Postgresql15 crash with :FATAL: could not open shared memory segment "/PostgreSQL.0000000": No such file or directory

From: "Emile Amewoto (ZA)" <Emile(dot)Amewoto(at)absa(dot)africa>
To: "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Postgresql15 crash with :FATAL: could not open shared memory segment "/PostgreSQL.0000000": No such file or directory
Date: 2023-08-17 20:27:35
Message-ID: JN3P275MB230332409437F8A412BA938DF71AA@JN3P275MB2303.ZAFP275.PROD.OUTLOOK.COM
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Hi,
Can you please look into this:
Postgres version 15 randomly crash with the following error : FATAL: could not open shared memory segment "/PostgreSQL.2771626404": No such file or directory

After testing I found out that when shared memory is removed on:

1-PostgreSQL 12, 13,14: no impact, the server perform as normal.
2-PostgreSQL 15: postgresql server crash and no user is able to login to the DB. Any attempt to login you will get the above error.

Regards,
Emile

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