Reclaiming space for dropped database

Hi all,

Our current development database server is running a bit low on diskspace,
so I dropped an old but rather large database with the intention of
claiming back some space. However, the space remains claimed.

This server was upgraded from PG10 to PG11 using pg_upgrade's --link
option.

I see this after having dropped the (300+GB) database:
-bash-4.2$ du -d 1 -h
4.0K ./.cache
0 ./.config
4.0K ./9.6
376G ./10
72G ./11
447G .

The files of that database apparently still exist within the ./10
directory:
-bash-4.2$ du -d 1 -h ./10/data/
4.1G ./10/data/pg_wal
816K ./10/data/global
0 ./10/data/pg_commit_ts
0 ./10/data/pg_dynshmem
8.0K ./10/data/pg_notify
0 ./10/data/pg_serial
0 ./10/data/pg_snapshots
208K ./10/data/pg_subtrans
0 ./10/data/pg_twophase
16K ./10/data/pg_multixact
372G ./10/data/base
0 ./10/data/pg_replslot
0 ./10/data/pg_tblspc
3.5M ./10/data/pg_stat
0 ./10/data/pg_stat_tmp
4.0K ./10/data/pg_logical
96K ./10/data/log
688K ./10/data/pg_xact
376G ./10/data/

How do I reclaim that space?

Regards,
Alban Hertroys

Alban Hertroys
D: +31 (0)53 4 888 888 | T: +31 (0)53 4888 888 | E: alban(dot)hertroys(at)apollovredestein(dot)com
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