Running a Performance Test on 2 load generators (Virginia Google & Mumbai Google) with 30 VU for 30 min with 1 min ramp up time. The problem is that we are seeing a higher number of VU than setup. Setup for 30 VU and ran 32 VU.
Release : SAAS
Component : BLOCKMASTER
This is more of a rounding issue with BlazeMeter.
Please refer to this KB article, section on Total Users:
Each of your thread groups was configured for 1. You specified 30 users for 2 thread groups. Each thread group will run 15 users. You specified 2 engines. Divide 15 by 2 and get 7.5. Round up 7.5 to 8. Then since you have 2 thread groups and two engines, multiply 8 x 4 and will get 32.
This is why Max Users of 32 was run.