Re: [HACKERS] Re: [COMMITTERS] pgsql: Perform only one ReadControlFile() during startup.

Andres Freund <andres@anarazel.de> writes:
> On 2017-09-19 13:00:33 -0400, Robert Haas wrote:
>> You mean, in the postmaster?

> Yes. We try to avoid touch shmem there, but it's not like we're
> succeeding fully. See e.g. the pgstat_get_crashed_backend_activity()
> calls (which do rely on shmem being ok to some extent), pmsignal,
> BackgroundWorkerStateChange(), ...

Well, the point is to avoid touching data structures that could be
corrupted enough to confuse the postmaster.  I don't have any problem with
adding some more functionality to pmsignal, say.
        regards, tom lane


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