diff --git a/internal/proxy/simple_rate_limiter.go b/internal/proxy/simple_rate_limiter.go
index 65fcc80551..dd06057c8f 100644
--- a/internal/proxy/simple_rate_limiter.go
+++ b/internal/proxy/simple_rate_limiter.go
@@ -217,14 +217,20 @@ func (m *SimpleLimiter) SetRates(rootLimiter *proxypb.LimiterNode) error {
 }
 
 func initLimiter(rln *rlinternal.RateLimiterNode, rateLimiterConfigs map[internalpb.RateType]*paramtable.ParamItem) {
-	log := log.Ctx(context.TODO()).WithRateGroup("proxy.rateLimiter", 1.0, 60.0)
 	for rt, p := range rateLimiterConfigs {
-		limit := ratelimitutil.Limit(p.GetAsFloat())
+		newLimit := ratelimitutil.Limit(p.GetAsFloat())
 		burst := p.GetAsFloat() // use rate as burst, because SimpleLimiter is with punishment mechanism, burst is insignificant.
-		rln.GetLimiters().Insert(rt, ratelimitutil.NewLimiter(limit, burst))
-		log.RatedDebug(30, "RateLimiter register for rateType",
+		old, ok := rln.GetLimiters().Get(rt)
+		if ok {
+			if old.Limit() != newLimit {
+				old.SetLimit(newLimit)
+			}
+		} else {
+			rln.GetLimiters().Insert(rt, ratelimitutil.NewLimiter(newLimit, burst))
+		}
+		log.Debug("RateLimiter register for rateType",
 			zap.String("rateType", internalpb.RateType_name[(int32(rt))]),
-			zap.String("rateLimit", ratelimitutil.Limit(p.GetAsFloat()).String()),
+			zap.String("rateLimit", newLimit.String()),
 			zap.String("burst", fmt.Sprintf("%v", burst)))
 	}
 }
diff --git a/internal/rootcoord/quota_center.go b/internal/rootcoord/quota_center.go
index 9dd91350c4..a4e2d45046 100644
--- a/internal/rootcoord/quota_center.go
+++ b/internal/rootcoord/quota_center.go
@@ -551,6 +551,7 @@ func (q *QuotaCenter) collectMetrics() error {
 
 // forceDenyWriting sets dml rates to 0 to reject all dml requests.
 func (q *QuotaCenter) forceDenyWriting(errorCode commonpb.ErrorCode, cluster bool, dbIDs, collectionIDs []int64, col2partitionIDs map[int64][]int64) error {
+	log := log.Ctx(context.TODO()).WithRateGroup("quotaCenter.forceDenyWriting", 1.0, 60.0)
 	if cluster {
 		clusterLimiters := q.rateLimiter.GetRootLimiters()
 		updateLimiter(clusterLimiters, GetEarliestLimiter(), internalpb.RateScope_Cluster, dml)
@@ -1282,7 +1283,8 @@ func (q *QuotaCenter) calculateRates() error {
 }
 
 func (q *QuotaCenter) resetAllCurrentRates() error {
-	q.rateLimiter = rlinternal.NewRateLimiterTree(initInfLimiter(internalpb.RateScope_Cluster, allOps))
+	clusterLimiter := newParamLimiterFunc(internalpb.RateScope_Cluster, allOps)()
+	q.rateLimiter = rlinternal.NewRateLimiterTree(clusterLimiter)
 	initLimiters := func(sourceCollections map[int64]map[int64][]int64) {
 		for dbID, collections := range sourceCollections {
 			for collectionID, partitionIDs := range collections {
@@ -1357,6 +1359,7 @@ func (q *QuotaCenter) getCollectionLimitProperties(collection int64) map[string]
 
 // checkDiskQuota checks if disk quota exceeded.
 func (q *QuotaCenter) checkDiskQuota(denyWritingDBs map[int64]struct{}) error {
+	log := log.Ctx(context.Background()).WithRateGroup("rootcoord.QuotaCenter", 1.0, 60.0)
 	q.diskMu.Lock()
 	defer q.diskMu.Unlock()
 	if !Params.QuotaConfig.DiskProtectionEnabled.GetAsBool() {
@@ -1370,6 +1373,7 @@ func (q *QuotaCenter) checkDiskQuota(denyWritingDBs map[int64]struct{}) error {
 	totalDiskQuota := Params.QuotaConfig.DiskQuota.GetAsFloat()
 	total := q.dataCoordMetrics.TotalBinlogSize
 	if float64(total) >= totalDiskQuota {
+		log.RatedWarn(10, "cluster disk quota exceeded", zap.Int64("disk usage", total), zap.Float64("disk quota", totalDiskQuota))
 		err := q.forceDenyWriting(commonpb.ErrorCode_DiskQuotaExhausted, true, nil, nil, nil)
 		if err != nil {
 			log.Warn("fail to force deny writing", zap.Error(err))
@@ -1431,6 +1435,7 @@ func (q *QuotaCenter) checkDiskQuota(denyWritingDBs map[int64]struct{}) error {
 }
 
 func (q *QuotaCenter) checkDBDiskQuota(dbSizeInfo map[int64]int64) []int64 {
+	log := log.Ctx(context.Background()).WithRateGroup("rootcoord.QuotaCenter", 1.0, 60.0)
 	dbIDs := make([]int64, 0)
 	checkDiskQuota := func(dbID, binlogSize int64, quota float64) {
 		if float64(binlogSize) >= quota {