№51
When One Go Binary Beats Three Separate Kubernetes Services
I needed three ingestion services, but I did not need three Go binaries.
Devlog 5 min
Devlog
Real production work debriefed after the fact — what broke, what it cost, and the lessons carried forward.
5 published entries
All writing
№50
Streaming OTLP JSON in Go Without Loading the Payload
The collector had CPU headroom and responsive Kafka producers, yet one OTLP batch made the hot path queue. The parser retained the whole payload while four downstream writers finished.
Devlog 4 min
№48
Kafka Rejects Records Over 1 MB. LLM Spans Do Not Care.
A record-size test exposed an accounting error: an 870 KiB text field fit, while an 880 KiB field did not.
Devlog 7 min
№46
We Put Full-Text Search in PostgreSQL, Then ClickHouse. Both Were the Wrong Place.
The logs table stored trace IDs, users, token counts, latency, prompt input, model output, metadata, and variables. We used the same table to show one trace, graph cost by day, filter a feature’s recent spans, and find text a user remembered typing three weeks ago.
Devlog 6 min
№44
PostgreSQL Was Down Again: Rebuilding LLM Trace Ingestion
At 6 p.m. on December 19, 2025, the product was down again.
Devlog 12 min