**Describe the situation**
```
$ ./clickhouse-21.3.3 client --query "SELECT * FROM system.numbers_mt FORMAT Native" | pv > /dev/null
^C,1GiB 0:00:45 [ 710MiB/s] [                                                                                                                                                                                               <=>                      ]

$ ./clickhouse-21.3.3 client --compress 0 --query "SELECT * FROM system.numbers_mt FORMAT Native" | pv > /dev/null
^C,2GiB 0:00:12 [1,48GiB/s] [                                                   <=>                                                                                                                                                                  ]
```

"server", replica.compression, replica.secure, replica.priority);
            all_replicas.emplace_back(replica_pool);
            if (replica.is_local && !treat_local_as_remote)
                shard_local_addresses.push_back(replica);
        }
        ConnectionPoolWithFailoverPtr shard_pool = std::make_shared<ConnectionPoolWithFailover>(
                all_replicas, settings.load_balancing,
                settings.distributed_replica_error_half_life.totalSeconds(), settings.distributed_replica_error_cap);
        slot_to_shard.insert(std::end(slot_to_shard), default_weight, shards_info.size());
        shards_info.push_back({
            {}, 
            current_shard_num,
            default_weight,
            std::move(shard_local_addresses),
            std::move(shard_pool),
            std::move(all_replicas),
            false 
        });
        ++current_shard_num;
    }
    initMisc();
}
Poco::Timespan Cluster::saturate(const Poco::Timespan & v, const Poco::Timespan & limit)
{
    if (limit.totalMicroseconds() == 0)
        return v;
    else
        return (v > limit) ? limit : v;
}
void Cluster::initMisc()