Thanks, I tought about that as well but with PG7.X we had the same machine with the same database running smoothly for more than a year
now strange things like this are happening:
2006-12-18 14:49:35 CET [14691] : LOG: server process (PID 13421) wasterminated by signal 11
2006-12-18 14:49:35 CET [14691] : LOG: terminating any other active serverprocesses
2006-12-18 14:49:35 CET [14009] db idle: WARNING: terminating connection because of crash of another server process
2006-12-18 14:49:35 CET [14009] db idle: DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
2006-12-18 14:49:35 CET [14009] db idle: HINT: In a moment you should be able to reconnect to the database and repeat your command.
I bet a crashing process could cause that data corruption, right?
On 12/18/06, Tom Lane <tgl@sss.pgh.pa.us > wrote:"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