How Linux Kernel Samepage Merging Reduces Memory Waste

In this episode of The Linux Podcast with Fexingo, Lucas and Luna dig into Kernel Samepage Merging (KSM) — the Linux kernel feature that deduplicates identical memory pages across processes. They explain how KSM works, why it matters for virtualization and container workloads, and where it can actually hurt performance. Using the classic example of multiple virtual machines running the same guest OS, they break down the trade-offs between memory savings and CPU overhead. They also touch on practical tuning: when to enable KSM, how to monitor its effectiveness with tools like ksmctl, and why it's often disabled by default in modern hypervisors like KVM. This episode gives you a concrete mental model of memory deduplication in Linux, plus a few real-world considerations for your own servers.

#Linux #Kernel #KSM #MemoryManagement #Virtualization #KVM #Containers #Docker #SystemAdministration #DevOps #ServerStack #OpenSource #Technology #FexingoBusiness #BusinessPodcast #CloudComputing #MemoryDeduplication #LinuxPerformance

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