Manage resources on overcommitted KVM hosts

Consolidating workloads by overcommitting resources

From the developerWorks archives

Adam Litke

Date archived: April 22, 2019 | First published: February 08, 2011

A key benefit of virtualization is the ability to consolidate multiple workloads onto a single computer system. This consolidation yields savings in power consumption, capital expense, and administration costs. The degree of savings depends on the ability to overcommit hardware resources such as memory, CPU cycles, I/O, and network bandwidth. Technologies such as memory ballooning and Kernel Same-page Merging (KSM) can improve memory overcommitment with proper manual tuning. Autonomic reconfiguration of these controls in response to host and VM conditions can result in even greater savings. In this article, learn how to apply these techniques to increase your savings.

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