@Override
                public MemoryUsage getUsage() {
                    return memoryPoolMXBean.getUsage();
                }
Metric for detailed memory usages

@author dawidmalina
@author HyunGil Jeong
agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/monitor/metric/memory/DefaultDetailedMemoryMetric.java