Apply runtime kernel tweaks to memory allocation#712
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Apply runtime kernel tweaks to memory allocation#712
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Pull Request Overview
This PR introduces runtime kernel memory management tweaks to address frequent "out of memory error 12" issues during firecracker VM startup by optimizing memory allocation behavior and cache reclamation.
- Adds a new
memory-tweaksservice that applies kernel memory tuning parameters - Configures aggressive memory compaction and higher minimum free memory thresholds
- Disables transparent hugepages to reduce memory fragmentation
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These adjustments prefer writing to disk and reclaiming cache earlier in order to avoid the frequent "out of memory error 12" we have been experiencing on firecracker VM startup. We observed very large (50%) memory caches that were not freed up in time to start the next VM, so these settings will optimize for freeing the memory sooner. Change-type: minor Signed-off-by: Kyle Harding <kyle@balena.io>
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Signed-off-by: Kyle Harding <kyle@balena.io>
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Change-type: patch Signed-off-by: Kyle Harding <kyle@balena.io>
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This PR introduces runtime kernel memory management tweaks to address frequent "out of memory error 12" issues during firecracker VM startup by optimizing memory allocation behavior and cache reclamation.
Change-type: minor
See: https://balena.fibery.io/Security/Information_Security_and_Reliability_Incident/GitHub-Runners-Failure-during-vcpu-run-Out-of-memory-(os-error-12)-130