Question

I added this line to my.ini

wait_timeout=2000000

When I type

show global variables

It prints wait_timeout=2000000,

but when I type

show variables

It prints wait_timeout=28800

I can set with

set wait_timeout=2000000

But I do not want to set it all the time manually.

Do you have any suggestion to set permanently session system variable?

Answer 1

You probably need to check the interactive_timeout is set also – regular client connections are probably picking up your new setting, but when you check it manually using an interactive client, MySQL will set the timeout from this setting:

On thread startup, the session
wait_timeout value is initialized from
the global wait_timeout value or from
the global interactive_timeout value,
depending on the type of client (as
defined by the CLIENT_INTERACTIVE
connect option to
mysql_real_connect()). See also
interactive_timeout.

See manual for details.