RE: Monitoring DB size

Slightly different approach than you might expect. For larger DBs you'd likely want to exclude base and instead use pg_database_size() in addition.

postgres(2454884) =# create temp table xx(dir text, sz bigint);          
CREATE TABLE
Time: 2.587 ms
postgres(2454884) =# copy xx(sz, dir) from program 'du -s *';                          
COPY 21
Time: 3.793 ms
postgres(2454884) =# select * from xx;                          
        dir          |  sz    
----------------------+-------
base                 | 26280
global               |   568
pg_commit_ts         |    12
pg_dynshmem          |     4
pg_logical           |    16
pg_multixact         |    28
pg_notify            |     4
pg_replslot          |     4
pg_serial            |     4
pg_snapshots         |     4
pg_stat              |     4
pg_stat_tmp          |     4
pg_subtrans          |    12
pg_tblspc            |     4
pg_twophase          |     4
PG_VERSION           |     4
pg_wal               | 16392
pg_xact              |    12
postgresql.auto.conf |     4
postmaster.opts      |     4
postmaster.pid       |     4
(21 rows)

Time: 0.282 ms

On Mon, Jul 15, 2024 at 4:42 PM Shenavai, Manuel <manuel.shenavai@sap.com> wrote: