How to set the `lease` parameter in TiDB?

The lease parameter (--lease=60) is set from the command line when starting a TiDB server. The value of the lease parameter impacts the Database Schema Changes (DDL) speed of the current session. In the testing environments, you can set the value to 1s for to speed up the testing cycle. But in the production environments, it is recommended to set the value to minutes (for example, 60) to ensure the DDL safety.