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全局系统变量(例如:https ://docs.pingcap.com/tidb/stable/system-variables)可以在启动之前在文件系统(例如:tidb.toml)上设置还是只能通过客户端设置?
例如: set @@global.tidb_distsql_scan_concurrency = 10
set @@global.tidb_distsql_scan_concurrency = 10
全局变量存储在 TiKV 中。系统变量表在首次引导 TiDB 时初始化。在启动之前没有办法设置它。