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Monday, June 01, 2009

XenDesktop Tuning Tips
By Pierre Marmignon @ 12:28 AM :: 7046 Views :: 4 Comments ::

Following the Article written by Paul Wilson on the Citrix Community Blog and my Article related to Terminal Server & XenApp Tuning I decided to also write this little article related to XenDesktop Tuning.

Many values were taken from XenApp Tuning because they can also be applied to Windows XP / Vista.

Do not hesitate to give us your comments for this Article to be updated with your experience and feedback.

Please note that these informations are provided "as is" and that using these tips is at your own risks.

Please also Note that all REG_DWORD values are provided in decimal format.

All Registry Hives are provided for x86 platforms. For x64 Platforms, do not forget to add "WoW6432Node" if hive is in HKLM\Software.

Operating System Tuning for XenDesktop

Registry Hive Value Type Data Purpose(s) Platform(s)
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\parameters DisableDHCPMediaSense REG_DWORD 1 Disables Windows AutoSense Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\parameters KeepAliveTime REG_DWORD 60000 Determines how often TCP sends keep-alive transmissions Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\parameters KeepAliveInterval REG_DWORD 100 Determines how often TCP repeats keep-alive transmissions when no response is received Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\parameters TcpMaxDataRetransmissions REG_DWORD 10 Determines how many times TCP retransmits an unacknowledged data segment on an existing connection Windows XP / Windows Vista
HKLM\SOFTWARE\microsoft\Windows NT\CurrentVersion\Winlogon WaitForNetwork REG_DWORD 1 Enables Netlogon to wait for the Network to be active Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug Debugger REG_SZ Nothing ("") Disables Dr Watson Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\wuauserv Start REG_DWORD 4 Disables Windows Update Service Windows XP / Windows Vista
HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects VisualFXSetting REG_DWORD 2 Sets Visual effects to "Optimize for Best Performances" Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\Print\Providers EventLog REG_DWORD 0 Disables Logging of Print Events W2K / Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\Spooler ErrorControl REG_DWORD 2 Disable Spooler errors from being displayed on the server console Windows XP / Windows Vista
HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System DontDisplayLastUserName REG_DWORD 1 Removes Display of Last Username Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon DeleteRoamingCache REG_DWORD 1 Deletes the Roaming Profiles cache after Logoff Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\Windows ErrorMode REG_DWORD 2 Disables Console error Messages Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application
MaxSize REG_DWORD 2097152 Sets Application Event's Log maximum size to 2048 Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application Retention REG_DWORD 0 Sets Circular Events logging Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Security MaxSize REG_DWORD   2097152 Sets Security Event's Log maximum size to 2048 Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Security Retention REG_DWORD 0 Sets Circular Events logging Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\EventLog\System MaxSize REG_DWORD   2097152 Sets System Event's Log maximum size to 2048 Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\EventLog\System Retention REG_DWORD 0 Sets Circular Events logging Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp fDisableCpm REG_DWORD 1 Disables Terminal Server Client Printers Mapping. This ensures that admin won't upload print drivers when connecting to any server for Administration purposes Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\CiSvc Start REG_DWORD 4 Disables the Indexing Service Windows XP
HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon BufferPolicyReads REG_DWORD 1 Optimizes GPO Execution when Opportunistic Locks are Disabled Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\FileSystem NtfsDisableLastAccessUpdate REG_DWORD 1 Sets NTFS not to update the last-access timestamp on each directory when it lists the directories on an NTFS volume Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\PriorityControl Win32PrioritySeparation REG_DWORD 38 Foreground application more reponsive than background Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management LargeSystemCache REG_DWORD 0 Provides a large virtual address space for the cache. Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management IoPageLockLimit REG_DWORD 65536 Specifies the maximum number of bytes that can be locked for I/O operations Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management DisablePagingExecutive REG_DWORD 1 Drivers and the kernel must remain in physical memory Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters MaxWorkItems REG_DWORD 512 Server Service Optimization Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters MaxMpxCt REG_DWORD 2048 Server Service Optimization Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters MaxFreeConnections REG_DWORD 100 Server Service Optimization Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters MinFreeConnections REG_DWORD 32 Server Service Optimization Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanWorkstation\Parameters MaxCmds REG_DWORD 2048 Increases Network capacity Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanWorkstation\Parameters UtilizeNTCaching REG_DWORD 0 Disable Caching Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\LanmanWorkstation\Parameters MaxThreads REG_DWORD 17 Maximum Concurrent Threads Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\MRXSmb\Parameters OplocksDisabled REG_DWORD 1 Disables Opportunistic Locking Windows XP / Windows Vista
HLM\SYSTEM\CurrentControlSet\Services\Lanmanworkstation\Parameters UseOpportunisticLocking REG_DWORD 0 Disables Opportunistic Locking Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\Lanmanserver\Parameters EnableOplocks REG_DWORD 0 Disables Opportunistic Locking   Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\Parameters Size REG_DWORD 3 Optimizes Network Performances for Applications (Along with LargeSystemCache) Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Control\Session Manager RegistryLazyFlushInterval REG_DWORD 30 Registry Flush Interval Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{44BBA840-CC51-11CF-AAFA-00AA00B6015C} StubPath REG_SZ "" Disable Outlook Express Icon Creation Windows XP
HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{7790769C-0471-11d2-AF11-00C04FA35D02} StubPath   REG_SZ "" Disable Windows Address Book Icon Creation Windows XP
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon DefaultDomainName REG_SZ YourDefaultDomain Sets Default Logon Domain Windows XP / Windows Vista
HKLM\SOFTWARE\Policies\Microsoft\Internet Explorer\Restrictions RestGoMenu REG_DWORD 1 Disable 'Mail and News' Menu from Internet Explorer Windows XP / Windows Vista
HKLM\Software\Microsoft\Windows\CurrentVersion\Applets\Tour RunCount REG_DWORD 0 Disable Windows XP Assistant Windows XP
HKLM\SYSTEM\CurrentControlSet\Services\wscsvc Start REG_DWORD 4 Disables security Center Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\BNNS\Parameters EnableOffload REG_DWORD 0 Recommend Performance Best Practice when Your XenApp Servers are Deployed via Provisioning Server Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Control ServicesPipeTimeout REG_DWORD 120000 Increases Services Timeout. recommended when using PVS. Windows XP / Windows Vista
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters DisableTaskOffload REG_DWORD 1 Turns off TCP checksum offloading on the network adapter. Recommended when using Provisioning Server Windows XP / Windows Vista

Along with these registry settings, do not forget to install UPHClean (Windows XP) to manage profiles at logoff and ensure no lock will remain leading to profiles corruption and long logoff times.

UPHClean is natively embedded into WindowsVista and later (User Profile Service).

Also with XenDesktop, it is recommended to Disable System Restore.

Additional Windows Explorer Tuning

The following Tuning Values are an extract from an Helge Klein blog post and were added on June, 1rst 2009 (Thanks to Laurent Falguiere for pointing these settings in his comment)

Registry Hive Value Type Data Purpose(s) Platform(s)
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer UseDesktopIniCache REG_DWORD 1 http://support.microsoft.com/kb/840309/EN-US Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer NoRemoteRecursiveEvents REG_DWORD 1 http://support.microsoft.com/?scid=kb%3Ben-us%3B330929&x=9&y=10 Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer NoRemoteChangeNotify REG_DWORD 1 http://support.microsoft.com/?scid=kb%3Ben-us%3B812669&x=14&y=12 Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer StartRunNoHOMEPATH REG_DWORD 1 http://support.microsoft.com/?scid=kb%3Ben-us%3B264061&x=18&y=9 Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer NoRecentDocsNetHood REG_DWORD 1 http://support.microsoft.com/?scid=kb%3Ben-us%3B264061&x=18&y=9 Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer NoDetailsThumbnailOnNetwork REG_DWORD 1 http://support.microsoft.com/?scid=kb%3Ben-us%3B830903&x=17&y=18 Windows XP / Windows Vista
HKLM\System\CurrentControlSet\Services\MRXSmb\Parameters InfoCacheLevel REG_DWORD 16 http://support.microsoft.com/kb/834350/EN-US Windows XP / Windows Vista
HKCR\*\shellex\PropertySheetHandlers\CryptoSignMenu SuppressionPolicy REG_DWORD 65536 http://support.microsoft.com/kb/829700/EN-US Windows XP / Windows Vista
HKCR\*\shellex\PropertySheetHandlers\{3EA48300-8CF6-101B-84FB-666CCB9BCD32} SuppressionPolicy REG_DWORD 65536 http://support.microsoft.com/kb/829700/EN-US Windows XP / Windows Vista
HKCR\*\shellex\PropertySheetHandlers\{883373C3-BF89-11D1-BE35-080036B11A03} SuppressionPolicy REG_DWORD 65536 http://support.microsoft.com/kb/829700/EN-US Windows XP / Windows Vista
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\SCAPI Flags REG_DWORD 1051650 http://support.microsoft.com/kb/829700/EN-US Windows XP / Windows Vista
HKLM\\SYSTEM\CurrentControlSet\Control\Session Manager SafeDllSearchMode REG_DWORD 1 http://support.microsoft.com/kb/306850/EN-US Windows 2000
HKLM\\SYSTEM\CurrentControlSet\Control\Session Manager SafeProcessSearchMode REG_DWORD 1 http://support.microsoft.com/?scid=kb%3Ben-us%3B905890&x=13&y=9 Windows XP / Windows Vista

XenDesktop Tuning

Registry Hive Value Type Data Purpose(s) Platform(s)
HKLM\Software\Citrix\Print DefaultPrnFlags REG_DWORD 134217728 Disables Logging of Print Events XenApp 4.X / 5.X

Note : These settings are only working with XenDesktop 3.0 and Later.

User Profile Tuning

The following settings are designed to tune the Default user profile. I'm mainly using them within Mandatory Profiles or Template Profile for Citrix Portable Profiles.

Registry Hive Value Type Data Purpose(s)
HKCU\Control Panel\Desktop AutoEndTasks REG_SZ 1 Determines whether user processes end automatically when the user either logs off.
HKCU\Control Panel\Desktop WaitToKillAppTimeout REG_SZ 20000 Determines how long the system waits for user processes to end after the user attempts to log off
HKCU\Control Panel\Desktop MenuShowDelay REG_SZ 10 Changes the Start menu display interval
HKCU\Control Panel\Desktop CursorBlinkRate REG_SZ -1 Specifies how much time elapses between each blink of the selection cursor
HKCU\Control Panel\Desktop DisableCursorBlink REG_DWORD 1 Enables / Disables Cursor Blink
HKCU\Control Panel\Desktop DragFullWindows REG_SZ 0 Specifies what appears on the screen while a user drags a window / Only the outline of the window moves
HKCU\Control Panel\Desktop SmoothScroll REG_DWORD 0 Scrolls using smooth scrolling
HKCU\Control Panel\Desktop Wallpaper REG_SZ (none) Sets Wallpaper to "None"
HKCU\Control Panel\Desktop\WindowsMetrics MinAnimate REG_SZ 0 Disabled. Window does not animate while being resized
HKCU\Control Panel\Desktop InteractiveDelay REG_DWORD 40 Optimizes Explorer and Start Menu responses Times
HKCU\\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects VisualFXSetting REG_DWORD 2 Sets Visual effects to "Optimize for Best Performances"
HKCU\Software\Microsoft\Internet Explorer\Main Force Offscreen Composition REG_DWORD 1 Force Internet Explore to use Offscreen Composition
HKCU\Software\Microsoft\CTF Disable Thread Input Manager REG_DWORD 1 Disables Language Bar 1/4
HKCU\Software\Microsoft\CTF\LangBar ExtraIconsOnMinimized REG_DWORD 0 Disables Language Bar 2/4
HKCU\Software\Microsoft\CTF\LangBar ShowStatus REG_DWORD 2 Disables Language Bar 3/4
HKCU\Software\Microsoft\CTF\MSUTB ShowDeskBand REG_DWORD 1 Disables Language Bar 4/4
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Desktop\CleanupWiz NoRun REG_DWORD 1 Disables Desktop Cleanup Wizard

XenDesktop Client Tuning

The following settings are designed to tune / debug the XenApp / XenDesktop ICA Client. These tips are extracted from an article originally published on Jim Moyle's Blog. I'd like to thank him for contacting me and asking me to add them to our existing tuning Article.

Description

Key

Value Name

Value

Automatically repair clipboard chain
CTX112434

HKEY_LOCAL_MACHINE\SOFTWARE \Citrix\ICA Client\Engine\Configuration\Advanced \Modules\WFClient

CbChainInterval

<value> 0-2000 valid

Prevent long logon script time breaking session sharing

CTX114379

HKEY_LOCAL_MACHINE\SOFTWARE \Citrix\ICA Client\Engine\Configuration\Advanced \Modules\WFClient\

ucConnTimeout

<string value> needs to be >20

Log the Launch.ica file to a Client Local File
CTX115304

HKEY_LOCAL_MACHINE\SOFTWARE \Citrix\ICA Client\Engine\Configuration\Advanced \Modules\Logging

LogFile=<path to file to log to that you want, use following format C:\ica\ica.log>

LogICAFile=true

Disable selected virtual channels from the client side
CTX116890

HKEY_LOCAL_MACHINE\SOFTWARE \Citrix\ICA Client\Engine\Configuration\Advanced \Modules\ICA 3.0

Remove relevant value

Revert to 9.x printing behaviour for a specific driver
CTX115553

HKEY_LOCAL_MACHINE\Software \Citrix\ICA Client

ReprocessEMFDriverList

<driver name>

Allow more than 20 client files open from a client mapped drive

CTX117315

HKEY_LOCAL_MACHINE\ SOFTWARE\Citrix\ICA Client\Engine\Configuration\Advanced \Modules\ClientDrive

MaxOpenContext

<value> eg 50

Prevent a seamless window from permanently hiding a minimized taskbar

CTX821811

HKEY_LOCAL_MACHINE\ SOFTWARE\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Seamless Windows

TWIShrinkWorkArea

Value: 5

Allow Custom Virtual Channels in ICA after upgrading from an earlier client

CTX113279

HKEY_LOCAL_MACHINE\ SOFTWARE\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Third Party\CustomVC

VirtualChannels

“”

How to use print screen in ICA sessions

CTX113344

HKEY_LOCAL_MACHINE\ SOFTWARE\Citrix\ICA Client\Engine\Configuration\Advanced \Modules\WFClient

ICAPrntScrnKey

<value> eg F12

Make a seamless window the focus as soon as it activates

CTX112499

HKEY_LOCAL_MACHINE\ Software\Citrix\ICA Client\Engine\Configuration\Advanced \Modules\WFClient

TWISeamlessFlag

Microsoft Office Tuning

The following settings are designed to tune Microsoft Office Applications for Terminal services / XenDesktop Use.

To use with your Office Version, Replace the #OfficeVersion# token with :

9.0 for Microsoft Office 2000
10.0 for Microsoft Office XP
11.0 for Microsoft Office 2003
12.0 for Microsoft Office 2007

When a token is not specified that's because the Tip do not apply to all versions

Registry Hive Value Type Data Purpose(s)
HKLM\Software\Microsoft\Office\11.0\Excel\Options AlwaysSaveToCurrentPath REG_DWORD 1 Always Save in Current Path(Even Remote Documents)
HKLM\Software\Policies\Microsoft\Office\#OfficeVersion#\Word\Options\vpref fSplBkg_99_1 REG_DWORD 0 Word : Disables Check Spelling as You Type
HKLM\Software\Policies\Microsoft\Office\#OfficeVersion#\Word\Options fGramBkg_535_1 REG_DWORD 0 Word : Disables Check Grammar as You Type
HKLM\Software\Policies\Microsoft\Office\#OfficeVersion#\Word\Options\Assist fCorrectTyping_16_1 REG_DWORD 0 Word : Disables Text Replacement As You Type
HKLM\Software\Policies\Microsoft\Office\#OfficeVersion#\Excel\Options fAnimationsOK_129_1 REG_DWORD 0 Excel : Disables Provide a Feedback With Animation
HKLM\SYSTEM\Software\Policies\Microsoft\Office\#OfficeVersion#\PowerPoint\Options Background spell checking REG_DWORD 0 Powerpoint : Disables Check Spelling as You Type
HKLM\Software\Microsoft\Office\11.0\Common\Open Find\Places\StandardPlaces\Desktop Show REG_DWORD 0 or 1 Manages the Display of the Desktop link Within Office Places Bar
HKLM\Software\Microsoft\Office\11.0\Common\Open Find\Places\StandardPlaces\MyComputer Show REG_DWORD 0 or 1 Manages the Display of the My Computer link Within Office Places Bar
HKLM\Software\Microsoft\Office\11.0\Common\Open Find\Places\StandardPlaces\MyDocuments Show REG_DWORD   0 or 1 Manages the Display of the My Documents link Within Office Places Bar
HKLM\Software\Microsoft\Office\11.0\Common\Open Find\Places\StandardPlaces\Publishing Show REG_DWORD   0 or 1 Manages the Display of the Network Locations link Within Office Places Bar
HKLM\Software\Microsoft\Office\11.0\Common\Open Find\Places\StandardPlaces\Recent Show REG_DWORD   0 or 1 Manages the Display of the Recent Documents link Within Office Places Bar

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Comments

# Laurent

Monday, June 01, 2009 5:35 PM

Hi Pierre

Thank you for this article!. I have some tuning tips to share... (I have not tested all of them)

Note that I use Nlite... It's not supported by Microsoft but you can create a very light XP (or vista) installation (by disabling all unneeded stuff)

First, this article is very useful (you did not mention it):
http://community.citrix.com/blogs/citrite/paulwi/2008/10/24/Windows+XP+Performance+Optimizations+for+XenDesktop+and+Provisioning+Server+vDisks

The following registry settings optimize network performances... Actually, some of these values are automatically set just by installing the XA plugin (TCPWindowsSize, TCPTimedWaitDelay)... Citrix recommands to disable TCP Offload (DisableTaskOffload) to avoid Freeze, locking or slow ICA performance with PVS...

; TCP Tuning
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"EnableTCPA"=dword:00000000
"EnableRSS"=dword:00000000
"EnableTCPChimney"=dword:00000000
"DisableTaskOffload"=dword:00000001
"TcpWindowSize"=dword:0000fc00
"TcpTimedWaitDelay"=dword:0000001e
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]
"DefaultSendWindow"=dword:0000fc00

Explorer tuning / reduce SMB traffic (from Helge Klein / Sepago)

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer]
“UseDesktopIniCache”=dword:00000001
“NoRemoteRecursiveEvents”=dword:00000001
“NoRemoteChangeNotify”=dword:00000001
“StartRunNoHOMEPATH”=dword:00000001
“NoRecentDocsNetHood”=dword:00000001
“NoDetailsThumbnailOnNetwork”=dword:00000001
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MRXSmb\Parameters]
“InfoCacheLevel”=dword:00000010
[HKEY_CLASSES_ROOT\*\shellex\PropertySheetHandlers\CryptoSignMenu]
“SuppressionPolicy”=dword:00100000
[HKEY_CLASSES_ROOT\*\shellex\PropertySheetHandlers\{3EA48300-8CF6-101B-84FB-666CCB9BCD32}]
“SuppressionPolicy”=dword:00100000
[HKEY_CLASSES_ROOT\*\shellex\PropertySheetHandlers\{883373C3-BF89-11D1-BE35-080036B11A03}]
“SuppressionPolicy”=dword:00100000
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\SCAPI]
“Flags”=dword:00100c02
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager]
“SafeDllSearchMode”=dword:00000001
“SafeProcessSearchMode”=dword:00000001

from
http://blogs.sepago.de/helge/2007/11/07/soup-up-your-terminal-server-optimizing-explorers-network-performance/

And Some tips I'have not tested:

;Uload Unused DLL

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer]
"AlwaysUnloadDll"=dword:00000001

;Disabling Prefetch
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters]
"EnablePrefetcher"=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dfrg\BootOptimizeFunction]
"Enable"="Y"

;NTFS performance

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem]

"NtfsDisable8dot3NameCreation"=dword:00000001
"NtfsDisableLastAccessUpdate"=dword:00000001
"Win95TruncatedExtensions"=dword:00000001
"Win31FileSystem"=dword:00000000

;DNS cache

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]

"CacheHashTableBucketSize"=dword:00000001
"CacheHashTableSize"=dword:00000180
"MaxCacheEntryTtlLimit"=dword:0000fa00
"MaxSOACacheEntryTtlLimit"=dword:0000012d

;bandWidth management
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Psched]
"NonBestEffortLimit"=dword:00000000

;Boot Optimization
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dfrg\BootOptimizeFunction]
"Enable"="N"

User Profile (Mandatory Profile in my case)... these settings can be also applied using standard Windows GPO but I figured out that it's better to apply it once and not to have to manage the GPO caching at every logon with a standard vdisk...

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
;Hide Drives ans restrict access
NoDrives =dword:
NoViewOnDrive = dword:
;Hide taskbar
NoSetTaskbar =dword:00000001
;Classic Start menu
NoSimpleStartMenu=dword:00000001
;Hide Display Control panel
NoDispSettingsPage=dword:00000001
;Hide Run from Start Menu
NoRun=dword:00000001

;Disable Desktop Cleanup Wizard
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Desktop\CleanupWiz]
"NoRun"=dword:00000001

;Disable Balloon tips
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"EnableBalloonTips"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"FolderContentsInfoTip"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\tips]
"Show"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"StartButtonBalloonTip"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"ShowInfoTip"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoSMBalloonTip"=dword:00000000

;Désactive l'affichage des catégories du panneau de configuration
[HKEY_USERS\S-1-5-21-1177238915-884357618-725345543-500\Software\Microsoft\Windows\CurrentVersion\Explorer\WebView\BarricadedFolders]
"shell:ControlPanelFolder"=dword:00000000

;Delete Recent Docs list from Start menu
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoRecentDocsMenu"=dword:00000001

;Disable low disk space Warning
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoLowDiskSpaceChecks"=dword:00000001

;Hide Help from start menu

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoSMHelp"=dword:000000

;Disable media player Codec upgrade
[HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences]
"UpgradeCodecPrompt"=dword:00000000

;Disable description
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion]
"ShowInfoTips" =dword:00000001

;Classic Search
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\CabinetState]

"FullPath"=dword:00000001
"FullPathAddress"=dword:00000001
"Use Search Asst"="no"
"Settings"=hex:0c,00,02,00,1b,01,e7,77,60,00,00,00

# Pierre Marmignon

Monday, June 01, 2009 5:53 PM

Dear Laurent,

First thanks for sharing with us !

Actually Paul's Article is linked at the beginning of this document ;)

I've updated the Tuning Tips and added the DisableTaskOffload Value as I forgot to add it :)

Best Regards and Thanks again Laurent !

# Laurent

Monday, June 01, 2009 6:34 PM

lol.. I guess it's time for me to get some rest!!! (feria of Nimes is over)....

# Puderzo

Wednesday, August 12, 2009 3:11 PM

Nice article Pierre!

Would it be too much to ask to get these tuning tips in a copy-paste ready format for input into a .reg file? (Or is there one available somewhere already?) It's taking me ages to go through every one in regedit and editing manually.

I know this creates the additional risk that someone will just import the whole bunch without knowing what they do, but then again, that risk is already there.

- Puderzo

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