Please look at the following Mysql table: http://pastebin.com/b0NDSbdz
I've partitioned the table by
sent_at and I'm making sure that most of the queries pass
sent_at. do I need to include
sent_at in all of the indexes?
do you spot any potential redundant indexes?
when I do include the
sent_at in the indexes, does it have to be the first field in the index declaration?