diff --git a/consensus/miner/miner.go b/consensus/miner/miner.go
index 4664775b..782ea9e1 100644
--- a/consensus/miner/miner.go
+++ b/consensus/miner/miner.go
@@ -101,7 +101,6 @@ func (miner *Miner) Start(force bool) bool {
 // Stop stop worker
 func (miner *Miner) Stop() bool {
 	if !atomic.CompareAndSwapInt32(&miner.mining, 2, 3) {
-		log.Error("miner already stopped")
 		return false
 	}
 	log.Info("Stopping mining operation")
diff --git a/txpool/config.go b/txpool/config.go
index 328291d0..5b661af1 100644
--- a/txpool/config.go
+++ b/txpool/config.go
@@ -48,7 +48,7 @@ type Config struct {
 var DefaultTxPoolConfig = &Config{
 	Journal:        "transactions.rlp",
 	Rejournal:      time.Hour,
-	PriceLimit:     1000000000,
+	PriceLimit:     100000000000,
 	PriceBump:      10,
 	AccountSlots:   128,
 	GlobalSlots:    4096,