Re: tuplesort: unexpected end of data

Hi!
A different error today:
[MemoryContextAlloc: invalid request size 4294967295]
This is a more often (twice a week) error and I don't understand 
why?...
I'm verifying the machine: fsck (with bad blocks chk), ... but no
hardware problems untill now.

--------------------------------info------------------------------------
$ pg_config --version
PostgreSQL 7.2.1

$ cat /etc/redhat-release 
Red Hat Linux release 7.2 (Enigma)

$/var/log/pgsql (excerpt)
(...)
Jun 11 03:06:04 srv31 postgres[13914]: [3403] ERROR:  cannot open segment 1 of relation n_gram (target block 528325):
Nosuch file or directory
 
(...)
Jun 11 04:26:12 srv31 postgres[14972]: [3317] DEBUG:  recycled transaction log file 00000020000000F6
Jun 11 04:26:12 srv31 postgres[14972]: [3318] DEBUG:  recycled transaction log file 00000020000000F7
Jun 11 04:26:12 srv31 postgres[14972]: [3319] DEBUG:  recycled transaction log file 00000020000000F8
Jun 11 04:28:56 srv31 postgres[14983]: [3317] DEBUG:  recycled transaction log file 00000020000000F9
Jun 11 04:28:56 srv31 postgres[14983]: [3318] DEBUG:  recycled transaction log file 00000020000000FA
Jun 11 04:28:56 srv31 postgres[14983]: [3319] DEBUG:  recycled transaction log file 00000020000000FB
Jun 11 03:29:07 srv31 postgres[13913]: [3383] ERROR:  MemoryContextAlloc: invalid request size 4294967295
Jun 11 03:29:07 srv31 postgres[13913]: [3384] NOTICE:  Error occurred while executing PL/pgSQL function set_n_gram
Jun 11 03:29:07 srv31 postgres[13913]: [3385] NOTICE:  line 9 at select into variables
(...)
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--    o__        Bem haja,   _.>/ _            NunoACHenriques  (_) \(_)            ~~~~~~~~~~~~~~~
http://students.fct.unl.pt/users/nuno/