Over the last 60 days the database has become defragmented — so much so that the average page load time has increased by about a half-second.
So, this was an opportunity to defragment the database the restart the server after some basic updates. No big deal, just down-time.
Thanks for your patience.
Summary: 110 minutes for the database optimizations this time. THR will be a bit slower than normal for the next 8-12 hours while the cache gets rebuilt, and then we should be a bit faster than before.