# What breaks at ten times the size

Prompt · Performance and scale · P05

Names the first thing to break if the project takes off, before it does.

## Prompt

```text
Investigate what happens when this application's data volume and concurrent users increase tenfold. Identify the first likely bottlenecks using evidence from its current design.
```

**What it returns:** Current sizes and rates, the projected tenfold numbers, and the limit each bottleneck hits (pool size, plan limit, query cost).

**Skip it when:** Products with no growth in sight; revisit quarterly.

**Tools:** Database stats, hosting plan limits, current traffic numbers.

**Changes:** Changes nothing

**Sessions:** One session

## Related

- [Queries that grow badly](https://www.atlasscope.dev/prompts/queries-that-grow-badly): Finds the database queries that will be the first to slow down as tables grow.
- [Parallel work with no limit](https://www.atlasscope.dev/prompts/parallel-work-with-no-limit): Finds work run in parallel with no limit, which can swamp the database connections or an outside service.

Source: https://www.atlasscope.dev/prompts/what-breaks-at-ten-times-the-size