"Edoardo Ceccarelli" <eddy@axa.it> writes:
> pg_dump: ERROR: could not access status of transaction 1629514106
> DETAIL: could not open file "pg_clog/0612": No such file or directory
This looks like a data corruption problem to me. It may or may not be
significant that 1629514106 = 0x6120697a = ASCII 'zi a' (or 'a iz' if
you are on a big-endian machine). That looks at least a little bit
plausible for Italian text, so I'm wondering if your disk drive or OS
has hiccuped and dumped a sector or two of some other file into your
database :-(. We've seen it happen before.
Check the archives for past discussions about locating and recovering
from corrupted data.
regards, tom lane
