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[HUDI-283] : Ensure a sane minimum for merge buffer memory (#964)

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- Some environments e.g spark-shell provide 0 for memory size
- This causes unnecessary performance degradation
This commit is contained in:
vinoth chandar
2019-10-20 21:00:04 -07:00
committed by GitHub
parent ed745dfdbf
commit dfdc0e40e1
2 changed files with 16 additions and 6 deletions
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14
hudi-client/src/main/java/org/apache/hudi/config/HoodieMemoryConfig.java
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@@ -40,8 +40,10 @@ public class HoodieMemoryConfig extends DefaultHoodieConfig {
public static final String MAX_MEMORY_FRACTION_FOR_COMPACTION_PROP = "hoodie.memory.compaction.fraction";
// Default max memory fraction during compaction, excess spills to disk
public static final String DEFAULT_MAX_MEMORY_FRACTION_FOR_COMPACTION = String.valueOf(0.6);
// Default memory size per compaction (used if SparkEnv is absent), excess spills to disk
public static final long DEFAULT_MAX_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES = 1024 * 1024 * 1024L; // 1GB
// Default memory size (1GB) per compaction (used if SparkEnv is absent), excess spills to disk
public static final long DEFAULT_MAX_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES = 1024 * 1024 * 1024L;
// Minimum memory size (100MB) for the spillable map.
public static final long DEFAULT_MIN_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES = 100 * 1024 * 1024L;
// Property to set the max memory for merge
public static final String MAX_MEMORY_FOR_MERGE_PROP = "hoodie.memory.merge.max.size";
// Property to set the max memory for compaction
@@ -91,6 +93,12 @@ public class HoodieMemoryConfig extends DefaultHoodieConfig {
return this;
}
public Builder withMaxMemoryMaxSize(long mergeMaxSize, long compactionMaxSize) {
props.setProperty(MAX_MEMORY_FOR_MERGE_PROP, String.valueOf(mergeMaxSize));
props.setProperty(MAX_MEMORY_FOR_COMPACTION_PROP, String.valueOf(compactionMaxSize));
return this;
}
public Builder withMaxMemoryFractionPerCompaction(double maxMemoryFractionPerCompaction) {
props.setProperty(MAX_MEMORY_FRACTION_FOR_COMPACTION_PROP, String.valueOf(maxMemoryFractionPerCompaction));
return this;
@@ -136,7 +144,7 @@ public class HoodieMemoryConfig extends DefaultHoodieConfig {
double maxMemoryFractionForMerge = Double.valueOf(maxMemoryFraction);
double userAvailableMemory = executorMemoryInBytes * (1 - memoryFraction);
long maxMemoryForMerge = (long) Math.floor(userAvailableMemory * maxMemoryFractionForMerge);
return maxMemoryForMerge;
return Math.max(DEFAULT_MIN_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES, maxMemoryForMerge);
} else {
return DEFAULT_MAX_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES;
}

8
hudi-client/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java
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@@ -193,9 +193,11 @@ public class HoodieMergeHandle<T extends HoodieRecordPayload> extends HoodieWrit
private String init(String fileId, Iterator<HoodieRecord<T>> newRecordsItr) {
try {
// Load the new records in a map
logger.info("MaxMemoryPerPartitionMerge => " + config.getMaxMemoryPerPartitionMerge());
this.keyToNewRecords = new ExternalSpillableMap<>(config.getMaxMemoryPerPartitionMerge(),
config.getSpillableMapBasePath(), new DefaultSizeEstimator(), new HoodieRecordSizeEstimator(originalSchema));
long memoryForMerge = config.getMaxMemoryPerPartitionMerge();
logger.info("MaxMemoryPerPartitionMerge => " + memoryForMerge);
this.keyToNewRecords = new ExternalSpillableMap<>(memoryForMerge,
config.getSpillableMapBasePath(), new DefaultSizeEstimator(),
new HoodieRecordSizeEstimator(originalSchema));
} catch (IOException io) {
throw new HoodieIOException("Cannot instantiate an ExternalSpillableMap", io);
}