Re: BUG #17370: shmem lost on segfault

Ok, thanks.

What I should do in this case (postmaster restarts my background
worker and shared memory is lost)?
When I storage in bgw_extra field - everything is ok (with restarting
after segfault), but it size too small.

ср, 19 янв. 2022 г. в 14:28, Julien Rouhaud <rjuju123@gmail.com>:
>
> Hi,
>
> On Wed, Jan 19, 2022 at 03:05:56AM +0000, PG Bug reporting form wrote:
> > The following bug has been logged on the website:
> >
> > Bug reference:      17370
> > Logged by:          RekGRpth
> > Email address:      rekgrpth@gmail.com
> > PostgreSQL version: 14.1
> > Operating system:   docker alpine
> > Description:
> >
> > In developing my https://github.com/RekGRpth/pg_task I found strange
> > behavior of shared memory segment.
>
> This is not a postgres bug.  If you need help with developing an extension you
> should send a message to -hackers.
>
> That being said, in case of unclean shutdown (which happens if a process
> segfaults), the postmaster will restart and any shared memory will be lost, so
> I'm assuming that you somehow serialize a handle which isn't valid anymore
> after a restart, unclean or not.