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mysql root@localhost:(none)> show variables like '%max_connections%'; #查看mysql最大链接数
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| max_connections | 151   |
+-----------------+-------+
1 row in set
Time: 0.017s
mysql root@localhost:(none)> set global max_connections=1000; #将最大链接修改成1000
Query OK, 0 rows affected
Time: 0.001s
mysql root@localhost:(none)> show variables like '%max_connections%'; #再次查看
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| max_connections | 1000  |
+-----------------+-------+