可以通過命令行設置全局 或 會話的隔離級別。重啟或者退出會話失效
SET [SESSION | GLOBAL] TRANSACTION ISOLATION LEVEL {READ UNCOMMITTED | READ COMMITTED | REPEATABLE READ | SERIALIZABLE}具體命令
# 設置全局隔離級別
set global transaction isolation level REPEATABLE READ;
set global transaction isolation level READ COMMITTED;
set global transaction isolation level READ UNCOMMITTED;
set global transaction isolation level SERIALIZABLE;
#設置會話隔離級別
set session transaction isolation level REPEATABLE READ;
set session transaction isolation level READ COMMITTED;
set session transaction isolation level READ UNCOMMITTED;
set session transaction isolation level SERIALIZABLE;通過配置文件設置隔離級別
[mysqld]
transaction-isolation = REPEATABLE-READ
transaction-isolation = READ-COMMITTED
transaction-isolation = READ-UNCOMMITTED
transaction-isolation = SERIALIZABLE查看隔離級別
SELECT @@GLOBAL.transaction_isolation
SELECT @@SESSION.transaction_isolation
show variables like '%iso%';
從官方文檔粘貼下來的命令可能是因為格式原因執行就報錯 ，氣哭 (╬◣д◢)
但還是粘一下地址吧 https://dev.mysql.com/doc/refman/5.7/en/set-transaction.html