mysql> show status like 'Threads%'
-> ;
+-------------------+-------+
| Variable_name | Value |
+-------------------+-------+
| Threads_cached | 7 |
| Threads_connected | 16 | ##这个数值指的是打开的连接数
| Threads_created | 812 |
| Threads_running | 2 | ##这个数值指的是激活的连接数
+-------------------+-------+
4 rows in set
mysql> show variables like '%max_connections%';
+------------------------+-------+
| Variable_name | Value |
+------------------------+-------+
| max_connections | 1000 | 这是当前设置的最大连接数
| mysqlx_max_connections | 1000 |
+------------------------+-------+
2 rows in set
可以在/etc/my.cnf里面设置数据库的最大连接数
max_connections = 1000
