Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/19025#discussion_r134657758
--- Diff: core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
---
@@ -53,7 +53,7 @@
* retrieve the base object.
* <p>
* This allows us to address 8192 pages. In on-heap mode, the maximum page
size is limited by the
- * maximum size of a long[] array, allowing us to address 8192 * 2^32 * 8
bytes, which is
+ * maximum size of a long[] array, allowing us to address 8192 * 2^31 * 8
bytes, which is
--- End diff --
This is still wrong -- 2^31 - 1.
The amount of memory is more like 140TB, not 35.
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