max_user_connections error and now 500 errors
Older site. Front end uses all mysqli, but backend is old and was still using mysql. Client started getting a 'max_user_connections' error this AM. Suspect based upon some other things password for DB connection may have been compromised. Updated passwords and changed connection from pconnect to connect, as suggested in other threads.
Appeared to be working fine, but now on some update pages, getting a 500 error when trying to update data. Page loads fine so it's connecting to the database upon load, but freezes. Adding error reporting code doesn't return anything.
Front end that uses mysqli works fine... until I freeze in the backend with the dataassist pages, then site won't load even the home page.
PHP version is 5.5.36.
I'm sure this is really vague, but looking for some troubleshooting direction.