@Override
    public long getSurvivorCommitted() {
        if (null == pSSurvivorSpaceMxBean) {
            return 0;
        }
        return pSSurvivorSpaceMxBean.getUsage().getCommitted();
    }
@author Robert HG (254963746@qq.com) on 9/15/15.
lts-core/src/main/java/com/github/ltsopensource/jvmmonitor/mbean/JVMMemory.java