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help / color / mirror / Atom feedFrom: Andres Freund <[email protected]>
To: Matthias van de Meent <[email protected]>
Cc: Hannu Krosing <[email protected]>
Cc: Robert Haas <[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 11:48:48 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAEze2WiM9XTCbp4K5sGt0udzSPqmEmxPVKOv7EagG8u3Vbya6A@mail.gmail.com>
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Hi,
On 2023-06-08 17:55:57 +0200, Matthias van de Meent wrote:
> While I agree that "sharing page tables across processes" is useful,
> it looks like it'd be much more effort to correctly implement for e.g.
> DSM than implementing threading.
> Konstantin's diff is "only" 20.1k lines [0] added and/or modified,
> which is a lot, but it's manageable (13k+ of which are from files that
> were auto-generated and then committed, likely accidentally).
Honestly, I don't think this patch is in a good enough state to allow a
realistic estimation of the overall work. Making global variables TLS is the
*easy* part. Redesigning postmaster, definining how to deal with extension
libraries, extension compatibility, developing tools to make developing a
threaded postgres feasible, dealing with freeing session lifetime memory
allocations that previously were freed via process exit, making the change
realistically reviewable, portability are all much harder.
Greetings,
Andres Freund
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Subject: Re: Let's make PostgreSQL multi-threaded
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