This chapter is an outline. The curriculum, learning objectives and
structure are settled; the prose, diagrams and code are still being written.
What is below is the plan for the chapter, not the chapter.
SQS — Production Cheat Sheet
Read time: scan
On-call reference. Written to be scanned while an alarm is firing.
Planned contents
- Reliability — at-least-once, idempotency, visibility timeout, retry, DLQ
- Performance — long polling, batch receive, batch delete, concurrency, horizontal scaling, backpressure
- Monitoring — queue depth, oldest message age, not-visible, empty receives, DLQ depth
- Security — IAM least privilege, queue policies, KMS
- Operations — the standard alarm set, common failure scenarios, triage steps, safe recovery procedures
- Never do this — purge during an incident, redrive before fixing, change two things at once
Design rules for this sheet
- Tables, diagrams and bullets. Prose only where a sentence genuinely beats a row
- Scannable at a glance; printable on a laptop screen
- Every quota and price links to
_reference/aws-facts.md - It answers "remind me", not "teach me" — the course body does the teaching
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