forked from prestodb/presto
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Change PlanNodeStats from a union class to hierarchy
- Loading branch information
1 parent
1630408
commit de2a775
Showing
5 changed files
with
226 additions
and
80 deletions.
There are no files selected for viewing
100 changes: 100 additions & 0 deletions
100
...src/main/java/com/facebook/presto/sql/planner/planPrinter/HashCollisionPlanNodeStats.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Licensed 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 com.facebook.presto.sql.planner.planPrinter; | ||
|
|
||
| import com.facebook.presto.sql.planner.plan.PlanNodeId; | ||
| import io.airlift.units.DataSize; | ||
| import io.airlift.units.Duration; | ||
|
|
||
| import java.util.Map; | ||
|
|
||
| import static com.google.common.base.Preconditions.checkArgument; | ||
| import static java.lang.Math.max; | ||
| import static java.lang.Math.sqrt; | ||
| import static java.util.Objects.requireNonNull; | ||
| import static java.util.stream.Collectors.toMap; | ||
|
|
||
| public class HashCollisionPlanNodeStats | ||
| extends PlanNodeStats | ||
| { | ||
| private final Map<String, OperatorHashCollisionsStats> operatorHashCollisionsStats; | ||
|
|
||
| public HashCollisionPlanNodeStats( | ||
| PlanNodeId planNodeId, | ||
| Duration planNodeScheduledTime, | ||
| Duration planNodeCpuTime, | ||
| long planNodeInputPositions, | ||
| DataSize planNodeInputDataSize, | ||
| long planNodeOutputPositions, | ||
| DataSize planNodeOutputDataSize, | ||
| Map<String, OperatorInputStats> operatorInputStats, | ||
| Map<String, OperatorHashCollisionsStats> operatorHashCollisionsStats) | ||
| { | ||
| super(planNodeId, planNodeScheduledTime, planNodeCpuTime, planNodeInputPositions, planNodeInputDataSize, planNodeOutputPositions, planNodeOutputDataSize, operatorInputStats); | ||
| this.operatorHashCollisionsStats = requireNonNull(operatorHashCollisionsStats, "operatorHashCollisionsStats is null"); | ||
| } | ||
|
|
||
| public Map<String, Double> getOperatorHashCollisionsAverages() | ||
| { | ||
| return operatorHashCollisionsStats.entrySet().stream() | ||
| .collect(toMap( | ||
| Map.Entry::getKey, | ||
| entry -> entry.getValue().getWeightedHashCollisions() / operatorInputStats.get(entry.getKey()).getInputPositions())); | ||
| } | ||
|
|
||
| public Map<String, Double> getOperatorHashCollisionsStdDevs() | ||
| { | ||
| return operatorHashCollisionsStats.entrySet().stream() | ||
| .collect(toMap( | ||
| Map.Entry::getKey, | ||
| entry -> computedWeightedStdDev( | ||
| entry.getValue().getWeightedSumSquaredHashCollisions(), | ||
| entry.getValue().getWeightedHashCollisions(), | ||
| operatorInputStats.get(entry.getKey()).getInputPositions()))); | ||
| } | ||
|
|
||
| private static double computedWeightedStdDev(double sumSquared, double sum, double totalWeight) | ||
| { | ||
| double average = sum / totalWeight; | ||
| double variance = (sumSquared - 2 * sum * average) / totalWeight + average * average; | ||
| // variance might be negative because of numeric inaccuracy, therefore we need to use max | ||
| return sqrt(max(variance, 0d)); | ||
| } | ||
|
|
||
| public Map<String, Double> getOperatorExpectedCollisionsAverages() | ||
| { | ||
| return operatorHashCollisionsStats.entrySet().stream() | ||
| .collect(toMap( | ||
| Map.Entry::getKey, | ||
| entry -> entry.getValue().getWeightedExpectedHashCollisions() / operatorInputStats.get(entry.getKey()).getInputPositions())); | ||
| } | ||
|
|
||
| @Override | ||
| public PlanNodeStats mergeWith(PlanNodeStats other) | ||
| { | ||
| checkArgument(other instanceof HashCollisionPlanNodeStats, "other is not an instanceof HashCollisionPlanNodeStats"); | ||
| PlanNodeStats merged = super.mergeWith(other); | ||
|
|
||
| return new HashCollisionPlanNodeStats( | ||
| merged.getPlanNodeId(), | ||
| merged.getPlanNodeScheduledTime(), | ||
| merged.getPlanNodeCpuTime(), | ||
| merged.getPlanNodeInputPositions(), | ||
| merged.getPlanNodeInputDataSize(), | ||
| merged.getPlanNodeOutputPositions(), | ||
| merged.getPlanNodeOutputDataSize(), | ||
| merged.operatorInputStats, | ||
| operatorHashCollisionsStats); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.