Re: POC: Parallel processing of indexes in autovacuum

Hi,

On Fri, May 16, 2025 at 4:06 AM Matheus Alcantara
<matheusssilv97(at)gmail(dot)com> wrote:
> I've reviewed the v1-0001 patch, the build on MacOS using meson+ninja is
> failing:
> ❯❯❯ ninja -C build install
> ninja: Entering directory `build'
> [1/126] Compiling C object
> src/backend/postgres_lib.a.p/utils_misc_guc_tables.c.o
> FAILED: src/backend/postgres_lib.a.p/utils_misc_guc_tables.c.o
> ../src/backend/utils/misc/guc_tables.c:3613:4: error: incompatible
> pointer to integer conversion initializing 'int' with an expression of
> type 'void *' [-Wint-conversion]
> 3613 | NULL,
> | ^~~~
>

Thank you for reviewing this patch!

> It seems that the "autovacuum_reserved_workers_num" declaration on
> guc_tables.c has an extra gettext_noop() call?

Good catch, I fixed this warning in the v2 version.

>
> One other point is that as you've added TAP tests for the autovacuum I
> think you also need to create a meson.build file as you already create
> the Makefile.
>
> You also need to update the src/test/modules/meson.build and
> src/test/modules/Makefile to include the new test/modules/autovacuum
> path.
>

OK, I should clarify this moment : modules/autovacuum is not a normal
test but a sandbox - just an example of how we can trigger parallel
index autovacuum. Also it may be used for debugging purposes.
In fact, 001_autovac_parallel.pl is not verifying anything.
I'll do as you asked (add all meson and Make stuff), but please don't
focus on it. The creation of the real test is still in progress. (I'll
try to complete it as soon as possible).

In this letter I will divide the patch into 2 parts : implementation
and sandbox. What do you think about implementation?

--
Best regards,
Daniil Davydov