I'm trying to get persistent connections working with php mysqli. The connections are persistent alright, but not all clean-up seems to be run when the persistent connection 'closes':
https://www.php.net/manual/en/mysqli.persistconns.php
It says locks with GET_LOCK() get released, but for my combination of apache/php-fpm, the locks created with GET_LOCK() linger forever.
Has anyone encountered this problem and found a solution?