What Happens If the Mempool Becomes Congested?

When the mempool is congested, the number of unconfirmed transactions exceeds the available block space. This causes transaction fees to spike as users compete for inclusion.

Low-fee transactions can remain unconfirmed for a long time or eventually be dropped by nodes.

What Is the Difference between a Node’s Mempool and the Global Set of Unconfirmed Transactions?
What Would Happen If the Difficulty Did Not Adjust?
How Long Does a Transaction Typically Remain in the Mempool If Unconfirmed?
How Does the Concept of ‘Liquidity’ in Options Trading Compare to Transaction Flow in a Congested Mempool?
What Is ‘Replace-by-Fee’ (RBF)?
What Is the Relationship between the Threshold ‘T’ and the Security Level of the Oracle?
How Do Full Nodes Share Mempool Data to Improve Network-Wide Fee Estimation?
How Does TVL Relate to a Protocol’s Security?

Glossar