能否具体说下是哪个config？
https://docs.pingcap.com/zh/tidb/stable/sql-statement-show-config/#show-config
https://docs.pingcap.com/zh/tidb/stable/tiup-component-cluster-edit-config#tiup-cluster-edit-config
https://docs.pingcap.com/zh/tidb/stable/information-schema-cluster-config#cluster_config