How Does a Node Manage Its Mempool Size?
Nodes typically have a configurable limit on the total size of their mempool (in MB or number of transactions). When the limit is reached, nodes use a policy, usually based on the lowest fee-per-byte, to evict transactions to make room for new, higher-fee ones.
This ensures the mempool remains manageable.
Glossar
Node
Entity ⎊ A Node is an individual participant computer that validates transactions, maintains a copy of the ledger, and contributes to the overall security and decentralization of the cryptocurrency Network.
Transaction Priority
Determinant ⎊ Transaction priority within cryptocurrency, options trading, and financial derivatives represents the hierarchical ordering of unconfirmed transactions awaiting inclusion in a block.
Default Mempool Size
Parameter ⎊ Default Mempool Size specifies the initial or standard capacity allocated by a node's software to hold unconfirmed transactions awaiting inclusion into a block.