"Valery Bondarenko" <to_undead(at)mail(dot)ru> writes:
> When the cluster performs a massive disk operations (like nightly
> vacuuming or smth)
> I offten got such error in log file:
> 2005-11-12 14:52:29 LOG: could not fsync segment 0 of relation
> 1663/17735/210608: Permission denied
> It looked like as if somebody (not postgres) got an exclusive access to
> that file.
We've heard reports of various "antivirus" products doing that sort of
thing ... what third-party software do you have installed?
regards, tom lane