MySQL 5.6.10 on Windows 7.
I'm cleaning up and paring down a large INNODB table. Its .ibd file is originally 22 gigs. While I was in the middle of an ALTER, dropping some columns, the mysqld.exe process died.
Upon restarting and starting up mysqld, I noticed a lot of disk activity (~10mb/s) from mysqld, that has been going on for around 15 minutes so far. Also, in my data folder, there are files with names like "#sql-7b8_3.frm".
Could someone shed light on what's going on?