Correct settings expandpools

In Hurtworld I got warnings on my server : uLink detected risk for major GC spikes. Unreliable outgoing BitStreamPool (isTypesafe: True) overflow, pool capacity 1000, usage was 2533.

I found out that the pool capacity can be set above 1000 but how?
Expandpools? But with which settings?

 

Expanding your pools may be just band-aiding the issue producing these messages. This is probably from a significant CPU spike/frame drop on your server, probably caused by a mod doing something nasty like FindObjectsOfType<>(). I would see these messages as a symptom, not the problem.