The change was made, literally, about 15 minutes ago. This inquiry has been open for some time, and this change has been in consideration for some time. There may be side effects from the change (not lag related) that we are looking at. It is important that you please give more time in this regard. The problem with the MyISAM implementation that this forum software uses by default is that it lacks row level locking on tables. This means that entire tables can become locked when they are in use. By converting the tables to InnnoDB, this change alleviates serious performance problems that are well known on large database-driven sites. I would ask for more patience in this regard, as the database is currently being monitored by an entire team of database administrators for speed optimization at this time. I will not have more pertinent information until I get feedback from them.
Also: The DBA team is the only one at our managed hosting provider that doesn't work 24/7. So until business hours are open there will be a wait to see what results we are looking at. I am noticing a significant performance improvement, but I am also on an extremely fast connection. I do not know what other connection types people are on, but this should improve things in the interim, most definitely. We will be skipping a non-essential maintenance release of the forum software until version 4.1 is released, which include profile customization and other features. This change that has been made today will likely have far reaching impact that is, even right now, having data collection taking place.
Thanks,
Michael