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username: DDL for large tables in 4.x… seems like there’s no feature support, just a bunch of pitfalls… 
There are actually several ways to modify configurations, for example:
- File configuration
- In-memory configuration
- Global in-memory configuration
- Automatic loading configuration with tiup
Each corresponds to different scenarios and parameters…
As for the configuration of driner.toml, there are two ways to modify it:
- Through
tiup edit-config, by overriding parameters to replace the default values - By adjusting the configuration information in the local deploy directory’s toml to ensure successful loading, which is quite troublesome…
- Or by specifying a configuration file to make the configuration effective…
You can refer to this: