src/main/java/org/apache/giraph/utils/MemoryUtils.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.giraph.utils;

/**
 * Helper static methods for tracking memory usage.
 */
public class MemoryUtils {
    /**
     * Get stringified runtime memory stats
     *
     * @return String of all Runtime stats.
     */
    public static String getRuntimeMemoryStats() {
        return "totalMem = " +
               (Runtime.getRuntime().totalMemory() / 1024f / 1024f) +
               "M, maxMem = "  +
               (Runtime.getRuntime().maxMemory() / 1024f / 1024f) +
               "M, freeMem = " +
               (Runtime.getRuntime().freeMemory() / 1024f / 1024f)
                + "M";
    }
}