MGR变量group_replication_primary_member
2019-11-06 16:11
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组复制的状态变量只有一个,目前在8.0.17这个版本上还是存在的,未来会被废弃掉,我们在单主的模式下,可以用来查看哪个节点是读写节点。
mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2087 Server version: 8.0.17 MySQL Community Server - GPL Copyright (c) 2009-2019 Percona LLC and/or its affiliates Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show status like 'group_replication_primary_member'; +----------------------------------+--------------------------------------+ | Variable_name | Value | +----------------------------------+--------------------------------------+ | group_replication_primary_member | 1fb894d8-e752-11e9-a0a1-00505687032a | +----------------------------------+--------------------------------------+ 1 row in set (0.00 sec) group_replication_primary_member Shows the primary member's UUID when the group is operating in single-primary mode. If the group is operating in multi-primary mode, shows an empty string. The group_replication_primary_member status variable has been deprecated and is scheduled to be removed in a future version.
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