Hi Devs,

I'm running some tests to figure out the maximum number of clients that can be supported by change stream. I basically took the script from SERVER-32946 and changed the number of clients. I tested it on my own machine with three local replicas. When the client number is too high, like 100000, the primary replica constantly complains about "Too Many Open Files". I tried to tune up the ulimit to 65536, but it didn't help.

I wonder probably the change stream is not designed for such use cases? What would be the maximum number of supportable clients in this case? Thank you!