diff --git a/x/oracle/keeper/common/types.go b/x/oracle/keeper/common/types.go
index e4df3eaf4..993c20674 100644
--- a/x/oracle/keeper/common/types.go
+++ b/x/oracle/keeper/common/types.go
@@ -19,6 +19,9 @@ var (
 	// maxDetId each validator can submit, so the calculator can cache maximum of maxDetId*count(validators) values, this is for resistance of malicious validator submmiting invalid detId
 	MaxDetID int32 = 5
 
+	// for each token at most MaxSizePrices round of prices will be keep in store
+	MaxSizePrices = 100
+
 	// consensus mode: v1: as soon as possbile
 	Mode types.ConsensusMode = types.ConsensusModeASAP
 )
diff --git a/x/oracle/keeper/prices.go b/x/oracle/keeper/prices.go
index 309054245..fefd74e17 100644
--- a/x/oracle/keeper/prices.go
+++ b/x/oracle/keeper/prices.go
@@ -5,6 +5,7 @@ import (
 
 	sdkmath "cosmossdk.io/math"
 	assetstypes "github.com/ExocoreNetwork/exocore/x/assets/types"
+	"github.com/ExocoreNetwork/exocore/x/oracle/keeper/common"
 	"github.com/ExocoreNetwork/exocore/x/oracle/types"
 	"github.com/cosmos/cosmos-sdk/store/prefix"
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -30,14 +31,20 @@ func (k Keeper) GetPrices(
 
 	val.TokenID = tokenID
 	val.NextRoundID = nextRoundID
-	val.PriceList = make([]*types.PriceTimeRound, nextRoundID)
+	var i uint64
+	// i := max(1, nextRoundID-uint64(common.MaxSizePrices))
+	if i = nextRoundID - uint64(common.MaxSizePrices); i < 1 {
+		i = 1
+		val.PriceList = make([]*types.PriceTimeRound, nextRoundID)
+	} else {
+		val.PriceList = make([]*types.PriceTimeRound, common.MaxSizePrices)
+	}
 	// 0 roundId is reserved, expect the roundid corresponds to the slice index
 	val.PriceList[0] = &types.PriceTimeRound{}
-	for i := uint64(1); i < nextRoundID; i++ {
+	for ; i < nextRoundID; i++ {
 		b := store.Get(types.PricesRoundKey(i))
 		val.PriceList[i] = &types.PriceTimeRound{}
 		if b != nil {
-			// should always be true since we don't delete prices from history round
 			k.cdc.MustUnmarshal(b, val.PriceList[i])
 			found = true
 		}
diff --git a/x/oracle/keeper/single.go b/x/oracle/keeper/single.go
index c1f60e652..1bdec9d4b 100644
--- a/x/oracle/keeper/single.go
+++ b/x/oracle/keeper/single.go
@@ -199,12 +199,15 @@ func ResetAggregatorContextCheckTx() {
 	agcCheckTx = nil
 }
 
+// setCommonParams save static fields in params in memory cache since these fields will not change during node running
+// TODO: further when params is abled to be updated through tx/gov, this cache should be taken care if any is available to be changed
 func setCommonParams(p *types.Params) {
 	common.MaxNonce = p.MaxNonce
 	common.ThresholdA = p.ThresholdA
 	common.ThresholdB = p.ThresholdB
 	common.MaxDetID = p.MaxDetId
 	common.Mode = p.Mode
+	common.MaxSizePrices = int(p.MaxSizePrices)
 }
 
 func ResetUpdatedFeederIDs() {