Originally Posted by
TXCharlie
You may try doubling or tripling the Web & Database server's memory, since memory sticks are so cheap these days. That may fix as many problems as moving it to a faster server.
It almost acts like a database table or page locking issue, since it often runs into a delay when posting messages.
...
I don't know what type of database server vBulletin uses, but this is pretty common in Microsoft SQL Server when we suddenly get a lot more users, unless the software and database force row locking to prevent escalliting it to Page Locking or Table Locking. Database tuning is almost an art, one that I have only limited success in solving sometimes.