diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index efe4f7cf92..fbf97dfebf 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -403,8 +403,8 @@ quotaAndLimits:
   dql:
     enabled: false
     searchRate:
-      max: # vps, default no limit
-      min: # vps, default 0
+      max: # vps (vectors per second), default no limit
+      min: # vps (vectors per second), default 0
     queryRate:
       max: # qps, default no limit
       min: # qps, default 0
diff --git a/internal/proxy/multi_rate_limiter.go b/internal/proxy/multi_rate_limiter.go
index 49986c258d..ee0e39090b 100644
--- a/internal/proxy/multi_rate_limiter.go
+++ b/internal/proxy/multi_rate_limiter.go
@@ -124,7 +124,7 @@ func (rl *rateLimiter) registerLimiters() {
 		}
 		log.Info("RateLimiter register for rateType",
 			zap.String("rateType", internalpb.RateType_name[rt]),
-			zap.Float64("rate", r))
+			zap.String("rate", ratelimitutil.Limit(r).String()))
 		limit := ratelimitutil.Limit(r)
 		if limit < 0 {
 			limit = ratelimitutil.Inf
diff --git a/internal/util/paramtable/quota_param.go b/internal/util/paramtable/quota_param.go
index a001867a04..948513864e 100644
--- a/internal/util/paramtable/quota_param.go
+++ b/internal/util/paramtable/quota_param.go
@@ -35,6 +35,9 @@ const (
 	defaultLowWaterLevel = float64(0.8)
 	// defaultHighWaterLevel is the default memory low water level.
 	defaultHighWaterLevel = float64(0.9)
+
+	// secondsPerMinute is used to convert minutes to seconds.
+	secondsPerMinute = 60.0
 )
 
 // quotaConfig is configuration for quota and limitations.
@@ -164,6 +167,7 @@ func (p *quotaConfig) initDDLCollectionRate() {
 		return
 	}
 	p.DDLCollectionRate = p.Base.ParseFloatWithDefault("quotaAndLimits.ddl.collectionRate", defaultMax)
+	p.DDLCollectionRate /= secondsPerMinute
 	// [0 ~ Inf)
 	if p.DDLCollectionRate < 0 {
 		p.DDLCollectionRate = defaultMax
@@ -176,6 +180,7 @@ func (p *quotaConfig) initDDLPartitionRate() {
 		return
 	}
 	p.DDLPartitionRate = p.Base.ParseFloatWithDefault("quotaAndLimits.ddl.partitionRate", defaultMax)
+	p.DDLPartitionRate /= secondsPerMinute
 	// [0 ~ Inf)
 	if p.DDLPartitionRate < 0 {
 		p.DDLPartitionRate = defaultMax
@@ -188,6 +193,7 @@ func (p *quotaConfig) initDDLIndexRate() {
 		return
 	}
 	p.DDLIndexRate = p.Base.ParseFloatWithDefault("quotaAndLimits.ddl.indexRate", defaultMax)
+	p.DDLIndexRate /= secondsPerMinute
 	// [0 ~ Inf)
 	if p.DDLIndexRate < 0 {
 		p.DDLIndexRate = defaultMax
@@ -200,6 +206,7 @@ func (p *quotaConfig) initDDLFlushRate() {
 		return
 	}
 	p.DDLFlushRate = p.Base.ParseFloatWithDefault("quotaAndLimits.ddl.flushRate", defaultMax)
+	p.DDLFlushRate /= secondsPerMinute
 	// [0 ~ Inf)
 	if p.DDLFlushRate < 0 {
 		p.DDLFlushRate = defaultMax
@@ -212,6 +219,7 @@ func (p *quotaConfig) initDDLCompactionRate() {
 		return
 	}
 	p.DDLCompactionRate = p.Base.ParseFloatWithDefault("quotaAndLimits.ddl.compactionRate", defaultMax)
+	p.DDLCompactionRate /= secondsPerMinute
 	// [0 ~ Inf)
 	if p.DDLCompactionRate < 0 {
 		p.DDLCompactionRate = defaultMax
diff --git a/internal/util/ratelimitutil/limiter.go b/internal/util/ratelimitutil/limiter.go
index e09c338bc0..f61cfcc7ab 100644
--- a/internal/util/ratelimitutil/limiter.go
+++ b/internal/util/ratelimitutil/limiter.go
@@ -17,6 +17,7 @@
 package ratelimitutil
 
 import (
+	"fmt"
 	"math"
 	"sync"
 	"time"
@@ -132,6 +133,14 @@ func (lim *Limiter) advance(now time.Time) (newNow time.Time, newLast time.Time,
 	return now, last, tokens
 }
 
+// String returns string of Limit.
+func (limit Limit) String() string {
+	if limit == Inf {
+		return "+inf"
+	}
+	return fmt.Sprintf("%.4f", limit)
+}
+
 // tokensFromDuration is a unit conversion function from a time duration to the number of tokens
 // which could be accumulated during that duration at a rate of limit tokens per second.
 func (limit Limit) tokensFromDuration(d time.Duration) float64 {