MySQLdb is extremely slow with large result sets

Question

I executed the following query both in phpMyAdmin & MySQLdb (python).

SELECT *, (SELECT CONCAT(`id`, \'|\', `name`, \'|\', `image_code`)
FROM `model_arti         


        

Answer 1

PHPMyAdmin places a limit on all queries so you don't return large result sets in the interface. So if your query normally returns 1,000,000 rows, and PHPMyAdmin reduces that to 1,000 (or whatever the default is), then you would have to expect a lot longer processing time when Python grabs or even queries the entire result set.

Try placing a limit in Python that matches the limit on PHPMyAdmin to compare times.