Day 21, It’s Bruce again. Tonight I am looking at Hyper-V Dynamic Memory. We first introduced Dynamic Memory in 2008 R2. Since then we have improved on the feature. Below are some facts I discovered about Dynamic Memory during my studies tonight.
- While the VM is running you can decrease the minimum memory
- While the VM is running you can increase the maximum memory
- A VM starting up requires more RAM than it does in its idle state. We allow for this with a Startup RAM configuration
- If you want a Static RAM amount set Startup, Minimum, and Maximum to same value.
Below are some links I used to study about Dynamic memory. The white paper has a good section in it ( pages 44 to 47).
Hyper-V Dynamic Memory Overview
With the Dynamic Memory improvements for Hyper-V in Windows Server 2012, you can attain higher consolidation numbers with improved reliability for restart operations. This can lead to lower costs, especially in environments that have many idle or low-load virtual machines, such as pooled VDI environments. Dynamic Memory run-time configuration changes can reduce downtime and provide increased agility to respond to requirement changes.
Windows Server 2012 Server Virtualization (White paper)