vCenter Server performance issues after increasing memory

Products

• VMware vCenter Server

Issue/Introduction

Update the memStopInMB to the updated memory limit in the vCenter Server.

Symptoms:

The vCenter Server’s performance is deteriorated after the memory allocated to vCenter Server is increased.

Environment

VMware vCenter Server 6.0.x

Cause

The memStopInMB parameter in the vCenter Server is not automatically updated when more memory is allocated to the machine.

 

Note: This issue does not occur on the vCenter Server Appliance.

Resolution

The issue is resolved in vCenter Server 6.0 Update 3.

 

To workaround the issue, determine the appropriate value for memStopInMB and then configure.

 

To determine the new value for memStopInMB

1. Open a Windows command prompt.
2. Navigate to C:\Program Files\VMware\vCenter Server\visl-integration\usr\sbin with this command:
   
   cd C:\Program Files\VMware\vCenter Server\visl-integration\usr\sbin
   
   
3. Run this command to determine the correct value for memStopInMB:
   
   .\cloudvm-ram-size.bat vpxd

 

Adjusting the memStopInMB parameter in the vCenter Server

1. Connect to the vCenter Server using the vSphere Client and administrator credentials.
2. Select Administration > vCenter Server Settings.
3. Select Advanced Settings.
4. Select Edit...
5. Change the value of the config.vpxd.memChecker.memStopInMB key to the number returned by the cloudvm-ram-size utility.
6. Click OK.
7. Restart the vCenter Server services. For more information, see:
   • Stopping, starting, or restarting VMware vCenter Server 6.0 services (2109881)
   • How to stop, start, or restart vCenter Server Appliance services (2054085)