BUG #4096: PG 8.3.1. confused about remaining disk space

The following bug has been logged online:

Bug reference: 4096
Logged by:
Email address: j6m(at)adm(dot)estp(dot)fr
PostgreSQL version: 8.3.1
Operating system: Linux
Description: PG 8.3.1. confused about remaining disk space
Details:

I ran today a legacy application with PG 8.3.1 on a test machine.

The DB is some ~30 MB. Default tables do have OIDs and BLCKSZ is set
system-wide to 16384 (because of another DB).

A lot of messages like these do appear wich tend to indicate PG 8.3.1 is
confused. This set of SQL scripts used to run from PG 7.0.3 to PG 8.2.6 with
no problem.

WARNING: could not create relation-cache initialization file
"base/19693/pg_internal.init.29329": No space left on device
DETAIL: Continuing anyway, but there's something wrong.
create temp table param0 (max0 date, datelb date) : ERROR: could not create

relation 1663/19693/634161: No space left on device
row number 0 is out of range 0..-1
row number 0 is out of range 0..-1
WARNING: could not create relation-cache initialization file
"base/19693/pg_internal.init.29330": No space left on device
DETAIL: Continuing anyway, but there's something wrong.
create temp table param0 (max0 date, datelb date) : ERROR: could not create

relation 1663/19693/634162: No space left on device
row number 0 is out of range 0..-1
row number 0 is out of range 0..-1

Disk saturation, you think ? No at all, as in the meantime :

Filesystem Size Used Avail Use% Mounted on
/dev/sda3 9.9G 8.5G 874M 91% /
udev 125M 88K 125M 1% /dev
/dev/sda1 54M 15M 37M 29% /boot
/dev/sda4 8.3G 7.4G 966M 89% /home
/dev/sdb1 38G 31G 7.2G 81% /var/lib/pgsql

As you can see, there is some 200 times the active DB size that remains
available.