MYSQL, very slow order by

Question

I have got two tables. One is a User table with a primary key on the userid and the other table references the user table with a foreign key.

The User table has only

Answer 1

Seems you're suffering from MySQL's inability to do late row lookups:

• MySQL ORDER BY / LIMIT performance: late row lookups
• Late row lookups: InnoDB

Try this:

SELECT  p.*, u.*
FROM    (
        SELECT  id
        FROM    photo
        ORDER BY
                uploaddate DESC, id DESC
        LIMIT   10
        OFFSET  100000
        ) pi
JOIN    photo p
ON      p.id = pi.id
JOIN    user u
ON      u.user_id = p.user_id