Re: straightening out backend process startup

On Mon, Aug 2, 2021 at 12:41 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> - AuxiliaryProcessMain() is used for two independent tasks: Start bootstrap /
> checker mode and starting auxiliary processes. In HEAD there's maybe 5 lines
> out 250 that are actually common to both uses.
>
> A related oddity is that we reserve shared memory resources for bootstrap &
> checker aux processes, despite those never existing.
>
> This is addressed in patches 1-7

This all looks pretty mechanical and, I would guess, not very controversial.

> - The order of invocation of InitProcess()/InitAuxiliaryProcess() and
> BaseInit() depends on EXEC_BACKEND. Due to that there often is no single
> place initialization code can be put if it needs any locks.
>
> This is addressed in patches 8-9
>
> - PostgresMain() has code for single user and multi user interleaved, making
> it unnecessarily hard to understand what's going on.
>
> This is addressed in patches 10

This stuff I'd need to study more in order to have an intelligent opinion.

--
Robert Haas
EDB: http://www.enterprisedb.com