[[!meta copyright="Copyright © 2007, 2008 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU_Free_Documentation_License|/fdl]]."]]"""]] [[!meta title="512 MiB RAM Limit"]] GNU Mach does not cope well with lots of memory. Newer versions of the Debian `gnumach` package will limit themselves to around 1 GiB of memory. If you have an older version, or still experience problems with `vmstat` (see above) reported much less memory than you have, the best is to limit the memory it can see via GRUB's `upppermem` feature. Add `uppermem 786432` to GRUB's Hurd entry in `menu.lst`.