Contentdatabase took 6 hours to mount in 2016 envirounment
we have migrated 2010 to 2013 one database which holds one site, but when we mount back in 2016 it took 6 hours where it tool it less than 30 minutes in 2013
why it happened?
size for that site collection in that db is 86 GB, that db holds one site, is size causing the delay?
what could be other reasons? Please clarify

Hi Wang,