Jean Arnaud <Jean(dot)Arnaud(at)inrialpes(dot)fr> writes:
> Is there a relation between database size and PostGreSQL restart duration ?
No.
> Does anyone now the behavior of restart time ?
It depends on how many updates were applied since the last checkpoint
before the crash.
If you're talking about startup of a cleanly-shut-down database, it
should be pretty much constant time.
regards, tom lane