M312:Mongos connections threshold

The maximum limit for connections enabled by default is 100 to the mongod which is part of a replica set or standalone.

When we have a sharded cluster do the same value remains for the mongos?

Hi :wave: @Mugurel_Frumuselu,

Apologies for the late response!

The maxPoolSize of 100 is a driver-side parameter that is intended for the application connection to MongoDB.

Sharding has different pool size parameters which you can read here:

If you have any doubts, please feel free to reach out to us.

Thanks,
Kushagra

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