hi roger, thank you for the fast answer...
but the problem is whlie the query with the long duration is running the auto reload time will be increased. and after the long query is executed the auto reload is still about 600 seconds. that means the next keep alive query is sent after 10minutes which is definitly to late to keep the session alive.
while the long query is running, it is not necessary to execute the keep alive query because while the long query is executed the connections is still alive. but after the long query it is necessary that the keep alive query is executed every minute, so that the connection always stay alive.
so is it possible to reset the auto reload time to 1 minute after the query with the long duration is completed?
im sorry about my explaination, i hope its no to hard to understand :-) as you see, im no an english geek!
but thank you for the patience and help..