MySQL error in file: /engine/modules/show.full.php at line 41

Error Number: 23

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

SQL query:

SELECT * FROM dle_post LEFT JOIN dle_post_extras ON (dle_post.id=dle_post_extras.news_id) WHERE id = '23694'