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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -61,4 +61,10 @@ public long getPendingRequests() | |
| { | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public long getUsedBufferCount() | ||
| { | ||
| return 0; | ||
| } | ||
| } | ||
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94 changes: 94 additions & 0 deletions
94
processing/src/main/java/org/apache/druid/query/groupby/GroupByStatsProvider.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * 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.druid.query.groupby; | ||
|
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| import org.apache.druid.collections.BlockingPool; | ||
| import org.apache.druid.guice.annotations.Merging; | ||
| import org.apache.druid.query.groupby.epinephelinae.LimitedTemporaryStorage; | ||
|
|
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| import javax.inject.Inject; | ||
| import java.nio.ByteBuffer; | ||
| import java.util.Iterator; | ||
| import java.util.concurrent.ConcurrentLinkedQueue; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
|
|
||
| /** | ||
| * Collects stats for group by queries like used merged buffer count, spilled bytes and group by resource acquisition time. | ||
| */ | ||
| public class GroupByStatsProvider | ||
| { | ||
| private final AtomicLong groupByResourceAcquisitionTimeNs = new AtomicLong(0); | ||
| private final AtomicLong groupByResourceAcquisitionCount = new AtomicLong(0); | ||
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| private final BlockingPool<ByteBuffer> blockingPool; | ||
| private final ConcurrentLinkedQueue<LimitedTemporaryStorage> temporaryStorages; | ||
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| @Inject | ||
| public GroupByStatsProvider(@Merging BlockingPool<ByteBuffer> blockingPool) | ||
| { | ||
| this.blockingPool = blockingPool; | ||
| this.temporaryStorages = new ConcurrentLinkedQueue<>(); | ||
| } | ||
|
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| public synchronized void groupByResourceAcquisitionTimeNs(long delayNs) | ||
| { | ||
| groupByResourceAcquisitionTimeNs.addAndGet(delayNs); | ||
| groupByResourceAcquisitionCount.incrementAndGet(); | ||
| } | ||
|
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| public synchronized long getAndResetGroupByResourceAcquisitionStats() | ||
| { | ||
| long average = (groupByResourceAcquisitionTimeNs.get() / groupByResourceAcquisitionCount.get()); | ||
|
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| groupByResourceAcquisitionTimeNs.set(0); | ||
| groupByResourceAcquisitionCount.set(0); | ||
|
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| return average; | ||
| } | ||
|
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| public long getAcquiredMergeBufferCount() | ||
| { | ||
| return blockingPool.getUsedBufferCount(); | ||
| } | ||
|
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| public void registerTemporaryStorage(LimitedTemporaryStorage temporaryStorage) | ||
| { | ||
| temporaryStorages.add(temporaryStorage); | ||
| } | ||
|
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| public long getSpilledBytes() | ||
| { | ||
| long spilledBytes = 0; | ||
|
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| Iterator<LimitedTemporaryStorage> iterator = temporaryStorages.iterator(); | ||
|
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| while (iterator.hasNext()) { | ||
| LimitedTemporaryStorage limitedTemporaryStorage = iterator.next(); | ||
|
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| spilledBytes += limitedTemporaryStorage.currentSize(); | ||
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| if (limitedTemporaryStorage.isClosed()) { | ||
| iterator.remove(); | ||
| } | ||
| } | ||
|
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| return spilledBytes; | ||
| } | ||
| } |
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