCollector) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    public static long getConsumedMemory(boolean preRunGarbageCollector) {
        Runtime rt = getRuntimeAndRunGC(preRunGarbageCollector);
        return bytesToMegabytes(rt.totalMemory() - rt.freeMemory());
    }/*from   w ww.ja  va  2s  . com*/

    private static Runtime getRuntimeAndRunGC(boolean preRunGarbageCollector) {
        Runtime rt = Runtime.getRuntime();
        if (preRunGarbageCollector) {
            //long startTime = System.currentTimeMillis();                               //DEBUG
            rt.gc();
            //System.out.println("GC takes "+(System.currentTimeMillis()-startTime)+" ms.");   //DEBUG
        }
        return rt;
    }

    private static long bytesToMegabytes(long bytes) {
        long MEGABYTE = 1024L * 1024L;
        return bytes / MEGABYTE;
    }
}

Related

1. getAviableMemoryAsString()
2. getDenotationOfJVMMemorySettings(String stringMapJavaOpts)
3. getInMemoryURL(String dbName)
4. getJavaMemorySize(String string)
5. getJVMMemoryMB()