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Your Microservices Aren’t Slow — You Just Can’t See Them
Why Distributed Tracing Became Non-Negotiable in Modern Go Systems
syarif4 min read·Just now--
The incident started with a Slack message:
“Checkout feels slow. Not broken. Just… slow.”
No alerts fired.
No CPU spikes.
No memory pressure.
Dashboards were green across the board.
And yet users were waiting 4–6 seconds to place an order.
We had 12 Go microservices in that request path. Each had logs. Each had metrics. Each was “healthy.”
But none of them told us what happened to that request.
That was the day I realized something uncomfortable:
Microservices don’t become complex when they scale.
They become complex the moment you can’t see causality.
And logs are not causality.
The Illusion of Observability
Most Go teams start responsibly.
We add structured logging.
We export Prometheus metrics.
We build Grafana dashboards.
We feel observant.
