Feb 21, 2019 02:15 AM|Fei Han - MSFT|LINK
Welcome to ASP.NET forums.
I am facing memory utilisation issue with self hosted signalr
If you exchange large messages between hub and clients, this may cause memory issues, you can try to reduce the size of SignalR message(s).
Besides, by default, SignalR retains 1000 messages in memory per hub per connection. you can reduce the value of DefaultMessageBufferSize to reduce the amount of server memory used.