Re: Shared Memory: How to use SYSV rather than MMAP ?

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: tony(dot)reix(at)atos(dot)net
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, sylvie(dot)empereur-mot(at)atos(dot)net
Subject: Re: Shared Memory: How to use SYSV rather than MMAP ?
Date: 2018-11-20 12:53:53
Message-ID: CA+TgmobOSSB8NQB6kBp+HuH8hBBBXxOAdT7TOxvQ7g6x-5oXpg@mail.gmail.com
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On Tue, Nov 20, 2018 at 5:11 AM REIX, Tony <tony(dot)reix(at)atos(dot)net> wrote:
> On AIX, since with MMAP we have only 4K pages though we can have 64K pages with SYSV, we'd like to experiment with SYSV rather than MMAP and measure the impact to the performance.

Are you trying to move the main shared memory segment or the dynamic
shared memory segments?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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