Date: Mon, 20 Apr 1998 00:30:56 -0700 From: David Greenman <dg@root.com> To: Andrzej Bialecki <abial@nask.pl> Cc: Raul Zighelboim <rzig@verio.net>, "'David E. Cross'" <dec@phoenix.its.rpi.edu>, "'hackers@freebsd.org'" <hackers@FreeBSD.ORG> Subject: Re: 1 Gbyte of ram Message-ID: <199804200730.AAA12800@implode.root.com> In-Reply-To: Your message of "Mon, 20 Apr 1998 08:22:42 %2B0200." <Pine.NEB.3.95.980420081644.224B-100000@korin.warman.org.pl>
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>> A patch is usually only required if you need to support a large number of >> TCP connections (and thus needs lots of mbuf clusters/kernel VM). FreeBSD >> 2.2.6, -stable, and -current should otherwise work out of the box with 1GB >> of RAM. > >And what with the "kmem_map too small" type errors? (I'm not getting them, >I'm just curious, because I remember this was an issue in 2.2.2 days...). That is cause by the kernel malloc area being too small. The parameter that controls that is VM_KMEM_SIZE; the default is 32MB, and on wcarchive this is set to 96MB - but that may only be possible if the entire kernel virtual address space is increased (which is what the "patch" does that you're talking about). All of these values need to be carefully tuned as a function of the type of load they will be expected to handle. Someone needs to write a book on how to tune everything properly... >BTW. I don't quite understand what's the problem with bounce buffers - can >they be made to work out-of-the-box with large RAMs or can't they??? As it >is now (and has been for some time), the boot.flp dies on machines with >= >512MB RAM, and IMHO this shouldn't happen... Well, that's interesting since I installed 2.2.6 on a machine with 512MB RAM myself a couple of weeks ago and I'm pretty sure that this was also tested by Jordan prior to the release. Are your sure it doesn't install for you with 512MB of RAM? -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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