On one of our mysql databases the size on disk is way larger (28GB) than the actual data (~5GB) so I had a closer look to the files contained in mysql-data
I see the following files
12K #sql-5254_eaa3.frm 8.9G #sql-5254_eaa3.ibd 12K #sql-537f_8d5b.frm 11G #sql-537f_8d5b.ibd
The above remain even after mysql restart, server reboot etc
Any idea if these are temporary tables that survived e.g. a crash? on a production system is it safe to just remove them or do I need to handle them in a different way?
By the way we do have file_per_table set to true.
thanks in advance for any hints!