OpenTenBase / OpenTenBase/TXSQL
Parallel query issue
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- Dominant language
- C++
- Stars
- 337
- Forks
- 234
- PR merge metrics
- No merged PRs in 30d
Description
Hi, Hi, I encountered an issue during testing. Some data synchronization scenarios use order by limit, but I found that if parallel queries are enabled, the query takes 10x or more slower. I think it should be related to parallel scan, below is the reproduced image.
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Research direction
The report names no source file, test, or SQL reproduction; start by reproducing the order-by-limit workload with parallel queries enabled and disabled. Trace the parallel-scan path to identify the slowdown, then add regression coverage showing the affected query no longer incurs the reported performance loss.
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Assessment
- Tech stack
- cpp
- Domain
- databases, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100