Here you can find the source of freeReserveMemory()
public static void freeReserveMemory()
//package com.java2s; /*//from w ww . ja v a2 s. co m * Copyright 2004-2009 H2 Group. Multiple-Licensed under the H2 License, Version 1.0, and under the Eclipse Public License, Version 1.0 * (http://h2database.com/html/license.html). Initial Developer: H2 Group */ public class Main { private static volatile byte[] reserveMemory; /** * Free up the reserve memory. */ public static void freeReserveMemory() { reserveMemory = null; } }