Operations performed in vSphere Web Client takes long time to complete
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Operations performed in vSphere Web Client takes long time to complete


Article ID: 341958


Updated On:


VMware vCenter Server VMware vSphere ESXi


If you are using the vSphere Web Client over the vSphere Client, you see:
  • Performance degradation when you create, delete or perform configuration changes to objects.
  • Timeouts when updating objects in the vSphere Web Client.
  • Concurrent session errors when configuring a virtual machine.
  • High CPU usage for the Inventory Service and vCenter Server Service process.


VMware vCenter Server 6.0.x
VMware vSphere Web Client 6.0.x


This issue occurs under the following conditions:
  • You are using vCenter Server and vSphere Web Client 6 Update 2
  • A medium or large size inventory in the vCenter Server
  • Storage I/O Control enabled on some or all datastores


This issue is resolved in VMware vCenter Server 6.0 Update 3, available at VMware Downloads.
To work around this issue, disable Storage I/O Control.

To disable the Storage I/O Control:
  1. Select a datastore in the vSphere Client inventory and click the Configuration tab.
  2. Click Properties.
  3. Under Storage I/O Control, select Disabled.
  4. Click Close.

Note: This setting is specific to the datastore and not to the host.

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