write_through_distributed_cache_buffer_size
Only has an effect in ClickHouse Cloud. The maximum size of the buffer which is written to distributed cache servers, per write buffer. It is independent of the buffer which is written to the object storage: that one keeps growing towards the upload part size. If 0,DBMS_DEFAULT_BUFFER_SIZE (1 MiB) is used. The buffer starts at adaptive_write_buffer_initial_size and grows up to this size only as the stream is written, so that a part does not allocate it for every stream it writes.