I have just moved domain registrars and hosting companies. I got the registrar info switched, the database backed up and imported, all of the files downloaded and then uploaded to the new server, got the DNS NameServer records pointed to the new server and everything... I try to go to my site and I get an error saying Unable to connect to the database. So I edit the site.php file in the config folder. I changed the DB_SERVER, DB_USERNAME, DB_PASSWORD, and DB_DATABASE. I left the BASE_URL, DIR_REL, and PASSWORD_SALT alone. Now I can view my site again. The problem I am having is that my site is going extremely slow now and it also shows a couple of warnings at the bottom of the page, and I can't log in to edit the site. The site address ishttp://www.centralcec.com if you want to take a look at it. These are the warnings at the bottom of the page:
Warning: Unknown: open(/var/php_sessions/sess_cacd9eee3a1645c6cfba16dc2064c4e6, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/php_sessions) in Unknown on line 0


Do these errors have anything to do with maybe permissions to certain files that were changed maybe? Any help is greatly appreciated.

Thanks