Hi,
On 2023-11-08 16:03:53 +0100, Siegfried Kiermayer wrote:
> we do run kernel 5.8 and the allocation happens basically at start.
>
> I would still expect postgres to fail gracefully at this point?
>
> Is 'throwing an error message' / checking the allocation a performance
> issue? is it in a generic hotpath for allocation?
It's not like we're ignoring an error and just continuing - we're successfully
allocating the memory. Then the kernel sends SIGBUS when accessing the freshly
allocated memory.
We could try to install a SIGBUS handler and erroring out that way. But doing
that correctly and portably is not exactly trivial.
Greetings,
Andres Freund
