Alistair Kerr

On my server, with the same water pushing mob trap it is NOT caused by the redstone. If I remove the water buckets from the dispensers but leave the redstone connected and functioning I don't get the lag.

edit: I tried replacing the water buckets with arrows. No lag. I tried with lava. No lag (mind you, lava doesn't spread as far as water).

I tried changing the packed ice platforms for iron blocks (with water dispensed). Still lag.

So yes, it has something to with the water, not the redstone clocks.

I've narrowed down the issue to the mob farm that is situated near the witch farm. When I remove the repeater that links the timer on the mob farm to the dispensers etc. then I no longer get the issue. When however the repeater is in, then as I go around the witch farm (which is 128 or so blocks away) then I tend to get the problems.