tustvold commented on code in PR #6382:
URL: https://github.com/apache/arrow-datafusion/pull/6382#discussion_r1198002865
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datafusion/core/src/physical_plan/sorts/sort.rs:
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@@ -55,6 +55,9 @@ use tempfile::NamedTempFile;
use tokio::sync::mpsc::{Receiver, Sender};
use tokio::task;
+/// How much memory to reserve for performing in-memory sorts
+const EXTERNAL_SORTER_MERGE_RESERVATION: usize = 10 * 1024 * 1024;
Review Comment:
I'm not a massive fan of this, but this somewhat patches around the issue
that once we initiate a merge we can't then spill
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