[Max Taxable]

Are you on a shared server? It could be someone else's website that's causing the problem. Have you contacted your host?

it is what the error message says: the database cannot accept more connections, all connection slots are in use otherwise. Several things to check:
-- is your own application OK? Does your application open persistent connections, which aren't closed? Use mysql_connect() instead of mysql_pconnect() unless you have a good reason to do so.
-- have you got more users then ever? I can't see stats when I go to your board. Are you being flooded with bots?
-- can you increase the max_connections system variable, or has it been increased up to its end already (its default value is 100)?
-- Have you looked in the manual for further details:
[dev.mysql.com...]

If it is your own server, then you can look into these things and try to fix and correct.
If you are on shared hosting, you need your host to fix this -- perhaps other shared hosting customers started to eat up more connections than they should ... (common hosting error: too many customers on one box ...) This can be the result of a DDoS attack either on you or a site that is sharing the hosting with you.

Cloud Flare can block the attacks if they are coming to you. First thing I would do (and did) is block China - this is where the Baidu bots come from, you don't need them indexing your site, and their behavior is quite aggressive. They show up with 100s of bots at a time and stay for hours. They totally ignore robots.txt. You can block others too, you should start watching the traffic in online.php for floods. Block bad actors.

Here's what your board looks like at Web Page Test:

http://www.webpagetest.org/result/120111_78_2TNP4/