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[FEA] Auto-tuner can consider using Velox scan if needed. #1570

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viadea opened this issue Mar 4, 2025 · 1 comment

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? - Needs Triage feature request

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viadea commented Mar 4, 2025

I wish Auto-tuner can consider using Velox svan if needed. This feature is there since 25.02GA.

viadea added ? - Needs Triage feature request labels

winningsix commented Mar 4, 2025

On T4, there're 3 cases we could consider:

GPU scan OOM: typically it's due to high compression ratio in decompression or decode. For that case, hybrid scan can bring benefits.
Little data remained after applying filter: Saying 1/10. hybrid scan helps here.
GPU heavy: If we noticed very high semaphore wait, it would be helpful to offload GPU scan onto CPU.

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