On Fri, Mar 25, 2022 at 11:11:46AM +0800, Julien Rouhaud wrote: > As an example, here's a POC for a new shmem_request_hook hook after > _PG_init(). > With it I could easily fix pg_wait_sampling shmem allocation (and checked that > it's indeed requesting the correct size).
Are you sure that the end of a release cycle is the good moment to begin designing new hooks? Anything added is something we are going to need supporting moving forward. My brain is telling me that we ought to revisit the business with GetMaxBackends() properly instead, and perhaps revert that. This solution makes me uneasy from the start (already stated upthread), because it is not a solution to the original problem, just a safeguard that handles one small-ish portion of the whole parameter calculation cycle. -- Michael
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