SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
VMware Resources: Reservations - Limits - Shares
Summary: A clear explanantion about VMware VM Reservations, limits and shares.
Date: Around 2014
Refactor: 1 May 2025: Checked links and formatting.
VMware Change NIC VM Manually
Summary: How to manually change the NIC in an vSphere VM.
Date: Around 2011
Refactor: 1 May 2025: Checked links and formatting.
This is a procedure to change the network adapter of a VM after the hardware version has been upgraded to version 7. This is only compulsory when you were using the old VLANCE adapter. This adapter will simply disappear from your guest as it is no longer supported. As far as I've noticed all other adapters keep working fine (but should be upgraded to benefit from the new performance possibilities).
VMWare Memory Management
Summary: Background and practical tips on VMs Memory Management & Performance.
Date: Around 2014
Refactor: 1 May 2025: Checked links and formatting.
This story is a follow-up on Vmware CPU Management and Performance and will show you how to find performance issues regarding memory.
When troubleshooting memory performance the most important thing to find out is whether your host is having memory issues (as in you overcommitted memory and need to add more memory to the host) or whether the problem is restricted to the VM (as in you need to allocate more memory to the affected VM). If the host is affected you can notice pretty fast because of the predefined VMware Alarms in vCenter. This however, is just an indication of percentage of memory allocation, not whether this is a problem. To dive into the problem, we need performance graphs.
Script: powerCLI: vSphere Host Performance Script
Summary: Use this powershell script to query all hosts and their performance status.
Date: 25 May 2014
Refactor: 1 May 2025: Checked links and formatting.
This script will query all hosts and audit their performance doing. It will tell you your core overcommitment, number of VMs, and more.