Date: Sun, 16 Mar 2003 16:00:08 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: andykinney@advantagecom.net Cc: Julian Elischer <julian@elischer.org>, freebsd-hackers@freebsd.org Subject: Re: increasing KVA_PAGES and broken pthreads Message-ID: <3E751008.818915CA@mindspring.com> References: <3E71FB25.27881.363E6F4@localhost> <3E7209EE.8610.39DAB11@localhost>
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Andrew Kinney wrote: > Really? I was under the impression that FreeBSD was capable of > addressing 8TB of RAM if the hardware supports it. Don't > remember which FreeBSD list archive I read that in, but it's not a > topic that seems to come up often since most hardware is limited > to 4GB of address space. I've got access to hardware that can > address 32GB of RAM. Not sure of the exact details of how it > works (multiple external memory managers?), but it's a quad Xeon > board by SuperMicro. No, it can not access 32G of RAM. It can access a 4G window on 32G of RAM. > If it's a question of "is there any application that can ever use that > much RAM", we're certainly testing the limits here. :-) We're not > swapping at all with 4GB, but on several occasions we've gotten > close or swapped a few hundred KB. Our two little 2GHz CPUs > are humming right along, but most of the time they're better than > 60% idle. I imagine that if we pushed the CPUs a bit harder or got > hit with a big traffic spike, we'd probably start swapping and want to > start thinking about a system that can handle more RAM. Suggest you examine: <http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1124056+0+archive/2003/freebsd-current/20030316.freebsd-current>; Specifically, search for "Jake Burkholder". Likely, when this is committed, it will be treated as "a different architecture" (IMO), rather than "Patches to i386". See the recent PC98 "It's ISA!"/"It's not!"/"Is too!"/"Is not!"/... discussion for details as to why. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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