Re: parallel autovacuum: Propagate track_cost_delay_timing to parallel workers

Hi,

On Mon, Sep 28, 2026 at 9:12 PM Sami Imseih <samimseih(dot)pg(at)gmail(dot)com> wrote:
>
> > That said, I checked track_wal_io_timing and it reports the
> > accumulated timing even after the GUC is turned off, see
> > pgstat_count_io_op_time(). IIUC, what matters there is whether timing
> > was on when the start time was captured, not what it is at reporting
> > time. Looking at that, I would prefer reporting the remaining
> > accumulated time here too to make it complete.
>
> Fair enough.
>
> I guess this also fits better with the existing comment.
>
> ```
> /* Report any remaining cost-based vacuum delay time */
> ```
>
> > Also, +1 to rename track_delay_timing to GUC name.
>
> Done.
>
> v2 attached.

Thanks. v2 looks good to me. pgindent and tests are happy, and the
same patch applies on PG19 as well.

One nit, please feel free to ignore it. VacuumUpdateCosts() prints
yes/no for booleans, so on/off here could match that for consistency.
AFAICS, there is no hard rule, and I am fine with it as is.

--
Bharath Rupireddy
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