org.smartfrog.services.hadoop.graph.MemoryUtil.java Source code

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Here is the source code for org.smartfrog.services.hadoop.graph.MemoryUtil.java

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/** (C) Copyright 2009 Hewlett-Packard Development Company, LP
    
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
    
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.
    
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    
 For more information: www.smartfrog.org
    
 */

package org.smartfrog.services.hadoop.graph;

import org.apache.commons.logging.Log;

/**
 * Utility class to measure memory consumed
 */
public class MemoryUtil {

    public static long getUsedMemory() {
        System.gc();
        System.gc();
        System.gc();

        return (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (1024 * 1024);
    }

    public static void printUsedMemory(Log log) {
        log.info("Memory used:" + getUsedMemory() + " MB");
    }

}