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October 24-26, 2018 - Edinburgh, Scotland, UK
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Wednesday, October 24 • 16:15 - 16:55
Memory Overcommit for Overcommitted Admins - Jonathan Davies, Nutanix

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Overcommitting memory is a useful tool for increasing VM density but typically comes with a increased administration cost as either a) "safe" memory limits need to configured for each VM; or b) unexpected performance problems need to be identified and addressed.

An automatic and lightweight method for determining a VMs working set is described with suggestions on how this could be used in clustered and non-clustered environments to increase VM density with less of an administrative burden.

The presentation also includes a look at the simple model of Linux's paging subsystem that was used to rapidly prototype and evaluate the method's behaviour with different workloads.

avatar for Jonathan Davies

Jonathan Davies

Software Engineer, Nutanix
Jonathan is a software engineer working on Nutanix's Acropolis Hypervisor (AHV). He specialises in performance engineering.Jonathan has worked in virtualization for over 10 years and was previously System Architect for XenServer at Citrix.Jonathan holds a PhD in Computer Science... Read More →

Wednesday October 24, 2018 16:15 - 16:55 BST
Lowther Suite