I just went to secondary with my first real lager, an Oktoberfest with WLP820. It was in primary, between 40-45 degrees, and when I got to 75% of the way to target FG, I let it warm up to clean up the diacetyl.
I just went to secondary tonight after a month in primary, and went from 1.064 to 1.012, so all seemed well. Wooohee! Smells like rotten eggs. Now, I know lager yeast can do that, but how long does it take to clean it up?