Hi Guys, we are Litespeed customers for about two years now and have currently 3 VPSs running with 4.0.15 Version of litespeed. Yesterday we upgraded one server to 4.0.16 and faced the problem of very slow loading websites ... !! Even a switch back to the 4.0.15 version was a solution ... slow page loading. We switched to apache and it was instantly up to 5 times faster ! We tried about all solutions mentioned here in the forum: MySQL optimization and repair (which speeded up also the sites now under Apache server) php rebuilding (we running 5.2.14, 5.3.x is not an option yet) PHP suEXEC Max Conn changed to 20 or 25 suexec off eaccelerator on and off /tmp folder check (type and if it is full) Nothing helps ... !! The VPS has by far enough resources with 8-cores and 4GB guaranteed ram for about 120 client accounts. We can not find the issue here! Also there is no error log in /usr/local/lsws/logs .... only access.log and a ap_cmd_param.log which shows nothing unusual ! The error.log from /usr/local/lsws/admin/logs shows us: Please help us the server is in production and the clients are busy ... !!