The aim of breakpoint testing (also known as capacity testing) is to determine the maximum possible load before some criterias (thresholds) can not be met.
You can run a breakpoint test by setting the property test.breakpoint to true.
The load test will then rerun with increased load after it´s finished.
This will continue until a threshold is not met or the maximum amount of loops are reached.
Breakpoint tests should be configured like a stress test. See here for more information about stress testing: https://k6.io/docs/test-types/stress-testing/
Please follow this pattern when using breakpoint testing.
Inside options there has to be a scenarios key.
Inside scenarios there has to be a breakpoint key, which includes the breakpoint scenario.
You can also add other scenarios.
Inside breakpoint there has to be a stages key.
Here you can add as many stages as you want inside the array.
One stage always consists of a duration and a target.
See here for more information about the load test configuration in general