RSS Contracts: Stop OOMKilled Java Pods in Kubernetes by Testing RSS as an API
Use cgroup RSS budgets, CI sampling, and runtime headroom to catch JVM memory regressions before they hit production.
#jvm
4 posts
JVM Native Memory in Kubernetes: Why Your Pod Gets OOMKilled with 50% Heap
Heap is 50% full but pod gets OOMKilled. I'll show how to track native memory (Metaspace, threads, NIO) and prevent container memory issues.
Java OOMKilled With Stable Heap: Native Memory, Direct Buffers, and glibc Arenas
Heap metrics look fine, GC is happy, but the container keeps dying. The culprit: native memory from direct buffers, JNI, and glibc memory allocator fragmentation.
JVM Metaspace OOM in Kubernetes: Why MaxMetaspaceSize Alone Won't Save You
Pod OOMKilled despite MaxMetaspaceSize set. The cause: Metaspace grows outside heap, container memory limit doesn't account for it, and class unloading isn't happening.