emergency after core update mysql uses 100% cpu
Installation and Configuration
I think you've got things in a bit of a mess - here's what I would do:
1) Put your site in maintenance mode so you don't have people hitting pages and lists on your site
2) Make sure you are not running a repair from the browser (repair.php) OR the command line
3) restart MySQL
4) log in to your site and do an Integrity Check with repair modules checked. This could take a bit to run if you have very large tables - i.e. give it 30 minutes if needed
5) when finished exit maintenance mode
updated by @brian: 08/30/17 10:27:50AM