Demo: finding a slow span in a saga
On This Lesson 3 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
diagnose slowness using telemetry only. Prepares MID-047-LAB1.
Draft outline details
Step by step
- Start from the symptom: p95 of checkout rose.
- Pick slow traces; compare with fast ones.
- Find the widest span: a payment call with retries.
- Planned mistake: blame the database because "it is usually the database"; the trace shows only 5 ms in SQL. Follow the evidence instead.
- Confirm with the metric of payment retries and the log lines of the same trace.
- Write a short diagnosis: symptom, evidence, cause, proposed fix.
Practice
Apply this lesson with the module's lab, exercises and quiz.
Marking a lesson complete is optional and you can undo it any time. Your progress stays in this browser.