Prompt and response logs are the fastest way to build an accidental PII database. This guide shows where personal data enters an LLM feature, how to redact it before logging and before the provider, and how to keep retention and access under control.
Our single-host production server stopped accepting writes at 03:12 with no space left on device. Docker had quietly filled the disk with a 31 GB container log, old images and build cache. Here is how we found each piece and stopped it from coming back.
Our CloudWatch line went from 2,100 to 6,900 USD in a month without new services. Debug logging enabled during an incident was never turned off, and every load balancer health check produced a log line. Finding the top log groups and fixing levels cut ingestion by 81 percent.