Is there a recommended minimum size for dom0''s memory footprint? I recall reading that the hypervisor requires 40 MB for itself. And yes, I realize that you can dynamically resize dom0 using the "xm mem-max" and "xm mem-set" commands. I''m looking for a best practice out there for sizing dom0 RAM that should be followed. Any ideas? Jeff ----------------------------------------- "This email (including any attachments) is confidential. If you are not the intended recipient you must not copy, use, disclose, distribute or rely on the information contained in it. If you have received this email in error, please notify the sender immediately by reply email and delete the email from your system. Confidentiality and legal privilege attached to this communication are not waived or lost by reason of mistaken delivery to you. Lend Lease does not guarantee that this email or the attachment(s) are unaffected by computer virus, corruption or other defects. Lend Lease may monitor incoming and outgoing emails for compliance with its Email Policy. Please note that our servers may not be located in your country." _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Sat, 2005-12-17 at 10:09 -0500, Costa, Jeff wrote:> Is there a recommended minimum size for dom0''s memory footprint? I > recall reading that the hypervisor requires 40 MB for itself. And yes, > I realize that you can dynamically resize dom0 using the "xm mem-max" > and "xm mem-set" commands. > > I''m looking for a best practice out there for sizing dom0 RAM that > should be followed. Any ideas?<snip> I thought I recalled the documentation saying somewhere that the minimum should be 128 MB but I am by no means expert nor have I done any testing to find the lower limit - John -- John A. Sullivan III Open Source Development Corporation +1 207-985-7880 jsullivan@opensourcedevel.com If you would like to participate in the development of an open source enterprise class network security management system, please visit http://iscs.sourceforge.net _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > I''m looking for a best practice out there for sizing dom0 RAM that > > should be followed. Any ideas? > <snip> > I thought I recalled the documentation saying somewhere that the > minimum should be 128 MB but I am by no means expert nor have I done > any testing to find the lower limit - JohnThat''s up to your tests and requirements. We have several 64 MB (no swap) dom0 with more than 150 processes in each. That works well as long as you don''t need to run more memory consuming tasks and you optimize your server to just launch absolutely required daemons at startup (we boot at just less than 25/30 processes, including kernel ones). Really, it depends on what will be launched inside it. Some distros won''t let you boot with such a small amount also. They install too many daemons by default. Lastly, Xen 3 let you define the minimal amount of memory to keep for dom0 in xend''s config file. You don''t need to specify "dom0_mem" at boot time, xen will balloon memory out of dom0 as required. Regards, -- Sylvain COUTANT ADVISEO http://www.adviseo.fr/ http://www.open-sp.fr/ _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users