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From: Hannu Krosing <[email protected]>
To: Robert Haas <[email protected]>
Cc: Matthias van de Meent <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Jonathan S. Katz <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Let's make PostgreSQL multi-threaded
Date: Thu, 8 Jun 2023 17:02:08 +0200
Message-ID: <CAMT0RQTCFec0J4hQDcpC0CZ4F-7VWFZXpREgaRU-96bVQ1pj2Q@mail.gmail.com> (raw)
In-Reply-To: <CA+TgmoZhySzy4QuupAMCi3Fs7ZDwwKkUE9VEgxF2nn71Bo-FXQ@mail.gmail.com>
References: <[email protected]>
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	<CA+TgmoZhySzy4QuupAMCi3Fs7ZDwwKkUE9VEgxF2nn71Bo-FXQ@mail.gmail.com>

On Thu, Jun 8, 2023 at 4:56 PM Robert Haas <[email protected]> wrote:
>
> On Thu, Jun 8, 2023 at 8:44 AM Hannu Krosing <[email protected]> wrote:
> > > That sounds like a bad idea, dynamic shared memory is more expensive
> > > to maintain than our static shared memory systems, not in the least
> > > because DSM is not guaranteed to share the same addresses in each
> > > process' address space.
> >
> > Then this too needs to be fixed
>
> Honestly, I'm struggling to respond to this non-sarcastically. I mean,
> I was the one who implemented DSM. Do you think it works the way that
> it works because I considered doing something smart and decided to do
> something dumb instead?

No, I meant that this needs to be fixed at OS level, by being able to
use the same mapping.

We should not shy away from asking the OS people for adding the useful
features still missing.

It was mentioned in the Unconference Kernel Hacker AMA talk and said
kernel hacker works for Oracle, andf they also seemed to be needing
this :)

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  Subject: Re: Let's make PostgreSQL multi-threaded
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