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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2021/11/30 13:13:53 UTC
[GitHub] [druid] abhishekagarwal87 commented on a change in pull request #12001: Intern RowSignature in DruidSchema to reduce its memory footprint
abhishekagarwal87 commented on a change in pull request #12001:
URL: https://github.com/apache/druid/pull/12001#discussion_r759259044
##########
File path: benchmarks/src/test/java/org/apache/druid/benchmark/DruidSchemaAddSegmentBenchmark.java
##########
@@ -0,0 +1,196 @@
+/*
+ * 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.benchmark;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+import org.apache.druid.client.BrokerInternalQueryConfig;
+import org.apache.druid.client.TimelineServerView;
+import org.apache.druid.java.util.common.Intervals;
+import org.apache.druid.java.util.common.guava.Sequence;
+import org.apache.druid.java.util.common.guava.Sequences;
+import org.apache.druid.query.metadata.metadata.ColumnAnalysis;
+import org.apache.druid.query.metadata.metadata.SegmentAnalysis;
+import org.apache.druid.segment.column.ColumnType;
+import org.apache.druid.segment.join.JoinableFactory;
+import org.apache.druid.server.QueryLifecycleFactory;
+import org.apache.druid.server.SegmentManager;
+import org.apache.druid.server.coordination.DruidServerMetadata;
+import org.apache.druid.server.coordination.ServerType;
+import org.apache.druid.server.security.Escalator;
+import org.apache.druid.sql.calcite.planner.PlannerConfig;
+import org.apache.druid.sql.calcite.schema.DruidSchema;
+import org.apache.druid.timeline.DataSegment;
+import org.apache.druid.timeline.SegmentId;
+import org.apache.druid.timeline.partition.LinearShardSpec;
+import org.easymock.EasyMock;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.concurrent.TimeUnit;
+
+@State(Scope.Benchmark)
+@Fork(value = 1)
+@Warmup(iterations = 10)
+@Measurement(iterations = 25)
+public class DruidSchemaAddSegmentBenchmark
+{
+ @Param({"1000"})
+ private int iterations;
+
+ private DruidSchemaForBenchmark druidSchema;
+ private DruidServerMetadata serverMetadata;
+ private DataSegment dataSegment;
+
+ private static class DruidSchemaForBenchmark extends DruidSchema
+ {
+ public DruidSchemaForBenchmark(
+ final QueryLifecycleFactory queryLifecycleFactory,
+ final TimelineServerView serverView,
+ final SegmentManager segmentManager,
+ final JoinableFactory joinableFactory,
+ final PlannerConfig config,
+ final Escalator escalator,
+ final BrokerInternalQueryConfig brokerInternalQueryConfig
+ )
+ {
+ super(
+ queryLifecycleFactory,
+ serverView,
+ segmentManager,
+ joinableFactory,
+ config,
+ escalator,
+ brokerInternalQueryConfig
+ );
+ }
+
+
+ @Override
+ public void addSegment(final DruidServerMetadata server, final DataSegment segment)
Review comment:
is this method needed?
##########
File path: sql/src/main/java/org/apache/druid/sql/calcite/schema/DruidSchema.java
##########
@@ -877,7 +881,7 @@ int getTotalSegments()
private static RowSignature analysisToRowSignature(final SegmentAnalysis analysis)
{
- final RowSignature.Builder rowSignatureBuilder = RowSignature.builder();
+ final RowSignature.Builder rowSignatureBuilder = RowSignature.builder(); // Intern here
Review comment:
what do we need to intern here?
##########
File path: benchmarks/src/test/java/org/apache/druid/benchmark/DruidSchemaAddSegmentBenchmark.java
##########
@@ -0,0 +1,196 @@
+/*
+ * 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.benchmark;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+import org.apache.druid.client.BrokerInternalQueryConfig;
+import org.apache.druid.client.TimelineServerView;
+import org.apache.druid.java.util.common.Intervals;
+import org.apache.druid.java.util.common.guava.Sequence;
+import org.apache.druid.java.util.common.guava.Sequences;
+import org.apache.druid.query.metadata.metadata.ColumnAnalysis;
+import org.apache.druid.query.metadata.metadata.SegmentAnalysis;
+import org.apache.druid.segment.column.ColumnType;
+import org.apache.druid.segment.join.JoinableFactory;
+import org.apache.druid.server.QueryLifecycleFactory;
+import org.apache.druid.server.SegmentManager;
+import org.apache.druid.server.coordination.DruidServerMetadata;
+import org.apache.druid.server.coordination.ServerType;
+import org.apache.druid.server.security.Escalator;
+import org.apache.druid.sql.calcite.planner.PlannerConfig;
+import org.apache.druid.sql.calcite.schema.DruidSchema;
+import org.apache.druid.timeline.DataSegment;
+import org.apache.druid.timeline.SegmentId;
+import org.apache.druid.timeline.partition.LinearShardSpec;
+import org.easymock.EasyMock;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.concurrent.TimeUnit;
+
+@State(Scope.Benchmark)
+@Fork(value = 1)
+@Warmup(iterations = 10)
+@Measurement(iterations = 25)
+public class DruidSchemaAddSegmentBenchmark
Review comment:
We should be benchmarking refreshSegments method since that is where we run segment metadata queries and build row signature.
##########
File path: sql/src/main/java/org/apache/druid/sql/calcite/schema/DruidSchema.java
##########
@@ -691,7 +695,7 @@ private long recomputeIsRealtime(ImmutableSet<DruidServerMetadata> servers)
if (segmentId == null) {
log.warn("Got analysis for segment[%s] we didn't ask for, ignoring.", analysis.getId());
} else {
- final RowSignature rowSignature = analysisToRowSignature(analysis);
+ final RowSignature rowSignature = analysisToRowSignature(analysis); // Intern here
Review comment:
```suggestion
final RowSignature rowSignature = analysisToRowSignature(analysis);
```
##########
File path: benchmarks/src/test/java/org/apache/druid/benchmark/DruidSchemaAddSegmentBenchmark.java
##########
@@ -0,0 +1,196 @@
+/*
+ * 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.benchmark;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+import org.apache.druid.client.BrokerInternalQueryConfig;
+import org.apache.druid.client.TimelineServerView;
+import org.apache.druid.java.util.common.Intervals;
+import org.apache.druid.java.util.common.guava.Sequence;
+import org.apache.druid.java.util.common.guava.Sequences;
+import org.apache.druid.query.metadata.metadata.ColumnAnalysis;
+import org.apache.druid.query.metadata.metadata.SegmentAnalysis;
+import org.apache.druid.segment.column.ColumnType;
+import org.apache.druid.segment.join.JoinableFactory;
+import org.apache.druid.server.QueryLifecycleFactory;
+import org.apache.druid.server.SegmentManager;
+import org.apache.druid.server.coordination.DruidServerMetadata;
+import org.apache.druid.server.coordination.ServerType;
+import org.apache.druid.server.security.Escalator;
+import org.apache.druid.sql.calcite.planner.PlannerConfig;
+import org.apache.druid.sql.calcite.schema.DruidSchema;
+import org.apache.druid.timeline.DataSegment;
+import org.apache.druid.timeline.SegmentId;
+import org.apache.druid.timeline.partition.LinearShardSpec;
+import org.easymock.EasyMock;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.concurrent.TimeUnit;
+
+@State(Scope.Benchmark)
+@Fork(value = 1)
+@Warmup(iterations = 10)
+@Measurement(iterations = 25)
+public class DruidSchemaAddSegmentBenchmark
+{
+ @Param({"1000"})
+ private int iterations;
+
+ private DruidSchemaForBenchmark druidSchema;
+ private DruidServerMetadata serverMetadata;
+ private DataSegment dataSegment;
+
+ private static class DruidSchemaForBenchmark extends DruidSchema
+ {
+ public DruidSchemaForBenchmark(
+ final QueryLifecycleFactory queryLifecycleFactory,
+ final TimelineServerView serverView,
+ final SegmentManager segmentManager,
+ final JoinableFactory joinableFactory,
+ final PlannerConfig config,
+ final Escalator escalator,
+ final BrokerInternalQueryConfig brokerInternalQueryConfig
+ )
+ {
+ super(
+ queryLifecycleFactory,
+ serverView,
+ segmentManager,
+ joinableFactory,
+ config,
+ escalator,
+ brokerInternalQueryConfig
+ );
+ }
+
+
+ @Override
+ public void addSegment(final DruidServerMetadata server, final DataSegment segment)
+ {
+ super.addSegment(server, segment);
+ }
+
+ @Override
+ protected Sequence<SegmentAnalysis> runSegmentMetadataQuery(Iterable<SegmentId> segments)
+ {
+ return Sequences.simple(
+ Lists.transform(
+ Lists.newArrayList(segments),
+ (segment) -> new SegmentAnalysis(
+ segment.toString(),
+ ImmutableList.of(segment.getInterval()),
+ ImmutableMap.of(
+ "col1",
+ new ColumnAnalysis(
+ ColumnType.STRING,
+ null,
+ false,
+ false,
+ 40,
+ null,
+ null,
+ null,
+ null
+ ),
+ "col2",
+ new ColumnAnalysis(ColumnType.LONG, null, false, false, 40, null, null, null, null),
+ "col2",
Review comment:
this is the same key that has been used before
##########
File path: sql/src/main/java/org/apache/druid/sql/calcite/schema/DruidSchema.java
##########
@@ -893,7 +897,8 @@ private static RowSignature analysisToRowSignature(final SegmentAnalysis analysi
rowSignatureBuilder.add(entry.getKey(), valueType);
}
- return rowSignatureBuilder.build();
+ return ROW_SIGNATURE_INTERNER.intern(rowSignatureBuilder.build());
+ // return rowSignatureBuilder.build();
Review comment:
this should be removed.
##########
File path: sql/src/main/java/org/apache/druid/sql/calcite/schema/DruidSchema.java
##########
@@ -791,7 +795,7 @@ DruidTable buildDruidTable(final String dataSource)
} else {
tableDataSource = new TableDataSource(dataSource);
}
- return new DruidTable(tableDataSource, builder.build(), null, isJoinable, isBroadcast);
+ return new DruidTable(tableDataSource, ROW_SIGNATURE_INTERNER.intern(builder.build()), null, isJoinable, isBroadcast);
Review comment:
we are unlikely to see much advantage of interning this signature since it is stored one per table.
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