Re: [PATCH] Fix memory leak in pgstat_progress_parallel_incr_param()

Hi,

good find, and thanks for the patches!

>   0001: drop the redundant initStringInfo() call (backport candidate)

This one looks like an obvious fix to me.

>   0002: allocate the static buffer once per process via
>         pq_beginmessage_reuse / pq_endmessage_reuse, to avoid the
>         per-call allocation (master only)

I am less convinced this will have any benefits for the additional complexity.
The callers of pgstat_progress_parallel_incr_param() are not frequent enough
to make a measurable difference here. cost delay reporting for parallel workers
is throttled by PARALLEL_VACUUM_DELAY_REPORT_INTERVAL_NS and
index progress reporting does not happen very frequently either.

--
Sami Imseih
Amazon Web Services (AWS)