Github user Geek-He commented on a diff in the pull request:
https://github.com/apache/spark/pull/19025#discussion_r134664599
--- Diff: core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
---
@@ -74,7 +74,7 @@
* Maximum supported data page size (in bytes). In principle, the
maximum addressable page size is
* (1L << OFFSET_BITS) bytes, which is 2+ petabytes. However, the
on-heap allocator's
* maximum page size is limited by the maximum amount of data that can
be stored in a long[]
- * array, which is (2^32 - 1) * 8 bytes (or 16 gigabytes). Therefore, we
cap this at 16 gigabytes.
+ * array, which is (2^31 - 1) * 8 bytes (or 16 gigabytes). Therefore, we
cap this at 16 gigabytes.
--- End diff --
(2^31-1)*8 = 17179869176 Bytes = 17179869176/1024/1024/1024 â 16GB, "or
about 16GB" should not wrong.
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