Error 1021:
Disk full (/tmp/#sql_2de_0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")

On query:
SELECT SQL_CALC_FOUND_ROWS t2.title as title, t2.image as file FROM images as t2, id_table_imgcategory_img as t3 WHERE table_name="actor" AND id_table =446 AND t2.id=t3.id_images ORDER BY RAND() LIMIT 3