From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dor Laor Subject: Re: How much physical memory can be used to run domains in a KVM machine? Date: Fri, 17 Jul 2009 10:17:18 +0300 Message-ID: <4A60257E.3060908@redhat.com> References: <8b8dd4340907162250j55b6d93l4a20dc6f42c6e3a2@mail.gmail.com> Reply-To: dlaor@redhat.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Zhang Qian Return-path: Received: from mx2.redhat.com ([66.187.237.31]:38988 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934136AbZGQHQx (ORCPT ); Fri, 17 Jul 2009 03:16:53 -0400 In-Reply-To: <8b8dd4340907162250j55b6d93l4a20dc6f42c6e3a2@mail.gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: On 07/17/2009 08:50 AM, Zhang Qian wrote: > Hi, > > I have a KVM box which has 4GB physical memory totally, I'd like to > know how much I can use to run my domains, and how much will be > reserved by hypervisor(KVM) itself? > Thanks! > KVM and the Linux host use relatively low amount of memory. Unlike other hypervisors you know, kvm does not reserve memory and also is able to swap the guest memory, so you can even use more than 4G for your guest. (Just note swapping will be slow) > > Regards, > Qian > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html