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VMware VMotion fails if target host does not meet reservation requirements

Symptoms

  • VMware VMotion fails at 10%
  • Cannot VMotion
  • VMotion does not work

Purpose

This article describes how VMware VMotion can fail at 10% if the target host does not have enough resources available to satisfy reserves set on the virtual machine being VMotioned.

Resolution

Ensure that the Virtual Machine does not have reservations set that exceed the available resources of the target ESX Server.
 

Determining the resources available on the destination ESX host

To determine the resources available on the destination host:

  1. Open the VMware Infrastructure Client (VI Client) and connect to the VirtualCenter Server
  2. Click on the target ESX host and click on the Configuration tab
  3. Click on the Processors section in the Hardware box and record the speed of the processor.
  4. Click on the Memory section and record the amount of physical memory available to virtual machines.
For more information on how total virtual machine memory usage is calculated, see the Resource Management Guide -- Understanding Memory Overhead:
  • For ESX Server 3.5, ESX Server 3i version 3.5, the document is available in HTML and PDF.
  • For ESX Server 3.0.1, the document is available in HTML and PDF.

Configuring virtual machine resource usage

To configure the virtual machine resource usage:

  1. Right-click on the virtual machine and click Edit Settings. 
  2. Click Resources
  3. Click CPU.
  4. Click Memory, adjusting reservation values so that they do not exceed available resources.
  5. If Advanced Memory or Advanced CPU affinity settings have been configured, disable them.
If the virtual machine has reserves configured that exceed available resources, enough resources must be made available on the target ESX host or the reserves must be lowered or removed.
 

Additional Information

For more information on troubleshooting VMware VMotion failing at 10%, see Diagnosing VMware VMotion failure at 10% (1003734) .

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Actions
  • KB Article: 1003791
  • Updated: Aug 14, 2009
  • Products:
    VMware VirtualCenter
  • Product Versions:
    VMware VirtualCenter 2.0.x
    VMware VirtualCenter 2.5.x