1 /** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 package org.apache.hadoop.hbase.regionserver; 20 21 import org.apache.hadoop.hbase.classification.InterfaceAudience; 22 import org.apache.hadoop.hbase.classification.InterfaceStability; 23 import org.apache.hadoop.conf.Configurable; 24 import org.apache.hadoop.hbase.regionserver.HeapMemoryManager.TunerContext; 25 import org.apache.hadoop.hbase.regionserver.HeapMemoryManager.TunerResult; 26 27 /** 28 * Makes the decision regarding proper sizing of the heap memory. Decides what percentage of heap 29 * memory should be allocated for global memstore and BlockCache. 30 */ 31 @InterfaceAudience.Private 32 @InterfaceStability.Evolving 33 public interface HeapMemoryTuner extends Configurable { 34 35 /** 36 * Perform the heap memory tuning operation. 37 * 38 * @param context 39 * @return <code>TunerResult</code> including the heap percentage for memstore and block cache 40 */ 41 TunerResult tune(TunerContext context); 42 }