loezix - this was the problem, somehow the utcomp make lag under windows 7 32bit
I'm almost certain that this message is echoed by utcomp, thereis no "server tick lag" log message in the sdk.
Maybe that is echoed because utcomp is a beta, - but there are no documents about it ...
btw: after an hardware upgrade, my server only shows the message when it's idle, tickrate 10: ScriptLog: server tickrate: 9 +/- 0%
I run the server with tickrate at 60, but it's a dedicated quad (linux).
I have enough time to check the workaround about the problem, but bad news, removing the utcomp mutator just removed the system status messages in the command promt window, the lag exist under Win7 32bit.