Stampede
Level 10 of 41Fix the board. Turn every goal green.
- Traffic
- 5,000 req/s · reads only
- Limit
- Postgres answers about 500 reads/s
- Bill
- Redis cache4 USD/mo
- Postgres4 USD/mo
8 of 30 USD/mo
Goals
Not tested yet
At 0:20, all readers request one expired key. The database cannot serve 5,000 duplicate fills each second. Stop the miss burst and keep p99 below 150 ms.
0:20. One hot key expired. Graph: database CPU jumps to its limit as 5,000 copies of one read arrive each second.
Parts you can add: Redis cache, Memory cache. At most 16 parts. Budget: 30 USD/mo.
Tap a part to add it, or drag it onto a trace.Click a part to add it, or drag it onto a trace.