...
In the case of some antiviruses (Microsoft Defender), it is advisable to monitor the total CPU consumption of the antivirus (msmpeng.exe) in the Task Manager. If it is high, exceptions are insufficient (and exceptions should be set for other processes, usually those that also have high CPU consumption). Other antiviruses (ESET NOD) work "undercover" and consume the CPU in the context of running processes - Task Manager thus shows e.g. high CPU consumption for postgres.exe.
There are also negative experiences with the program xagt.exe (FireEye Endpoint Security), which (probably due to missing exceptions) consumed quite a lot of CPU power (4 out of 16 available CPUs) and disabled several real-time communications (IEC 870-5-101 and IEC 870-5-104 protocols).