Java Agent for Memory Measurements (jamm) - Setup

Setup steps:

https://github.com/jbellis/jamm

To use MemoryMeter, start the JVM with "-javaagent:<jar path>/jamm.jar"

For example:

@Override
public String toString() {
    MemoryMeter meter = new MemoryMeter();

    return “MessureDeep:” + meter.measureDeep(hashMap)

}

Output:

MessureDeep =343163544 // output is in bytes

((343163544/1024)/1024) = 327.2662582397461 MB (that means hashMap is holding 327 MB of data in memory)