Selecting just the bins you need will save on network bandwidth usage between Aerospike and client. From an Aerospike point of view, you just utilizing the network send buffers more efficiently when retrieving selected bins only. You have to decide between the data size in your bins - for e.g. does each bin has 1KB data (large => selection really helps) or 8 bytes (tiny amount - may be not much impact to bandwidth, especially if you transactions per second are very low) of data?, your available network bandwidth - Mbps? Gbps? - and what your application needs? are you pulling 10 bins at a time but eventually need all 200 (then don’t select) or only need 10 bins (use selected bins)?