Error establishing a database connection

My WordPress site hosted at http://www.bodhi.org.sg/ suddenly went down with error message:

Error establishing a database connection

Below is the output from curl:

$ curl -I http://www.bodhi.org.sg/
HTTP/1.1 500 Internal Server Error
Date: Fri, 30 Jan 2009 13:20:46 GMT
Server: Apache/2.0.61 (Unix) PHP/4.4.7 mod_ssl/2.0.61 OpenSSL/0.9.7e
X-Powered-By: PHP/5.2.6
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
Pragma: no-cache
Last-Modified: Fri, 30 Jan 2009 13:20:46 GMT
Connection: close
Content-Type: text/html; charset=utf-8

Any idea what's wrong? Any help will be appreciated. Thanks Dreamhost. :)

Cheers,
Leong

I checked out the site and it looks fine...if you do see the problem please reply to this thread right away and I'll check it out again.

Thanks Thingee for your attention. You were right. The problem went away without my intervention, but now it's back. I see the error message "Error establishing a database connection" when I try to access http://www.bodhi.org.sg/.

Curl shows "HTTP/1.1 500 Internal Server Error":

HTTP/1.1 500 Internal Server Error
Date: Mon, 02 Feb 2009 07:24:44 GMT
Server: Apache/2.0.61 (Unix) PHP/4.4.7 mod_ssl/2.0.61 OpenSSL/0.9.7e
X-Powered-By: PHP/5.2.6
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
Pragma: no-cache
Last-Modified: Mon, 02 Feb 2009 07:24:44 GMT
Connection: close
Content-Type: text/html; charset=utf-8

And here's how the DNS config looks like:

$ host www.bodhi.org.sg
www.bodhi.org.sg is an alias for wordpress.dreamhost.com.
wordpress.dreamhost.com has address 208.97.187.233

Thanks.
Leong

Edited by leong on 02/01/09 11:30 PM (server time).

Thanks for the report. I've been trying to get the admin to narrow down the problem with the mysql servers with these cases.