I am developing a server application, which uses mysql for some data storing. Should I create a connection to the mysql on the server's start and use it for all queries, or create connection on each query? Which is better/faster?
If you ask me, It's better to use only one connection, that way you can use session variables without any issues. Besides, with static variables, it's easy to permanently save the connection somewhere in the script.
来源：https://stackoverflow.com/questions/19345485/mysql-single-or-multiple-connections