Re: Running docker in postgres, SHM size of the docker container in postgres 16 - Mailing list pgsql-general

From Thomas Munro
Subject Re: Running docker in postgres, SHM size of the docker container in postgres 16
Date
Msg-id CA+hUKGKKUoS4PDjjP_j6tHRS7jPm=Pu+4Ai56ZT+UWoT2FRcoQ@mail.gmail.com
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In response to Running docker in postgres, SHM size of the docker container in postgres 16  (Koen De Groote <kdg.dev@gmail.com>)
Responses Re: Running docker in postgres, SHM size of the docker container in postgres 16
List pgsql-general
On Wed, Nov 20, 2024 at 11:22 AM Koen De Groote <kdg.dev@gmail.com> wrote:
> Why would that be? It's the exact same data. The install is about 50GB in size. Is there something wrong with
postgres16, or did some settings significantly change, that I need to know about? I went over all the changelogs,
nothingstood out as relevant to this, but that might be a lack of experience on my end. 

Parallel vacuum arrived in PostgreSQL 13, and that uses "dynamic
shared memory" to share state between workers, and assuming
dynamic_shared_memory_type=posix, that means shm_open(), which opens
files under /dev/shm on Linux.



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