| /* |
| * 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.drill.exec.planner.physical.visitor; |
| |
| import org.apache.drill.exec.ExecConstants; |
| import org.apache.drill.exec.planner.cost.DrillCostBase; |
| import org.apache.drill.exec.planner.physical.Prel; |
| import org.apache.drill.exec.server.options.OptionManager; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.calcite.rel.metadata.RelMetadataQuery; |
| |
| public class MemoryEstimationVisitor extends BasePrelVisitor<Double, Void, RuntimeException> { |
| |
| private static final Logger logger = LoggerFactory.getLogger(MemoryEstimationVisitor.class); |
| |
| public static boolean enoughMemory(Prel prel, OptionManager options, int numDrillbits) { |
| long allottedMemory = options.getOption(ExecConstants.MAX_QUERY_MEMORY_PER_NODE_KEY).num_val * numDrillbits; |
| long estimatedMemory = (long) Math.ceil(prel.accept(new MemoryEstimationVisitor(), null) / (1024.0 * 1024.0)); |
| estimatedMemory += options.getOption(ExecConstants.NON_BLOCKING_OPERATORS_MEMORY_KEY).num_val * numDrillbits; |
| |
| if (estimatedMemory > allottedMemory) { |
| logger.debug("Estimated memory (" + estimatedMemory + ") exceeds maximum allowed (" + allottedMemory + ")"); |
| } else { |
| logger.debug("Estimated memory (" + estimatedMemory + ") within maximum allowed (" + allottedMemory + ")"); |
| } |
| return estimatedMemory <= allottedMemory; |
| } |
| |
| public static Double estimateMemory(Prel prel) { |
| return prel.accept(new MemoryEstimationVisitor(), null); |
| } |
| |
| public MemoryEstimationVisitor() { } |
| |
| @Override |
| public Double visitPrel(Prel prel, Void value) throws RuntimeException { |
| RelMetadataQuery mq = RelMetadataQuery.instance(); |
| return ((DrillCostBase) mq.getCumulativeCost(prel)).getMemory(); |
| // return findCost(prel, mq); |
| } |
| |
| @SuppressWarnings("unused") |
| private double findCost(Prel prel, RelMetadataQuery mq) { |
| DrillCostBase cost = (DrillCostBase) mq.getNonCumulativeCost(prel); |
| double memory = cost.getMemory(); |
| |
| for (Prel child : prel) { |
| memory += findCost(child, mq); |
| } |
| return memory; |
| } |
| } |