Presently, the connector will always check the JDBC driver metadata if a table exists and what its column details are, even when schema.evolution is disabled. When the user sends many rows in a small window, this can create an excessive CPU load on the target database.

See https://debezium.zulipchat.com/#narrow/channel/302529-community-general/topic/How.20to.20Reduce.20Metadata.20Queries.20in.20Debezium.20JDBC.20Sink.20Connect/near/493251086

We should consider caching TableDescriptor objects so that we reduce the number of calls to Dialect#tableExists and Dialect#readTable and avoid doing this on each buffer flush, which can be frequent.