Tagged: observability

2 articles

· 2 min read

Does your health check use the same path as your traffic?

A Google Cloud outage severed inter-zone traffic while health checks on a separate address space kept reporting healthy. Probes that avoid the data path measure the wrong thing.

#observability#health-checks#incident-analysis

· 2 min read

How do you read a latency histogram?

The average is a fiction and the p99 is a person. Reading latency distributions the way the review reads them, shape first.

#reviews#latency#observability