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https://issues.apache.org/jira/browse/DRILL-6310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16525934#comment-16525934
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ASF GitHub Bot commented on DRILL-6310:
---------------------------------------
Ben-Zvi commented on a change in pull request #1324: DRILL-6310: limit batch
size for hash aggregate
URL: https://github.com/apache/drill/pull/1324#discussion_r198698608
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/record/RecordBatchMemoryManager.java
##########
@@ -201,6 +201,10 @@ public static int adjustOutputRowCount(int rowCount) {
return (Math.min(MAX_NUM_ROWS, Math.max(Integer.highestOneBit(rowCount) -
1, MIN_NUM_ROWS)));
}
+ public static int computeOutputRowCount(int batchSize, int rowWidth) {
+ return adjustOutputRowCount(RecordBatchSizer.safeDivide(batchSize,
rowWidth));
Review comment:
BTW, `safeDivide` uses `Math.ceil()`, so it may return a number one bigger
than the actual division. E.g., safeDivide(15, 2) = 8 , not 7. But probably
the `- 1` in the adjustment above fixes that issue.
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> limit batch size for hash aggregate
> -----------------------------------
>
> Key: DRILL-6310
> URL: https://issues.apache.org/jira/browse/DRILL-6310
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Flow
> Affects Versions: 1.13.0
> Reporter: Padma Penumarthy
> Assignee: Padma Penumarthy
> Priority: Major
> Fix For: 1.14.0
>
>
> limit batch size for hash aggregate based on memory.
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