Linux Memory Management and Containers
Talkat ContainerCon @ OSS EU 2023 · on Thursday, 2023-09-21· at 11:00· Room 0A (Floor 0), Abandoibarra Etorb., 4, 48011 Bilbao, Bizkaia, Spain·
summary
Covers concrete Linux behavior: cgroups v2 maps Docker/Podman/Kubernetes flags to kernel files so --memory sets memory.max, --memory-reservation writes memory.low, and memory.swap.max = memory.swap − memory. Demonstrations use atop and the use_mem tool to show page cache growing to ~10 GB, tmpfs and shm allocations of 4 GB, repeated 5 GB mallocs triggering swap and an OOM kill, and a Pod with 50 MiB limit that crashloops when use_mem exhausts memory; swappiness defaults to 60 and OOM selection follows the per-process oom_score.
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chapters (4)
- 0:00Linux memory management intro
- 27:35Detailed Linux memory management
- 1:07:23Containers memory with cgroups
- 1:34:39Summary & Q&A
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