Number of database connections

I’m having issues with a PHP site that keeps using up all the database connections and I have to keep rebooting our mysql PS to clear it up.

It’s not using mysql_pconnect (persistent connections).
It’s not using fcgi (although it was doing it with fcgi as well).

I’ve tried increasing the RAM on our mysql PS to the maximum, no change.

No word back from support yet, wondering if anyone else has this issue.