How to fix "Unable to establish database connection" error after moving site

Hello, I just moved a site from localhost where i was using to work unto my fully qualified hosting. I folowed all the steps in moving site to server documentary. created the database and dumped the sql backed up and created the tables. I also change all the parts .The site is running, front end is running and the admin as well is working but when I tried to edit a chunk or snippet, I got the error msg, Unable to establish database connection. Please where did I go wrong? What Can I do. Any tip is appreciated. Thanks

Did you re-rerun the installer in upgrade mode?

Are you on a super-inexpensive and busy shared server? DB connections can loose out on overloaded servers.

Hi rthrash, no I didnt re-run the installer in upgrade mode. And the server is not overloaded yet .Its a dedicated server with about 4 small sites and 2 big ones. However, when I checked to edit a chunk again, the error msg didnt come and it worked.
Could it be my internet connection? It could be way slow sometimes? Thanks as usual for the help.

It’s a good idea when moving sites to re-run the installer in upgrade mode (with all the resources unchecked so you don’t overwrite data) to rebuild your config file.

Oh ohh, so whats the implication of my not doing that? Performance issues? What am i to expect? The admin is working ok but I cant be so sure