I got this email several times from SMF what type of problem is this? i found my forum is running good except spamming on the forum Should I contact to my hosting provider
if your forum is still running, then thats a host issue. occasionally mysql will cough and sputter then all is well. if it persists, contact your host.
As you know forums need lot of connections to the database. If you are on shared hosting this is very common. Ask your hosting company if they can increase the query execution time for your account, that should take care of most of those messages.