Self Hosted instance sometimes throws "AppwriteException: null, XMLHttpRequest error. (0)"

Hey! I have a self hosted appwrite instance and a flutter web app. It all works well, but when I have more traffic the flutter client often throws an Exception: "AppwriteException: null, XMLHttpRequest error. (0)." It only happens if there are many active users (round about 300 realtime connections). Also the web socket connection failes some times then: "WebSocketChannelException: WebSocket connection failed." The cpu usage while that time is still fine. It never gets above 80%. Im using a server with 2 intel VCPUS and 8GB RAM.

TL;DR

The user is experiencing an "AppwriteException: null, XMLHttpRequest error. (0)" and WebSocket connection failures when there are many active users (around 300). The CPU usage does not exceed 80%. The user is using a server with 2 Intel VCPUs and 8GB RAM. Solution: It is suggested that the user may need a server with more cores to handle the increased traffic. They should consider upgrading their server to handle the high number of concurrent connections.