修改租户级配置

ALTER SYSTEM SET param_name = expr 
     [COMMENT 'text'] 
     [SCOPE = conf_scope] 
     [TENANT = ‘tenantname’]

打开&关闭迁移复制

• 打开/关闭迁移开关

ALTER SYSTEM SET ENABLE_REBALANCE = {‘true’|’false’} [TENANT=‘tenantname’];

• 打开/关闭复制开关

ALTER SYSTEM SET ENABLE_REREPLICATION= {‘true’|’false’} [TENANT=‘tenantname’];