"Orphaned" files after initdb

Maybe my thinking is just missing something obvious here. But looking
at a fresh initdb, I'm seeing a number of files in the data directory
for this database that don't have corresponding entries in pg_class. I
looked for entries based on relfilenode in pg_class - am I missing
some other way we put files in there?

I'm seeing the same on both head and 9.1 as an example, but different oids.

I feel I'm either missing something obvious, or we have a problem
here? And somehow the first one seems more likely..

The query I ran (yeah, i'm sure it can be written prettier, but this
was quick-n-dirty):

with t as (  select  * from pg_ls_dir('<datadir>/base/1') l(f)  where f not in (       select relfilenode::text from
pg_class      union all select relfilenode::text || '_vm' from pg_class       union all select relfilenode::text ||
'_fsm'from pg_class)
 
)
select f,          size,          modification
from t, pg_stat_file('<datadir>/base/1/' || f)
order by 1;

Which gives me:       f        |  size  |      modification
-----------------+--------+------------------------11809           |  65536 | 2013-04-01 20:34:45+0211809_fsm       |
24576| 2013-04-01 20:34:45+0211809_vm        |   8192 | 2013-04-01 20:34:45+0211811           |  16384 | 2013-04-01
20:34:45+0211812          |  32768 | 2013-04-01 20:34:45+0211821           | 344064 | 2013-04-01 20:34:45+0211821_fsm
   |  24576 | 2013-04-01 20:34:45+0211821_vm        |   8192 | 2013-04-01 20:34:45+0211823           | 131072 |
2013-04-0120:34:45+0211824           |  90112 | 2013-04-01 20:34:45+0211825           | 507904 | 2013-04-01
20:34:45+0211825_fsm      |  24576 | 2013-04-01 20:34:45+0211825_vm        |   8192 | 2013-04-01 20:34:45+0211827
   |      0 | 2013-04-01 20:34:45+0211829           |   8192 | 2013-04-01 20:34:45+0211830           |  73728 |
2013-04-0120:34:45+0211831           | 196608 | 2013-04-01 20:34:45+0211832           |  65536 | 2013-04-01
20:34:45+0211832_fsm      |  24576 | 2013-04-01 20:34:45+0211832_vm        |   8192 | 2013-04-01 20:34:45+0211834
   |  16384 | 2013-04-01 20:34:45+0211835           |  32768 | 2013-04-01 20:34:45+02pg_filenode.map |    512 |
2013-04-0120:34:45+02PG_VERSION      |      4 | 2013-04-01 20:34:44+02
 
(24 rows)



The filenode map and pg_version obviously make sense, but where are
the others from?

-- Magnus HaganderMe: http://www.hagander.net/Work: http://www.redpill-linpro.com/