We are currently upgrading the database server to 48 GB of memory, which also means we have to upgrade the operating system, too.
Should be done in about an hour.
OK, this is complete. Our database server not only has 48 GB of memory installed, but has access to all of that memory. Finally.
And just for fun, here's a picture of our fourth server, which will be used to run superuser.com -- as with our earlier servers, there's an inscription on the top. I dedicated 4 and 5 to Jarrod and Geoff, respectively.