| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Re: [COMMITTERS] pgsql: Perform only one ReadControlFile() during startup. |
| Date: | 2017-09-19 17:15:28 |
| Message-ID: | 19645.1505841328@sss.pgh.pa.us |
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Andres Freund <andres(at)anarazel(dot)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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