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Re: [Xen-users] 32bit vs 64bit memory usage question
| To: | xen-users@xxxxxxxxxxxxxxxxxxx |
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| Subject: | Re: [Xen-users] 32bit vs 64bit memory usage question |
| From: | Tom Miller <madprogextrodinr@xxxxxxxxx> |
| Date: | Mon, 05 Feb 2007 10:00:35 -0500 |
| Delivery-date: | Mon, 05 Feb 2007 07:00:31 -0800 |
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Jamie Burns wrote: Hello,I recently installed a minimal 32bit version of Debian Etch, and then also installed Xen from Debian's package repository.When Xen booted up, memory usage was just below 40MB (typical for such a debian install).Then I decided to do the exact same install, but using the 64bit version of Debian Etch and Xen.This time when Xen booted up, memory usage was just over 90MB - at least double that of the 32bit version.Can anybody explain this to me? Why 64bit XEN would use double the memory?If I try 32bit vs 64bit debian without using XEN, then memory use about 30MB with each - no doubling.Jamie Burns. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users 64 bit pointers and 64 bit memory address slots are twice as big as corresponding 32 bit ones. So unless you have 4 GB of memory or more, using 64bit software is actually slower for the system, not faster. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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