Hi,
You are referring to the write section the file which control the capacity of the NES in terms of how many agents it can handle is defined in nimi_config.xml file on <NES install Dir>/conf
There are two configuration which control the whole mechanism
1: capacity: You can consider it as an upper-limit of the total number of agents NES going to allow connections to
2: warn-capacity: It is the number of agents always going to get connection if we cross this limit you may notice some agents going offline from time to time or not getting connected to NES.
for example: you have a NES A and total number of agents in your ENV say 250. NES A have capacity of 200 and warn-capacity of 190. With this configuration NES will allow connection to 200 Agents at max but post 190 it will raise an alarm. So consider a scenario now where you have 198 Agents connected to this NES, now in case if this agent receive a new request of 5 more agents it will preserve 190 active connections and can only accommodate another 10 to reach capacity of 200, to do so it will have to decline over max 3 agents so either it can deny from new request or can close connection of existing agents (this is something intrinsic to product).
Beside that the above value is the default value and there is in-build system capacity how max connection it can change for example in 6.3 it can have around 500 agents so you can change the above two configuration accordingly.
Please check your respective release document for that benchmarks.
Regards,
Saurabh