例如,要取消保存的全局max_connections配置选项,可以运行以下命令: SETPERSISTGLOBALmax_connections=NULL; 1. 总结 在MySQL 8中,SET PERSIST命令允许将会话级别的配置选项永久保存到配置文件中,以便在数据库重启后仍然生效。这个功能对于配置管理和自动化非常有用,因为它允许我们在数据库重启后不必手动重新配置选项
例如,在某些托管环境中,您不具有文件系统访问权限,您拥有的只是能够连接到一台或多台服务器。至于SET GLOBAL你需要超级特权SET PERSIST。 还有RESET PERSIST命令。该RESET PERSIST命令具有从持久化配置中除去配置变量的语义,从而将其转换为具有类似的行为SET GLOBAL。 MySQL 8.0允许SET PERSIST设置大多数只读变量,新值将...
and thus can be reconfigured while the server is running. For example: mysql> SET GLOBAL sql_mode='STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION'; We should support being able to persist these changes through a server restart. For example: mysql> SET PERSIST sql_mode='STRICT_TRANS_TABLES,NO_EN...
MySQL 的设置可以在运行时通过 SET GLOBAL 命令来更改,但是这种更改只会临时生效,到下次启动时数据库又会从配置文件中读取。 MySQL 8 新增了 SET PERSIST 命令,例如: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SET PERSIST max_connections = 500; MySQL 会将该命令的配置保存到数据目录下的 mysqld-...
系统变量分为全局系统变量(需要添加global关键字)以及会话系统变量(需要添加session关键字),有时也把全局系统变量简称为全局变量,有时也把会话系统变量称为local变量。如果不写,默认会话级别。静态变量(在 MySQL 服务实例运行期间它们的值不能使用set动态修改)属于特殊的全局系统变量。
Description:This statement: set persist general_log=on; generates an entry in $DATADIR/mysqld-auto.cnf { "mysql_server": {"general_log": "ON" } } However, when we restart the server, the variable general_log is still 0. mysql [localhost] {msandbox} ((none)) > select @@general_lo...
There is also the RESET PERSIST command. The RESET PERSIST command has the semantic of removing the configuration variable from the persist configuration, thus converting it to have similar behavior as SET GLOBAL. MySQL 8.0 allows SET PERSIST to set most read-only variables as well, the new val...
<add name="InventoryEntities" connectionString="metadata=res://*/InventoryModel.csdl|res://*/InventoryModel.ssdl|res://*/InventoryModel.msl;provider=MySql.Data.MySqlClient;provider connection string="server=127.0.0.1;user id=root;password=sa123456;persistsecurityinfo=True;Character Set=utf8;data...
36. Can MySQL NDB Cluster Manager persist configuration data across restarts?A: Yes. All MySQL NDB Cluster configuration information and process identifiers are persisted to disk, enabling them to survive system failures or re-starts of the MySQL NDB Cluster Manager....
However, this just generates a random UUID on server start, and does not persist it to a file. MySQL Docs: https://dev.mysql.com/doc/refman/8.0/en/replication-options.html#sysvar_server_uuid Fixes dolthub/dolt#74312301: fix coalesce type() Although only the first argument is returned, ...