Zdenek Kotala píše v po 24. 08. 2009 v 13:47 +0200:
> I tested Alvaro's patch and it works, because it does not lead to stack
> consumption, but it shows another bug in StartAutovacuumWorker() code.
> When fork fails bn structure is freed but
> ReleasePostmasterChildSlot() should be called as well. See error:
>
> 2009-08-24 11:50:20.360 CEST 3468 FATAL: no free slots in PMChildFlags array
>
> and comment in source code:
>
> /* Out of slots ... should never happen, else postmaster.c messed up */
>
Just a confirmation that Alvaro's patch+ReleasePostmasterChildSlot() fix
solves the problem and PostgreSQL survives well during a memory
shortages.
Zdenek