Re: Pre-allocation of shared memory ...

From: Lamar Owen <lamar(dot)owen(at)wgcr(dot)org>
To: "Nigel J(dot) Andrews" <nandrews(at)investsystems(dot)co(dot)uk>
Cc: Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Pre-allocation of shared memory ...
Date: 2003-06-14 15:52:34
Message-ID: 200306141152.34936.lamar.owen@wgcr.org
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On Friday 13 June 2003 15:29, Lamar Owen wrote:
> It is or was a Linux kernel problem. The 2.2 kernel required double swap
> space, even though it wasn't well documented. Early 2.4 kernels also
> required double swap space, and it was better documented. Current Red Hat
> 2.4 kernels, I'm not sure which VM system is in use. The old VM certainly
> DID require double physical memory swap space.

After consulting with some kernel gurus, you can upgrade to a straight Alan
Cox (-ac) kernel and turn off overcommits to cause it to fail the allocation
instead of blowing processes out at random when the overcommit bites.
--
Lamar Owen
WGCR Internet Radio
1 Peter 4:11

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