CPU consumed by a session on VDA mismatches associated session or published apps importance level

CPU consumed by a session on VDA mismatches associated session or published apps importance level

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Article ID: CTX127135

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Updated On:

Description

The CPU resource consumed by a session on a XenApp Server does not match the associated session and/or published application importance levels.

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

Complete the following steps to disable DFSS using the dedicated DFSS registry key rather than using the Turn off Fair Share CPU Scheduling Group Policy setting:

Caution! Refer to the Disclaimer at the end of this article before using Registry Editor.

  1. Under the Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections Group Policy node, set Turn off Fair Share CPU Scheduling to Not configured.

  2. Run regedit.exe.

  3. Locate the following registry key and set the EnableCpuQuota REG_DWORD value to 0 (zero):
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Quota System.

  4. Reboot the server.

Problem Cause

Session and Published Application Importance levels are enforced when the XenApp CPU Management Server Level has been set to Preferential Load Balancing and Microsoft Fair Share CPU Scheduling (DFSS) has been disabled.

Although there is a Group Policy setting to disable Microsoft DFSS, this setting does not change DFSS behavior. This is discussed in Group Policy to disable DFSS is not functional. Consequently, XenApp Session and Published Application Importance Levels might not be enforced when DFSS has been disabled using Group Policy.

Issue/Introduction

This article provides a resolution when the CPU Resource consumed by a session on a XenApp Server mismatches the associated session and/or published application importance levels.

Additional Information

Refer to Fair Share technologies   for details
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