[THIN] Re: Memory usage setting
- From: "Rick Mack" <ulrich.mack@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Fri, 25 Jan 2008 08:13:37 +1000
Hi Chad,
Changing the processor scheduling option modifies a value under
HKLM\System\CurrentControlSet\Control\PriorityControl,
Win32PrioritySeparation which consists of 6 bits, AABBCC:
AA
01 longer timeslice interval
10 shorter intervals
BB
01 timeslice can have variable length
10 timeslice has fixed length
CC
00 foreground/background processes have same priority
01 foreground process gets 2 x boost compared to background process
10 foreground process gets 3 x boost compared to background process
When you use the GUI to set the performance options, only 2 values are
possible:
Background Services: value is 24, binary is 011000
longer timeslice interval, timeslice fixed length, no
boost
Programs: value is 38, binary is 100110
shorter intervals, variable timeslice length, 3 x boost
Neither of the settings is in fact optimal, although the "programs" option
is the better of the 2. Shorter timeslices are mandatory for TS, variable
timeslice length is probably better fixed and if we're talking PS 4+
Enterprise or Platinum the 3x application priority boost for the default
"programs" value makes the CPU share management somewhat less effective.
This will probably generate some discussion but I think the optimum value is
101000 binary or 40 decimal. That gives us small, fixed length timeslices
and we let CPU management be done by the Citrix or third party tools.
If you've got to choose between the default settings, the "programs"
settings is probably better than "background services" purely from the
aspect of shorter timeslices.
For those of you that use GPs for everything, the following custom policy
template piecse may help:
POLICY "Processor Scheduling"
KEYNAME "System\CurrentControlSet\Control\PriorityControl"
PART "Optimize performance for:" DROPDOWNLIST REQUIRED NOSORT
VALUENAME "Win32PrioritySeparation"
ITEMLIST
NAME "Background Services" VALUE NUMERIC 24
NAME "Applications" VALUE NUMERIC 38
NAME "TS Optimized" VALUE NUMERIC 40 DEFAULT
END ITEMLIST
END PART
END POLICY ; Processor scheduling
regards,
Rick
--
Ulrich Mack
www.commander.com
On Jan 25, 2008 3:18 AM, Chad Schneider (IT) <Chad.M.Schneider@xxxxxxxxxxxxx>
wrote:
> What is the recommended setting for memory useage on a Windows 2003 TS
> server with Citrix PS 4.0 on it? By default it is set to "Adjust for best
> performance of: System Cache. Should it be changed to Programs?
>
> I know it is recommended to change the Processor scheduling to BackGround
> Services from Programs.
>
> Thanks!
>
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