memory.stat

Why Postgres Breaks Kubernetes container_memory_working_set_bytes Metric

Kubernetes metric container_memory_working_set_bytes is used for evicting/killing pods with too much memory use, especially if memory request < limit (don’t do this with Postgres). The metric is calculated from cgroups v2 memory.stat as current-inactive_file [source]. You’d assume it’s a good metric for memory usage in kubernetes. But with Postgres, this metric is very inaccurate for … Continue reading →