New comment by RGJorge in "Traceway: MIT-licensed observability stack you can self-host in ~90s"

RGJorge — Wed, 13 May 2026 14:12:55 +0000

The "easy to set up" framing usually skips the hardest part: whether the metric you're alerting on is meaningful. Most stacks pull container memory from cAdvisor's `container_memory_usage_bytes`, which is the same broken `memory_stats.usage` that `docker stats` reports — includes the kernel's reclaimable page cache. For DB containers with hot working sets, that metric stays at 95%+ constantly. Beautiful Grafana dashboards alerting on a structurally wrong number. The fix is computing real anonymous memory (subtract active_file + inactive_file) — most stacks leave that as a custom exporter exercise. Curious how Traceway handles this out of the box.

Hacker News: RGJorge

New comment by RGJorge in "Traceway: MIT-licensed observability stack you can self-host in ~90s"