Operations performed in vSphere Web Client takes long time to complete

Products

• VMware vCenter Server
• VMware vSphere ESXi

Issue/Introduction

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.

Environment

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

Cause

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

Resolution

This issue is resolved in VMware vCenter Server 6.0 Update 3.

To work around this issue, disable Storage I/O Control using the below steps:

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.

Additional Information

• Unmanaged workload is detected on datastore running SIOC (1020651)

• Disabling Storage I/O Control in ESXi hosts fails with the error: Configure Storage I/O Control on Datastore datastore_name The operation is not supported on the object