When running an active node (BFT leader or stake pool) it is interesting to be able to make choices on how to manage the pending transactions: how long to keep them, how to prioritize them etc.

The mempool field in your node config file is not mandatory, by default it is set as follow:

mempool:
pool_max_entries: 10000
log_max_entries: 100000

• pool_max_entries: (optional, default is 10000). Set a maximum size of the mempool
• log_max_entries: (optional, default is 100000). Set a maximum size of fragment logs