By default, multiple test cases are executed concurrently (in parallel). Every test case has a Mix Weight configuration property. A mix weight is a relative frequency (in units) of the Test Case replay in the mix. It is also a relative probability that a virtual user will be assigned to this test case. VUs are distributed between the Test Cases proportionately to their Mix Weights.
Note: Every VU, after its instantiation, is assigned to a specific Test Case for the entire duration of the test. For every subsequent VU, test cases are selected in round-robin order, while skipping some of them to achieve the VU distribution corresponding to the mix weights.
The mix weight can be set as a percentage, as the number of VUs or as a proportion. For example, to set 80 VUs for TC1, 70 VUs for TC2 and 50 VUs for TC3, the mix weights could be set in any of the following three ways:
| Number of VUs | Percentages | Ratio | |
|---|---|---|---|
| TC1 Mix Weight | 80 | 40 | 8 |
| TC2 Mix Weight | 70 | 35 | 7 |
| TC3 Mix Weight | 50 | 25 | 5 |
To set a test case mix weight, change the Mix Weight in the property grid.
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