Kubernetes DNS: The ndots:5 Latency Tax
Every DNS query in K8s makes 5 failed lookups before succeeding. ndots:5 default causes 100ms+ latency. Here's how to fix it properly.
#latency
4 posts
Kubernetes CPU Throttling Autopsy: Why p99 Latency Explodes at 40% CPU Usage
CPU looks OK but tail latency is catastrophic. I'll show how to correlate CFS throttling with latency spikes and why removing CPU limits can paradoxically help.
eBPF Off-CPU Analysis: Finding Latency That Metrics Miss
CPU is at 20% but latency is 500ms. Standard profilers show nothing. The app is waiting, not computing. I show how to use eBPF to find what it's waiting for.
Go p99 Latency Cliffs: Nested context.WithTimeout Timer Storms
Periodic latency spikes that look like network jitter. The real cause: nested timeouts creating thousands of timers that pressure the Go runtime timer heap and trigger GC scanning.