"Reimer" <carlosreimer@terra.com.br> writes:
> pg_dump: ERROR: could not access status of transaction 1768711534
> DETAIL: could not open file "/usr/local/pgsql/data/pg_clog/0696": =
> Arquivo ou dire
> t=F3rio n=E3o encontrado
> How is the best way to fix? pg_resetxlog?
resetxlog won't help: you've got corrupt data in that table. See the
archives for previous threads about finding and removing corrupt rows.
I concur with the nearby suggestion that you should be running something
newer than 7.4.6, but even with an update you'll still be needing to
clean up this corruption manually :-(
regards, tom lane