juice928 commented on PR #20159:
URL: https://github.com/apache/datafusion/pull/20159#issuecomment-3857499530
👋 Hi, I'm an automated AI code review bot. I ran some checks on this PR and
found **2 points that might be worth attention** (could be false positives,
please use your judgment):
1. <strong>Optimizing the frequency of disk flushing during spill
writes</strong>
-
[Location](https://github.com/apache/datafusion/blob/572cd33b9781b74ec698149d9f81f3c13904561d/datafusion/physical-plan/src/spill/spill_pool.rs#L197-L198):
`datafusion/physical-plan/src/spill/spill_pool.rs:L197-L198`
- Impact: Frequent manual flushing may bypass the benefits of buffering
and lead to performance overhead in spill-heavy workloads.
- Suggestion: Consider removing the explicit `flush()` call to allow the
internal buffering of the writer to handle efficiency more naturally.
2. <strong>Improving the synchronization between concurrent spill file reads
and writes</strong>
-
[Location](https://github.com/apache/datafusion/blob/572cd33b9781b74ec698149d9f81f3c13904561d/datafusion/physical-plan/src/spill/spill_pool.rs#L540-L544):
`datafusion/physical-plan/src/spill/spill_pool.rs:L540-L544`
- Impact: A reader might encounter an early EOF and terminate before the
writer finishes, potentially leading to incomplete data processing.
- Suggestion: Consider implementing a "tailing" mechanism for the reader
or ensuring the reader starts only after the writer has finalized the data
segment.
If you find these suggestions disruptive, you can reply "stop" , and I'll
automatically skip this repository in the future.
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