Look at the database server logs and see what actually was happening just before the server crashed... do you have the auto vacuuming running at backend? or was there some client making connection just when the server did crash? .... your db logs can actually help you here.
If you look at the beginning of the thread you'dve seen we're talking about HPUX here...
Maybe they have an OOM killer too? Although maybe it's quotas?
Have a nice day, -- Martijn van Oosterhout < kleptog@svana.org> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to litigate.