It is possible to reduce the load by setting the access frequency and the signature of Vex.
Specifically, see the below description.
1. Perform a scan with a single thread
Vex can scan five threads at the same time per project. However using multiple threads, the load for scanning is increased.
Although it takes a longer time to complete, single thread scanning can reduce the load.
2. Use the Wait setting
There is the wait setting to set the interval at which a scanning request is sent .
Please set Web "Scan" page> "Web scan status" "Wait(ms)".
*specifing 1000 means that the interval for sending scanning requests is 1 sec. The initial value is set to 0 (milliseconds).
3. Change the signature for scanning Web application
Remove the category "Buffer Over Flow", which is high-loaded, from the applied signature, then create the scanning plan.
Please uncheck Web "Plan" page> "Buffer Over Flow" in the applied signature.
4. Change the signature for scanning Server settings
Selecting not signature groups that is listed as "(including High load signature ... ) " on the "Server Settings scanning confirmation" before scanning Server settings.