How Do Different Nodes’ Mempool Sizes and Policies Affect Transaction Visibility?
Different nodes' mempool sizes and policies directly affect a transaction's visibility across the network. Nodes with a smaller memory limit or stricter minimum relay fee policy will reject or drop low-fee transactions more quickly.
This means a low-fee transaction may only be visible to a small subset of nodes, primarily those with more permissive policies. Reduced visibility lowers the probability that the transaction will reach a miner who is able and willing to include it in a block.
A more widely visible transaction has a higher chance of confirmation.
Glossar
Nodes
Architecture ⎊ Nodes, within distributed ledger technology, represent specific points of data storage and processing capacity integral to network operation, differing from centralized systems through inherent redundancy and decentralization.
Minimum Relay Fee
Threshold ⎊ The Minimum Relay Fee is a node-specific, non-consensus parameter defining the lowest transaction fee rate, typically expressed in satoshis per virtual byte (sat/vByte), that a full node will accept for an unconfirmed transaction to enter its memory pool and be relayed to other peers.