Github user Ben-Zvi commented on a diff in the pull request:
https://github.com/apache/drill/pull/860#discussion_r124121514
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/xsort/MSortTemplate.java
---
@@ -92,8 +93,9 @@ public void setup(final FragmentContext context, final
BufferAllocator allocator
* @return
*/
public static long memoryNeeded(final int recordCount) {
- // We need 4 bytes (SV4) for each record.
- return recordCount * 4;
+ // We need 4 bytes (SV4) for each record, power of 2 rounded.
--- End diff --
Does the implementation of __memoryNeeded()__ in
SortRecordBatchBuilder.java also need to be similarly modified ?
And a minor comment: Would the name __memoryNeededForSV4()__ be more
descriptive ?
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