pingcap / pingcap/tiflash

Separate handle thread for SchemaSyncer

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Dominant language
C++
Stars
1k
Forks
423
Avg merge
1d 15h
Merged PRs (30d)
24

Description

Currently, both storage layer and SchemaSyncer use the Context::getBackgroundPool to handle tasks. And since there will be heavy tasks in storage layer, the tasks of SchemaSyncer could be delayed. It is better to use a different thread to handle tasks in SchemaSyncer.

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the storage layer and SchemaSyncer uses of Context::getBackgroundPool, then inspect how their tasks are scheduled. Done means SchemaSyncer tasks use a separate thread or pool and are no longer delayed by heavy storage-layer work; add coverage for the scheduling behavior if the existing test structure supports it.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
backend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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