/* * 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.rocketmq.store; import java.lang.management.ManagementFactory; import java.lang.management.OperatingSystemMXBean; // public class StoreUtil { public static final long TOTAL_PHYSICAL_MEMORY_SIZE = getTotalPhysicalMemorySize(); @SuppressWarnings("restriction") public static long getTotalPhysicalMemorySize() { long physicalTotal = 1024 * 1024 * 1024 * 24L; OperatingSystemMXBean osmxb = ManagementFactory.getOperatingSystemMXBean(); if (osmxb instanceof com.sun.management.OperatingSystemMXBean) { physicalTotal = ((com.sun.management.OperatingSystemMXBean) osmxb).getTotalPhysicalMemorySize(); } return physicalTotal; } }