Date: Fri, 3 May 2002 07:16:33 -0700 (PDT) From: Patrick Thomas <root@utility.clubscholarship.com> To: Alfred Perlstein <bright@mu.org> Cc: <freebsd-hackers@freebsd.org> Subject: Re: RFC on my SHM tunings for multiple jailed postgres... Message-ID: <20020503071536.G86733-100000@utility.clubscholarship.com> In-Reply-To: <20020503082731.GI36741@elvis.mu.org>
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So kern.ipc.shm_use_phys=1 will give me more flexibility, but will slow down performance (vs. using kernel memory) ? thanks, PT On Fri, 3 May 2002, Alfred Perlstein wrote: > * Patrick Thomas <root@utility.clubscholarship.com> [020503 00:38] wrote: > > > > I have a large server that will be running ~24 jails, 8 of which will be > > running their own postgres server. > > You should be aware of the kern.ipc.shm_use_phys sysctl, you might > want to try flipping it on if you encounter problems as it will > greatly reduce the amount of kernel memory required to track > shared memory segments at the expense of making them non-pageable. > > -- > -Alfred Perlstein [alfred@freebsd.org] > 'Instead of asking why a piece of software is using "1970s technology," > start asking why software is ignoring 30 years of accumulated wisdom.' > Tax deductible donations for FreeBSD: http://www.freebsdfoundation.org/ > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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