mysql 全局变量和SESSION变量

mysql> SET query_cache_size = 40000;
ERROR 1229 (HY000): Variable 'query_cache_size' is a GLOBAL variable and should be set with SET GLOBAL


mysql> show variables like '%commit%';
+--------------------------------+-------+
| Variable_name                  | Value |
+--------------------------------+-------+
| autocommit                     | ON    |
| binlog_order_commits           | ON    |
| innodb_api_bk_commit_interval  | 5     |
| innodb_commit_concurrency      | 0     |
| innodb_flush_log_at_trx_commit | 1     |
+--------------------------------+-------+
5 rows in set (0.01 sec)

mysql> set autocommit=0;
Query OK, 0 rows affected (0.00 sec)

mysql>  show variables like '%commit%';
+--------------------------------+-------+
| Variable_name                  | Value |
+--------------------------------+-------+
| autocommit                     | OFF   |
| binlog_order_commits           | ON    |
| innodb_api_bk_commit_interval  | 5     |
| innodb_commit_concurrency      | 0     |
| innodb_flush_log_at_trx_commit | 1     |
+--------------------------------+-------+
5 rows in set (0.01 sec)

mysql> quit
Bye
You have new mail in /var/spool/mail/root
test:/root# mysql -uroot -p'kjk123' 


mysql>  show variables like '%commit%';
+--------------------------------+-------+
| Variable_name                  | Value |
+--------------------------------+-------+
| autocommit                     | ON    |