Re: 64 Bit Linux shows 4GB... was Using all of 4GB RAM...

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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
[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [Fedora Magazine]     [Fedora News]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Maintainers]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Legacy]     [Fedora Desktop]     [Fedora Fonts]     [ATA RAID]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [SSH]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Centos]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Tux]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Asterisk PBX]     [Fedora Sparc]     [Fedora Universal Network Connector]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux