MySQL error in file: /engine/init.php at line 393

Error Number: 23

The Error returned was:
Out of resources when opening file './u490846/dle_post.MYD' (Errcode: 24 - Too many open files)

SQL query:

SELECT category, COUNT(*) AS count FROM dle_post WHERE approve=1 AND date < '2024-05-01 07:14:08' GROUP BY category