v.22.3Improvement

Use Connection Pool for Hive Metastore Client

Use connection pool for Hive metastore client. #34940 (lgbo).
Use connection pool for Hive metastore client.

Why it matters

Improve connection management and performance when interacting with the Hive metastore by using a connection pool. This reduces overhead from establishing new connections and enhances efficiency for multiple queries or operations.

How to use it

The connection pooling for Hive metastore client is enabled internally in the ClickHouse server after updating to this version. Users do not need to change their queries but should ensure their Hive integration is configured correctly to benefit from pooled connections.