Because there is no way that we can provide step by step instructions around this, if you're having issues, you really need to consider hiring somebody who is capable of doing the work that you're not, when it comes to stuff like MySQL, failure to handle something properly can result in all of your data being lost, and who takes the blame on that? You also can't fix plugins leaking connections without fixing the code, and shamefully, there are too many plugins that use mysql improperly that this could actually be a real issue on your server. You have multiple issues here, 1. Your MySQL permissions are clearly broken - to fix this, you really need to get somebody to do it for you who knows what they're doing, nobody sane is going to pass you instructions which could be potentially dangerous and expose your server to the world for everybody to do what they wish, or instructions that could easily see you losing potentially all of your setup. 2. You more than likely have a plugin which is leaking connections if you're hitting that limit, or just have too many individual servers connecting to it, this needs to be looked into properly, once again, ideally by somebody who knows what they're doing. 3. if you bumped up the setting in that file from the default and *restarted* the mysql server, and are STILL running out of connections, number 2 is really likey a major issue; that's over 6x the default.