It's clear that you have some major database problems and the current system cannot deal with the pounding load of maximum logged-in users. But when the load is low, then SL seems to work just fine.
It would seem that the best possible thing that we residents can do to help LL, is to not use SL during the peak-usage times and try to spread out our usage to other low-load times during the week to reduce your peak load.
This makes thr SL experience better for me because during off-peak usage the database isn't stressed out, and by moving my usage to a different time period it'd make SL run better for those who are only able to login during the peak-usage time.
But I haven't found any graphs yet that show exactly what times of the day throughout the week that your load is the highest and lowest. Are these graphs available somewhere?
(If you've ever seen MRTG/RRD graphs you know what I'm referring to.)