I noticed that we started getting some larger spikes around about the time when the Omraziar guard patrols were introduced (not necessarily causation, could just be a coincidence in timing). Either I'm tripping or it seems to be getting worse lately, and has been particularly bad the past few days to a week. Today I've been logged in for around two hours and have already twice had the game lag so hard on an input that I expected a full server crash.
Once, I think, was caused by my use of the 'eavesdrop' command. It seems if you try to use that without a proper name, the game lags very badly. But I just used 'eavesdrop about today' which is a valid use case, so... I'm not sure.
All this could of course be unrelated, I'm just trying to put forward any information that might be useful to diagnosing and resolivng the issue. Has anybody else noticed anything that might be related to the lag spikes?