A Database Error Occurred

Error Number: 23

Out of resources when opening file '/tmp/#sql_2a09_0.MAI' (Errcode: 24 "Too many open files")

SELECT `posts`.*, `categories`.`name` as `category_name`, `categories`.`color` as `category_color`, `users`.`username` as `username`, `users`.`slug` as `user_slug` FROM `posts` JOIN `users` ON `posts`.`user_id` = `users`.`id` JOIN `categories` ON `posts`.`category_id` = `categories`.`id` WHERE `posts`.`created_at` <= CURRENT_TIMESTAMP() AND `posts`.`visibility` = 1 AND `posts`.`status` = 1 ORDER BY `hit` DESC LIMIT 5

Filename: models/Post_model.php

Line Number: 103