Обсуждение: hard shut down of system

i am not able to start postmaster

actually i want to simulate, the scenario is which the user will do

I will first check the logfiles then the stale pid file.

On 4/12/06, surabhi.ahuja <surabhi.ahuja@iiitb.ac.in> wrote:
>
> if postmaster is running and i do,
>
> kill -9 -1
> i.e. i did abrupt shut down
>
> now when i brought back the system
>
> i am not able to start postmaster
>
> actually i want to simulate, the scenario is which the user will do
> 'hard shut down / Power off'
> while system is in working state..
>
> and i want to ensure that postmaster is able to recover from this kind of
> errors when
> the system is is brought up..
>
> how should i handle the above situation?
>
>


--
Jonel Rienton
mailto:jonel@rientongroup.com
powered by: google

"surabhi.ahuja" <surabhi.ahuja@iiitb.ac.in> writes:
> if postmaster is running and i do,
> kill -9 -1
> i.e. i did abrupt shut down

> i am not able to start postmaster

What happens exactly when you try --- what error messages does it print?
What method are you using to try to start the postmaster (pg_ctl,
some init script (whose), etc)?

The reasons I know about for failure to restart in this situation
include
* you forgot to kill all the postmaster child processes too;
* you didn't remove the shared memory segment and/or semaphores,
  and the system's SysV limits are too small to let a new postmaster
  create a whole duplicate set.
None of these things have anything to do with what happens in a real
system crash.

            regards, tom lane