MYSQL performance slow using filesort

Question

I have a simple mysql query, but when I have a lot of records (currently 103,0000), the performance is really slow and it says it is using filesort, im not sure if this is w

Answer 1

I have two suggestions. First, remove the quotes around the zero in your where clause. That line should be:

price >= 0

Second, create this index:

CREATE INDEX `helper` ON `adverts`(`status`,`approved`,`price`,`date_created`);

This should allow MySQL to find the 10 rows specified by your LIMIT clause by using only the index. Filesort itself is not a bad thing... the number of rows that need to be processed is.