This is my numbers. df ~/pradeep_test/pg_upgrade_testing/postgres_11.4/master ~/pradeep_test/pg_upgrade_testing/postgres_14/new_pg Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/nvme0n1p4_crypt 375161856 102253040 270335920 28% /home /dev/mapper/nvme0n1p4_crypt 375161856 102253040 270335920 28% /home
On Wed, Jun 28, 2023 at 3:14 PM Peter Eisentraut <pe...@eisentraut.org> wrote: > On 28.06.23 08:24, Laurenz Albe wrote: > > On Wed, 2023-06-28 at 11:49 +0530, Pradeep Kumar wrote: > >> I was under the impression that the --link option would create hard > links between the > >> old and new cluster's data files, but it appears that the entire old > cluster data was > >> copied to the new cluster, resulting in a significant increase in the > new cluster's size. > > > > Please provide some numbers, ideally > > > > du -sk <old_data_directory> <new_data_directory> > > I don't think you can observe the effects of the --link option this way. > It would just give you the full size count for both directories, even > though the point to the same underlying inodes. > > To see the effect, you could perhaps use `df` to see how much overall > disk space the upgrade step eats up. > >
