I was checking one disk space issue in PostgreSQL server and noticed that there are some folders which are not mapping to databases. I am not able to link those folders with any database oid. Can we safely delete those folders after shutting down the postgres? It is recommended to delete any files and directories in database directory but I need to clean
postgres=# select oid,datname from pg_database;
oid | datname
------------+----------------------
1 | template1
12998 | template0
13003 | postgres
1360816673 | demo1
876257363 | demo2
568075126 | db01
2888078676 | app05_06
2893858702 | app10
2858172588 | app03
2911598776 | demo_auto
2911908415 | production_auto
-bash-4.1$ pwd
/var/lib/pgsql/9.4/data/base
-bash-4.1$ ls -ltr
total 12716
drwx------ 2 postgres postgres 4096 Feb 19 2016 12998
drwx------ 2 postgres postgres 12288 Feb 28 21:00 1
drwx------ 2 postgres postgres 163840 Mar 19 18:18 2567078690
drwx------ 2 postgres postgres 237568 Mar 19 19:10 2567168798
drwx------ 2 postgres postgres 151552 Mar 19 19:19 2567176994
drwx------ 2 postgres postgres 172032 Mar 19 19:34 2567193375
drwx------ 2 postgres postgres 12288 Mar 19 19:34 13003
drwx------ 2 postgres postgres 110592 Apr 1 14:58 568075126
drwx------ 2 postgres postgres 73728 Apr 25 21:28 876257363
drwx------ 2 postgres postgres 4096 May 4 02:24 1360816673
drwx------ 2 postgres postgres 536576 Jun 7 02:28 2888078676
drwx------ 2 postgres postgres 81920 Jun 7 04:14 2911598776
drwx------ 2 postgres postgres 573440 Jun 7 07:10 2858172588
drwx------ 2 postgres postgres 258048 Jun 7 07:40 2911908415
drwx------ 2 postgres postgres 9859072 Jun 7 08:14 pgsql_tmp
drwx------ 2 postgres postgres 720896 Jun 7 08:35 2893858702
-bash-4.1$
postgres=# select version();
version
---------------------------------------------------------------------------------------------------------------
PostgreSQL 9.4.5 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16), 64-bit
(1 row)
postgres=# \! cat /etc/issue
CentOS release 6.7 (Final)
Kernel \r on an \m
Cheers,
Adarsh Sharma
