Lessons Learned Building a Production Memory-Overcommit Solution

Explore the challenges and solutions in developing a production-ready memory overcommit system in this 21-minute conference talk by Florian Schmidt and Ivan Teterevkov from Nutanix. Delve into basic reclamation techniques, double swapping, and hybrid overcommit strategies. Learn about the implementation of an overcommit memory buffer and the importance of memory statistics. Discover a simple yet effective memory overcommit algorithm and understand the concept of Working Set Size (WSS). Gain insights into live migration techniques, including methods to identify swapped-out pages. Conclude with a discussion on future work and valuable lessons learned from building and implementing this solution in a production environment.

Intro
Building a Practical MemoC Solution
Basic Reclamation Techniques
Double Swapping
Hybrid Overcommit
Overcommit Memory Buffer
Memory Stats
A Simple Memory Overcommit Algorithm
Working Set Size (WSS)
Live Migration (continued)
Identify Swapped-out Pages
Future Work
Lessons Learned