Re: Fix stats reporting delays in logical parallel apply worker - Mailing list pgsql-hackers

On Fri, Apr 17, 2026 at 8:31 AM Zhijie Hou (Fujitsu)
<houzj.fnst@fujitsu.com> wrote:
>
> When implementing another feature, I noticed that parallel apply workers
> currently do not report statistics while idle in their main loop. This can cause
> stats from the last processed transaction to be arbitrarily delayed, especially
> when there are long gaps between streamed transactions.
>
> The issue is demonstrated in 0002, where a TAP test fails when attempting to
> collect stats from a parallel apply worker that has no subsequent transaction to
> trigger a stats report.
>
> 0001 fixes this issue by forcing a stats report when the worker is idle in the
> main loop, matching the behavior already present in LogicalRepApplyLoop() for
> regular logical apply workers.
>

LGTM. We should backpatch this change.

--
With Regards,
Amit Kapila.