Question on Update/Upgrade process

Server
,
1

Hello,

I have successfully done an upgrade from 9.0.0 to 9.1.8 but I have a question about upgrade process
Does it suppress some files (trash files and version files) ?

I have this question because my file system was

  • 61% full before Upgade and
    (/dev/mapper/vgdata-lv_data 818800000 493164956 325635044 61% /var/owncloud/data)
  • 51% full after upgrade
    ( /dev/mapper/vgdata-lv_data 818800000 414137536 404662464 51% /var/owncloud/data)

Thanks a lot