Re: [HACKERS] Proper cleanup at backend exit

> Bruce Momjian <maillist@candle.pha.pa.us> writes:
> >> [ should we work harder to ensure pg_listener entries get cleaned out? ]
>
> > Seems like we should try and clean them out, especially when the backend
> > is doing a normal exit.  In a panic exit, we don't need to clean it out.
>
> OK, I will add some more code to try to cope with the exit-during-
> uncommitted-transaction case.
>
> > We can install something into proc_exit() and shmem_exit() to clean out
> > the table.
>
> The old code inserted the cleanup action into shmem_exit().  Is that the
> right list to put it in?  I'm not clear on the difference between
> shmem_exit and proc_exit lists...

proc_exit is triggered on every backend exit.  shmem_exit is for
postmaster exit, or postmaster shared memory reset.

>
> > You can have a global variable that installed the pg_listen
> > cleaner the first time a notify() is done so as not to install a new
> > exit handler for each notify() call.
>
> That part's already done.

Cool.

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