[CentOS] CENTOS 5.5 X86 continue get "out of memory" error?????

Thu Nov 25 00:39:05 UTC 2010
Robert Heller <heller at deepsoft.com>

At Thu, 25 Nov 2010 08:23:10 +0800 (CST) CentOS mailing list <centos at centos.org> wrote:

> 
> Thnak you for answer.
> 
> We can NOT use X86_64 due to application NOT support 64 bits.

You can run 32-bit applications with a 64-bit kernel.  CentOS / RHEL
installs the 32-bit shared libraries along with the 64-bit libraries.

You can also install xen (or kvm) and run 32-bit slave (virtual)
processes, with reasonable amounts of memory.


> 
> If I take some RAM out of server (for example take out 32 GB RAM and left 32 GB RAM on server), will problem fix?
> 
> Thanks.
> 
> --- 10/11/24 (三)，John R Pierce <pierce at hogranch.com> 寫道：
> 
> > 寄件者: John R Pierce <pierce at hogranch.com>
> > 主旨: Re: [CentOS] CENTOS 5.5 X86 continue get "out of memory" error?????
> > 收件者: "CentOS mailing list" <centos at centos.org>
> > 副本: "mcclnx mcc" <mcclnx at yahoo.com.tw>
> > 日期: 2010年11月24日,三,下午7:13
> > On 11/24/10 3:59 PM, mcclnx mcc
> > wrote:
> > > we just installed CENTOS 5.5 X86 (32 bits) on DELL
> > server.  After installed we also apply lated O.S.
> > patches.
> > >
> > > This server have 64 GB RAM and run
> > "2.6.18-194.26.1.el5PAE #1 SMP ".  when I doing "cp",
> > "mv". "ftp", ....  it continue "kill" my process and
> > pop up "out of memory" on /var/log/messages:
> > >
> > > ...
> > >
> > > any one know why?
> > >
> > > Is CENTOS X86 5..5 really NOT stable version?
> > 
> > no, using 32 bit PAE with 64GB of memory means your page
> > tables are 
> > using ALL of the available 1GB kernel address space
> > available.
> > the 32 bit kernel chokes itself under these extreme
> > conditions.   this 
> > is an architectural feature of the Intel x86, the
> > "solution" is 64 bit 
> > mode where the page tables and kernel and a user process
> > don't all have 
> > to fit into 4GB of address space.
> > 
> > 
> > 
> > 
> 
> 
>       
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>                                                                                           

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Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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