Re: corrupted item pointer:???

On 4/13/06, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> "hubert depesz lubaczewski" <depesz(at)gmail(dot)com> writes:
> > On 4/13/06, Richard Huxton <dev(at)archonet(dot)com> wrote:
> >> Hmm - I believe that means a data/index block was corrupted.
> > indices were recreated (reindex table), so i think this is data related
> > problem.
> AFAICS, the only non-index-related occurrence of that error message
> is in PageRepairFragmentation, which is invoked by VACUUM. I'd say
> it indicates a real problem and you shouldn't ignore it. You might
> try using pg_filedump or some such to examine the table and see if
> there's anything obvious about what happened to the corrupted page.
>

i'm not familiar with this utility.
i can of course find it using google, but how do i check what is wrong?
i am even willing to upload the dump file, but with 4 milion records in
table, it is going to be rather large...
pg_relation_size says that the table is about 3g i size

depesz