mysql> select @@port; +--------+ | @@port | +--------+ | 3318 | +--------+ 1 row in set (0.00 sec)
mysql> select @@datadir; +-----------------------------+ | @@datadir | +-----------------------------+ | /root/mysql/data/3318/data/ | +-----------------------------+ 1 row in set (0.00 sec)
mysql> select @@socket; +---------------------+ | @@socket | +---------------------+ | /tmp/mysql3318.sock | +---------------------+ 1 row in set (0.00 sec)
原文：https://www.cnblogs.com/gengyufei/p/14284569.html