[BlueOnyx:03966] Re: Memory Limit

[Gerald Waugh]

On Thu, 2010-03-11 at 12:37 -0500, Gerald Waugh wrote:
> On Thu, 2010-03-11 at 13:12 -0500, Darrell D. Mobley wrote:
> > > -----Original Message-----
> > > From: blueonyx-bounces at blueonyx.it [mailto:blueonyx-bounces at blueonyx.it]
> > > On Behalf Of Stephanie Sullivan
> > > Sent: Thursday, March 11, 2010 12:16 PM
> > > To: 'BlueOnyx General Mailing List'
> > > Subject: [BlueOnyx:03955] Re: Memory Limit
> > > 
> > > Be aware that .ELsmp kernels are PAE kernels too. If you are running a
> > > multi-core (I think) if you install a PAE kernel it will only use one
> > > core.
> > > I'd suggest that using an smp kernel if you are not sure. The additional
> > > overhead on a single core system is minimal.
> > 
> > Stephanie, could we discuss this a little more?  I have an HP DL380 G3,
> > which is dual 2.8Ghz Xeon processors.  I have been running the PAE kernels,
> > thinking that was required to access my 6GB of RAM.  Are you saying that I
> > might be wise to try an SMP kernel to get better performance?
> 
> Not sure about Zeon
> My server dual core processor
> Intel(R) Core(TM)2 Duo CPU     E6750  @ 2.66GHz
> uname -a 
> 2.6.18-164.11.1.el5 #1 SMP
> /boot/config-2.6.18-164.11.1.el5
> CONFIG_HIGHMEM4G=y
> 
> So kernel is configured for more than 4GB RAM
> I only have 4GB.
Sorry to beat the dead horse but got interested.

looks like the smp kernels are pae.
  cat /proc/cpuinfo | grep pae
flags           : fpu vme de pse tsc msr !!pae!! mce cx8 apic mtrr pge
mca  cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
constant_tsc pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm

Gerald