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ASF GitHub Bot commented on DRILL-6644: --------------------------------------- Ben-Zvi commented on a change in pull request #1409: DRILL-6644: Don't reserve space for incoming probe batches unnecessarily during the build phase. URL: https://github.com/apache/drill/pull/1409#discussion_r206370742 ########## File path: exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinMemoryCalculatorImpl.java ########## @@ -391,7 +391,7 @@ private void calculateMemoryUsage() // probe batch we sniffed. // TODO when batch sizing project is complete we won't have to sniff probe batches since // they will have a well defined size. - reservedMemory = incompletePartitionsBatchSizes + maxBuildBatchSize + maxProbeBatchSize; + reservedMemory = incompletePartitionsBatchSizes + maxBuildBatchSize + probeSizePredictor.getBatchSize(); Review comment: While experimenting, I noticed that the size of the incoming probe-side batch is **not** charged to the hash-Join allocator's available memory (basically I set the available memory to zero before the next() call, and never got an OOM). So is this addition needed ? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > In Some Cases The HashJoin Memory Calculator Over Reserves Memory For The > Probe Side During The Build Phase > ----------------------------------------------------------------------------------------------------------- > > Key: DRILL-6644 > URL: https://issues.apache.org/jira/browse/DRILL-6644 > Project: Apache Drill > Issue Type: Improvement > Reporter: Timothy Farkas > Assignee: Timothy Farkas > Priority: Major > > There are two cases where the HashJoin Memory calculator over reserves memory: > 1. It reserves a maximum incoming probe batch size during the build phase. > This is not really necessary because we will not fetch probe data until the > probe phase. We only have to account for the data received during > OK_NEW_SCHEMA. > 2. https://issues.apache.org/jira/browse/DRILL-6646 -- This message was sent by Atlassian JIRA (v7.6.3#76005)