[nycbug-talk] Memory sizing

Isaac Levy ike at lesmuug.org
Sat Apr 22 11:44:13 EDT 2006

Hi Francisco,

First question: what OS do you plan to run?  The key term here is  
'PAE', for i386 systems, "The Physical Address Extension (PAE)  
capability of the Intel® Pentium Pro and later CPUs allows memory  
configurations of up to 64 gigabytes" (FreeBSD handbook).

***(Note- Upcoming meeting has Mickey speaking about PAE on OpenBSD)***

On Apr 21, 2006, at 11:47 PM, Francisco Reyes wrote:

> Soon to buy a couple of new server and wondering if we should get  
> 4GB or
> 8GB. My first stop is trying to better understand memory utilization.

 From my experience with PAE on FreeBSD, it's currently an additional  
kernel compile, like SMP,

Section 8.4.1

It's not rocket science, and *seems* to be stable, but the machine  
I've used it on is NOT a heavy-lifter- (it simply runs Samba with  
TONS of files).

Noteworthy- one process can only use up to 4GB of physical memory  
here.  I'm not sure if this is a limitation of the processor, or the  
FreeBSD implementation.

> Any suggested links?
> I have several machines simmilar machines to the functionality of  
> one of the
> new servers (mail machine), the second new server will be a PostgreSQL
> database.. to host millions of records with about 250GB worth of data.

For FreeBSD, the handbook link above helps.  For Other BSD os's, I  
hope others post urls... I'm curious too...


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