[THIN] Re: /3GB or /PAE

Hi Evan,

Dell hasn't been shipping the EM64T chips in Australia yet (at least
not systems received by my customers in the last 3-4 weeks). So I can
guess where they're dumping their older components :-(

Microsoft are claiming up to 50% better scalability running terminal
services on 64 bit x64 compared to the same hardware running X86. The
unofficial word from some Citrix engineers was at least 20-30% better
scalabitly on x86 running the x64 compatibile PS4 technical preview.
And remember this is running 32-bit applications.

Printer drivers are one issue. If a printer isn't supported by the
native Microsoft x64 drivers, then you may have a problem. HP have
64-bit drivers for a lot of their printers and Thinprint and the PS4
upd (III) would get around this issue for non-64-bit compatible
printers. Seagull Scientific have a pretty complete range of 64-bit
barcode/label printer drivers so it's not a huge problem.

Any application that uses 32 bit drivers probably wouldn't work (don't
know too many of these) and of course 16-bit apps are a no go
(finally! ;-))

regards,

Rick

-- 
Ulrich Mack
Volante Systems


On 7/30/05, Evan Mann <emann@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Dell has been putting EM64T chips in servers for a while now.  All
> 1850's and 2850's have them, which my 3 Citrix boxes are.  Anyone have
> any info on how much performance gain one would expect moving to 64bit
> compatible version on the same hardware?
> 
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
> Behalf Of Rick Mack
> Sent: Saturday, July 30, 2005 12:13 AM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: /3GB or /PAE
> 
> 
> Hi,
> 
> More than a performance hit. The /3GB switch reduces the paged pool size
> quite significantly. This doesn't matter on a SQL or Exchange server
> where you're not running too many processes, but on a terminal server
> you'll be playing with fire.
> 
> As adam wrote, the /PAE does have a siginificant performance hit,
> particularly if your system does signficant paging.
> 
> The 64-bit compatible version of Presentation Server will be out in 1-2
> months, or if you want to have a play the Technical Release is available
> for download right now.
> 
> If you've got new systems (just about anyone but Dell) then it's highly
> likely that the Intel Xeon will be an EM64T chip which is 64-bit
> capable.
> 
> Then your only memory problem will be how much can you cram into the
> box?
> 
> regards,
> 
> Rick
> 
> --
> Ulrich Mack
> Volante Systems
> 
> 
> On 7/30/05, Evan Mann <emann@xxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> >
> > On a Citrix App server running PS4 on 2003 SP1, with 4 gigs of
> > physical RAM, should the /3GB and/or the /PAE switch be used in the
> > boot.ini ?
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