Hi Gavin,Thanks very much, I'll implement as many of your suggestions as
possible. The varchar(255)'s are inexcusable and I feel suitably ashamed :)
The queries were generated by ActiveRecord (an ORM library for Ruby),
although even if I had written them myself they would probably not be much
bette
Hi Ciaran,
So I think there's a couple things going on:
1. The explain plan for your "slow" query looks wrong, such as mysql is
confused. It's possible your index statistics are incorrect. Try ANALYZE
TABLE on listings and addresses.
I think a sure way to fix it is to add STRAIGHT_JOIN to f
