PAE or 64bit?

Kris Kennaway kris at
Wed Aug 20 22:42:11 UTC 2008

B. Cook wrote:
> hey all,
> Looking for opinions..
> We are going to be getting a server for drupal, running lighttpd and 
> php, as well as exim and SA with clamav, courier or dovecot, mysql 51.. 
> etc.
> Right now this setup does about 200G per month (we have two boxes) and 
> were looking at getting one box to do it all (business department 
> reasons) and assuming it would be doing double the work.. we would be 
> looking at a single box running 600GB max per month in traffic (about 
> 2Mb/sec)..
> We would be (hopefully) be going with sas drives instead of the sata we 
> have atm.  Not trying to make this a debate about hardware but..
> The question of at least 4G of ram came up.. and we starting debating 
> about PAE or just going with x64..
> we would not be using zfs, we would be running RELENG_7_0.
> again, looking for opinions on PAE vs x64 for this type of setup.

PAE would only be of potential benefit if you know you are running a 
workload that will benefit from running in 32-bit mode instead of 64. 
In your situation that is almost certainly not the case, so just go with 


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