Go GOMAXPROCS in Containers: The CPU Detection Problem
Go sees 64 host CPUs but your container has 2 CPU limit. GOMAXPROCS=64 causes excessive context switching and throttling. Here's the fix.
#go
8 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.
Structured Logging Performance: When Your Logger Becomes the Bottleneck
At 50k logs/sec, JSON serialization eats 30% CPU. Standard library encoding/json is slow. I benchmark zap vs zerolog vs slog with real numbers.
When Prepared Statements Make PostgreSQL 10× Slower: Generic Plan Trap
Same query, same params, but prod is slow and staging works fine. I'll show how to reproduce the generic plan problem with pgBouncer, Java/Go and how to fix it.
gRPC Deadline Propagation: Preventing Cascading Failures
Frontend gives up after 5s but backend keeps working for 30s. Without deadline propagation, you waste resources on doomed requests. I show how to implement it in Go.
HTTP Keep-Alive Connection Reset: Why Your Requests Fail with 'Connection Reset by Peer'
Sporadic 'connection reset by peer' errors in production. I'll show how keep-alive timeout mismatches between client and server cause this and how to fix it.
Redlock vs PostgreSQL Advisory Locks: When You Don't Need Redis for Distributed Locking
Adding Redis just for distributed locks? PostgreSQL advisory locks might be enough. I compare both with failure scenarios and performance benchmarks.
Adaptive Concurrency Limits: Stop Guessing Thread Pool Sizes
Thread pool 200 because that's what Stack Overflow says? Netflix's algorithm adjusts concurrency automatically based on latency. I show how it works with benchmarks.