Re: Logging parallel worker draught

On Mon, Jun 8, 2026 at 12:47 PM Benoit Lobréau
<benoit(dot)lobreau(at)dalibo(dot)com> wrote:
>
> This is the v11 of the patch (rebase).

Hi,

I tested the latest v11 patch series on the current master.
Before applying the patches, I was able to reproduce the worker
shortage scenario by running a parallel query that planned 2 workers
but launched only 1 worker. The EXPLAIN ANALYZE output showed:
Workers Planned: 2
Workers Launched: 1
I then applied:
v11-0001-Add-a-guc-for-parallel-worker-logging.patch
v11-0002-Implements-logging-for-parallel-worker-usage-in-util.patch
v11-0003-Implements-logging-for-parallel-worker-usage-in-quer.patch
The patches applied cleanly, but PostgreSQL failed to build.The build
errors indicate that log_parallel_workers,
log_parallel_workers_options, LOG_PARALLEL_WORKERS_NONE, and
LogParallelWorkersIfNeeded() are referenced during compilation but
could not be found, resulting in build failures in several files
including execMain.c, vacuumparallel.c, nbtsort.c, brin.c, and
gininsert.c.
Because of the build failure, I was unable to proceed with runtime testing.
Could you please clarify if there is any additional patch that needs
to be applied, or if I may have missed any step while testing?

Regards,
Solai