workload-variant-autoscaler: Cache Architecture

Controller-runtime cache configuration controls which Kubernetes resources are cached in-memory. Misconfigured caches (cluster-wide watches on high-cardinality types without filters) are a primary cause of operator OOM kills.

Cache Architecture

Manager Configuration

Property	Value
Manager file	cmd/main.go
Cache scope	namespace-scoped
DefaultTransform	no
Memory limit	1Gi

Implicit Informers (OOM Risk)

Type	Source	Risk
client.ListOptions	internal/controller/configmap_bootstrap.go:52	medium

Issues

• No GOMEMLIMIT set in deployment (Go GC cannot pressure-tune)
• No cache configuration: all informers are cluster-wide (OOM risk)
• Type ConfigMap is watched but has no cache filter (cluster-wide informer)
• Type InferencePool is watched but has no cache filter (cluster-wide informer)
• Type VariantAutoscaling is watched but has no cache filter (cluster-wide informer)