عرض عملي: خفض p99 لمسار الدفع إلى النصف بالأدلة

خطوة بخطوة

1. Set the target and run a baseline load test at a constant rate; record percentiles.
2. Profile under load; read the flame graph and query statistics.
3. Fix the largest item (an N+1 query), re-run; record the new p99.
4. Planned mistake: tune a serializer that is 4% of time first. Fix: return to the ranked list and attack the largest remaining item.
5. Repeat until the target is met, then stop.
6. Write the before and after report with variance and caveats.

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