fix(mempool): use no-op mempool as default

CHANGELOG.md

@@ -107,6 +107,7 @@ Every module contains its own CHANGELOG.md. Please refer to the module you are i
 * (crypto) [#19691](https://github.com/cosmos/cosmos-sdk/pull/19691) Fix tx sign doesn't throw an error when incorrect Ledger is used.
 * [#19833](https://github.com/cosmos/cosmos-sdk/pull/19833) Fix some places in which we call Remove inside a Walk.
 * [#19851](https://github.com/cosmos/cosmos-sdk/pull/19851) Fix some places in which we call Remove inside a Walk (x/staking and x/gov).
+* (baseapp) [#19970](https://github.com/cosmos/cosmos-sdk/pull/19970) Fix default config values to use no-op mempool as default.
 
 ### API Breaking Changes
 

server/config/config.go

@@ -263,7 +263,7 @@ func DefaultConfig() *Config {
 			},
 		},
 		Mempool: MempoolConfig{
-			MaxTxs: 5_000,
+			MaxTxs: -1,
 		},
 	}
 }

types/mempool/sender_nonce.go

@@ -20,7 +20,7 @@ var (
 	_ Iterator = (*senderNonceMempoolIterator)(nil)
 )
 
-var DefaultMaxTx = 0
+var DefaultMaxTx = -1
 
 // SenderNonceMempool is a mempool that prioritizes transactions within a sender
 // by nonce, the lowest first, but selects a random sender on each iteration.