Set transaction isolation level

http://www.cnblogs.com/moss_tan_jun/p/5753327.html

 

There are 2 ways to set transaction isolation level in MySQL:

1 Set in my.cnf, set as follows in the mysqld option

[mysqld]

 transaction-isolation = READ-COMMITTED

 

2 Reset with the set command in the mysql window

[sql]  view plain copyprint?   

1. mysql> set global tx_isolation='REPEATABLE-READ';  
2. Query OK, 0 rows affected (0.01 sec)  
3.    
4. mysql>  

To query the current session transaction level, use:

[sql]  view plain copyprint?   

1. mysql> select @@tx_isolation;  
2. +----------------+  
3. | @@tx_isolation |  
4. +----------------+  
5. | READ-COMMITTED |  
6. +----------------+  
7. 1 row in set (0.00 sec)  
8.    
9. mysql>  

 

To query the global transaction isolation level, you can use

[sql]  view plain copyprint?   

1. mysql> select @@global.tx_isolation;  
2. +-----------------------+  
3. | @@global.tx_isolation |  
4. +-----------------------+  
5. | READ-COMMITTED        |  
6. +-----------------------+  
7. 1 row in set (0.00 sec)  
8.    
9. mysql>