Even with innodb_lazy_drop_table ON, we’re still seeing issues around DROP TABLE performance (version 5.5.28-29.1-log Percona Server). During an overnight maintenance, it took 9 minutes to drop an empty table (the table had been around 9.5GB in size, but had been cleared of all its data during an archive/delete before the drop, so had 0 rows).
I’ve seen a couple of bug reports (things like http://bugs.mysql.com/bug.php?id=51325 and http://bugs.mysql.com/bug.php?id=64284) but those are marked as closed with fixes as far back as 5.5.13 and 5.5.23, however the issue doesn’t seem to be any different for us over the entire 5.5 branch. Is there currently any known way to alleviate these issues? We perform quite a lot of online schema changes to large tables, and need to be able to drop these tables from the master without downtime to reclaim space.