Load Testing · Senior · Question 43 of 76
Latency jumps for orders of one popular product only. What is a likely cause?
- 1Lock contention or a hot partition on that single row or key
- 2The CDN doesn't cache product pages for that item
- 3The load tool sends larger payloads for that product
Show the answer
Correct answer: Lock contention or a hot partition on that single row or key
Explanation
All updates to one inventory row serialize. Per-key metrics or DB lock waits reveal it; the fix may be sharding counters or a different design.