how can limit the grpc connection numbers?

[hwhe]

i developed a grpc server app. Based on server resource consumption considerations, i want limit the total number of the tcp connection.
eg:
i limit a server app the max connect number 100, then the 101 connect will be denied. No impact on the existing 100 connections。
Is there any way to achieve this？

[atollena]

You can try to wrap your listener into a LimitListener before passing it to the gRPC server upon creation. This will prevent the gRPC server from accepting more connections than the configured limit.

Note however that the system will still establish the TCP connections -- just the go process won't call Accept on them. Therefore, clients that connect above the limit will likely see timeouts rather than immediate errors.

If you're trying to limit the number of connections due to the high memory usage per connection, you should have a look at some of the ongoing work on this, e.g. #6309.

[hwhe]

tks for your suggestion.