Memory optimization for empty tables and empty segments
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- Dominant language
- C++
- Stars
- 1k
- Forks
- 423
- Avg merge
- 1d 15h
- Merged PRs (30d)
- 24
Description
Enhancement
Currently, we don't clean the empty tables and empty segments thoroughly. Thus, there's a lot of completely useless memory after tiflash scaling-out or other normally region transfering.
In order to optimize the memory usage, we need to cut down the memory usage of empty tables and segments as possible as we can.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no files, tests, or entry points. Start by tracing how empty tables and segments are retained after scaling out or region transfers, then define measurable memory behavior before changing cleanup. Done means empty tables and segments no longer retain unnecessary memory.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- databases, performance
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100