How Does a Node’s Mempool Size Limit Influence Its RBF Relay Policy?

A node's mempool size limit (typically measured in megabytes) directly influences its RBF relay policy during network congestion. When the mempool is full, the node must evict lower-fee transactions to make room for new, higher-fee ones.

The RBF policy ensures that if a new transaction is a replacement, it must meet the minimum fee-increase rule to justify the eviction of the old transaction, thus optimizing the use of the limited mempool space for the most profitable transactions.

How Is the Optimal Collateral Amount Determined for an Oracle Node?
What Is the Economic Consequence of Limited Block Space?
How Does the Order of the Base Point Relate to the Private Key Space?
What Is the Minimum Number of Nodes Required to Form a Valid Threshold Signature?
How Do Nodes Manage the Size and Contents of Their Mempools?
What Is the Replace-by-Fee (RBF) Protocol and How Is It Activated?
How Does a High Volume of RBF Transactions Affect the Overall Size of the Mempool?
How Does a High Volume of Zero-Fee Transactions Affect Network Congestion?

Glossar