On Wed, 2008-10-01 at 13:56 -0400, Linuxguy123 wrote: > Dennis Gilmore suggested that I boot a 64 bit Live CD to see what it > said about memory usage. So I did: > > [fedora@localhost ~]$ free -m > total used free shared buffers > cached > Mem: 3969 1286 2682 0 143 > 827 > -/+ buffers/cache: 315 3654 > Swap: 1992 0 1992 > > Here is what it looks like under my 32 bit installation: > > $ free -m > total used free shared buffers > cached > Mem: 3034 978 2055 0 33 > 619 > -/+ buffers/cache: 326 2708 > Swap: 1992 0 1992 > > I appear to gain 935MB of RAM running the 64 bit version. This is in > spite of the spec sheet on my laptop saying: > > "Memory 4096 MB Memory Max Up to 4GB DDR2 (Up to 1 GB may not be > available due to 32-bit operating system resource requirements)" > > This message probably means to say that the memory is available above > the 4GB address limit of 32 bit programs and that 32 bit applications > can't access it. But its there for 64bit applications to use because it > probably gets remapped above the 4GB boundary and 64 bit applications > can address it there. > > The only difference between the two tests is that with the 32bit > installation I am running 2 1680x1050 monitors side by side, whereas > with the 64 bit test both monitors were running but they were displaying > the same thing. I don't think this makes a difference in the amount of > memory available because I ran it earlier in the week without the 2nd > monitor and it still showed it was only using 3GB. > > It looks like the 64bit version of Linux makes use of all the available > RAM, whereas the 32bit version only uses the first 3GB. > > So... what is the easiest way to convert my 32 bit installation to 64 > bits ? Please don't tell me to reinstall because I just did that > earlier this week to go from F9 back to F8. ---- sorry - reinstall is your only option Craig -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
