Memory hot-plugging on VMWare - reliability and alternatives

This document (7016096) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 10
SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Server 12

Situation

For the above SLES server versions, running as virtual machines on VMware vSphere, the "memory hot-plugging" feature is not consistently and reliably adding additional memory on the fly.  

The SLES server has the prerequisites correctly installed:
  • a current vmtools RPM installed on the server
  • acpiphp
  • acpi_memhotplug


Resolution

While memory hot-plugging is getting better, it's still not completely reliable. Therefore, it is recommended to use memory ballooning (instead of hot-plugging).  Memory ballooning has worked well for quite some time.

Cause


Additional Information


Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7016096
  • Creation Date: 23-Jan-2015
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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