v.19.1Improvements

Decreased the Number of Connections in Case of Large Number of Distributed Tables in a Single Server

Decreased the number of connections in case of large number of Distributed tables in a single server. #3726 (Winter Zhang)
Reduced the number of simultaneous connections when handling a large quantity of Distributed tables on a single ClickHouse server.

Why it matters

This feature addresses the problem of excessive connections generated by numerous Distributed tables on one server, which can lead to resource exhaustion and degraded performance. By limiting the connection count, it improves server stability and resource management.

How to use it

This optimization is applied automatically by the server to efficiently manage connections for multiple Distributed tables. No explicit user configuration is required.