On 2019-09-04 16:59, Tom Lane wrote:
>> A related point, perhaps we should change the key printed into
>> postmaster.pid to be in hexadecimal format ("0x08x") so that it matches
>> what ipcs prints.
> Hmm, that depends on whose ipcs you use :-(. A quick survey
> of my machines says it's
>
> key shmid
>
> Linux: hex decimal
> FreeBSD: decimal decimal
> NetBSD: decimal decimal
> OpenBSD: decimal decimal
> macOS: hex decimal
> HPUX: hex (not printed)
>
> There's certainly room to argue that hex+decimal is most popular,
> but I'm not sure that that outweighs possible compatibility issues
> from changing postmaster.pid contents. (Admittedly, it's not real
> clear that anything would be paying attention to the shmem key,
> so maybe there's no compatibility issue.)
Let's just leave it decimal then. At least then it's easier to compare
it to ls -i output.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
