Copying a File to Client Drive is Slow on Citrix VDI

Copying a File to Client Drive is Slow on Citrix VDI

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Article ID: CTX208936

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Updated On:

Description

Saving a file or copying a file to local client drive is very slow on Citrix VDI.

Environment

Caution! Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.

Resolution

Caution! Refer to the Disclaimer at the end of this article before using Registry Editor.
  1. On the VDA Set the value for the following two keys in the registry to 1
    • Path: HKLM\SYSTEM\CurrentControlSet\services\picadm\Parameters
    • DWord: EnableCcReadCache and EnableCcWriteCache
  2. Disable flow control on VDA:
    • Path: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\SpeedScreen
    • Name: SkipFlowControl
    • Type: REG_DWORD
    • Data: 1 (disable flow control);
  3. On the VDA, increase Cache Timeout Key:
    • Path: HKLM\System\CurrentControlSet\Services\picadm\Parameters
    • Name: CacheTimeout
    • Type: DWORD
    • Value: 500
  4. On the VDA, make the following changes:
    • Path: HKLM\System\CurrentControlSet\Services\picadm\Parameters
    • Name: SetMaxIOSize
    • Type: DWORD
    • Value: 1
  5. On the client device
    • HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\ICA Client\Engine\Configuration\Advanced\Modules\ClientDrive\HighThroughputWindowSize or
    • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\ICAClient\Engine\Configuration\Advanced\Modules\ClientDrive\HighThroughputWindowSize(REG_SZ) to 65535 or less 
  6. On the Client set HKLM\Software\wow6432node\citrix\ICA Client\Engine\Configuration\Advanced\Modules\TCP/IP\OutBufCountClient2=195
  7. On the Client HKLM\Software\wow6432node\citrix\ICA Client\Engine\Configuration\Advanced\Modules\TCP/IP\OutBufCountHost2= 195

Issue/Introduction

Saving a file or copying a file to local client drive is very slow on Citrix VDI.
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