Horton

Re: introduce dynamic shared memory registry

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Andrei Lepikhov <a.lepikhov@postgrespro.ru>
Cc: pgsql-hackers@postgresql.org
Date: 2023-12-19T16:01:17Z
Lists: pgsql-hackers 
On Mon, Dec 18, 2023 at 03:32:08PM +0700, Andrei Lepikhov wrote:
> 3. The dsm_registry_init_or_attach routine allocates a DSM segment. Why not
> create dsa_area for a requestor and return it?

My assumption is that most modules just need a fixed-size segment, and if
they really needed a DSA segment, the handle, tranche ID, etc. could just
be stored in the DSM segment.  Maybe that assumption is wrong, though...

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com

Commits

  1. Fix possible NULL pointer dereference in GetNamedDSMSegment().

  2. Teach autoprewarm to use the dynamic shared memory registry.

  3. Introduce the dynamic shared memory registry.

  4. doc: Reorganize section for shared memory and LWLocks.