| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "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 17:08:21 |
| Message-ID: | 20170919170821.drrwlt6wcoytlgup@alap3.anarazel.de |
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| Lists: | pgsql-committers pgsql-hackers |
On 2017-09-19 13:00:33 -0400, Robert Haas wrote:
> On Tue, Sep 19, 2017 at 12:51 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> > That'd not be that a crazy amount of
> > shared memory that'd need to be touched in shared memory, ...
>
> 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(), ...
Greetings,
Andres Freund
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