mySQL is a performance devil if you’re using it on your localhost or LAN. But using it on internet as a remote storage server is not mean the performance you got will performance you got in your localhost or LAN.

If you want me to sample it with an absolute ratio i can clearly say that if you’re getting 100% performance in your localhost or LAN you’ll get 15% performance while you’re connecting remote mySQL server over tcp/ip.

There is a one configuration that you can increase performance about 5 to 15 percent. That’s to disable name resolving on mySQL. You can do this by adding a line in your mySQL config (my.cnf or my.ini) after [mysqld] line (if you’re using mysqld standart daemon) : skip-name-resolve

You can test it if you want. This will make move your remote connection performance from 15% to 20 to 30%.

But infact this performance increasement will not fit your needs. It’s still so slow for me to use it. Thus please think twice if you’re willing to use mySQL as a remote database server for your client applications. ( Yeah but still it rocks on localhost or LAN )

You can check how mySQL uses DNS resolve from this document. ( Document mirror on focus on code (16KB) )