Re: FreeBSD 7 needing to allocate lots of shared memory

From: Christiaan Willemsen <cwillemsen(at)technocon(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Bill Moran <wmoran(at)collaborativefusion(dot)com>, Isak Hansen <isak(dot)hansen(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: FreeBSD 7 needing to allocate lots of shared memory
Date: 2008-11-18 16:29:25
Message-ID: 4922ED65.8070401@technocon.com
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Hi Tom,

Tom Lane wrote:
> I'm wondering about the shmall setting myself. The Postgres docs
> suggest that FreeBSD measures shmall in pages. If so, the above
> setting is far too large and is perhaps resulting in an internal
> overflow in the kernel.
>
Hmm, might be.. I can try lowering the value, but if this is the problem
what is max?
> (For that matter, are you certain that shmmax can be set beyond
> 2G either? It might only be int inside the kernel.)
>
I'm not at all a freeBSD expert... We just happen to use this because
anything else just won't work with our disk controller (don't ask).

Kind regards,

Christiaan Willemsen

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