diff --git a/apier/v1/stats_it_test.go b/apier/v1/stats_it_test.go
index 88838d257..6d395c106 100644
--- a/apier/v1/stats_it_test.go
+++ b/apier/v1/stats_it_test.go
@@ -70,7 +70,7 @@ var (
 		testV1STSInitDataDb,
 		testV1STSStartEngine,
 		testV1STSRpcConn,
-		testV1STSFromFolder,
+		testV1STSSetStats,
 		testV1STSGetStats,
 		testV1STSProcessEvent,
 		testV1STSGetStatsAfterRestart,
@@ -138,13 +138,54 @@ func testV1STSRpcConn(t *testing.T) {
 	}
 }
 
-func testV1STSFromFolder(t *testing.T) {
+func testV1STSSetStats(t *testing.T) {
+	// Create a StatProfile equivalent to "Stats1" from oldtutorial, in order to customize its TTL to be longer than the configured StoreInterval.
+	statConfig = &engine.StatQueueWithCache{
+		StatQueueProfile: &engine.StatQueueProfile{
+			Tenant:      "cgrates.org",
+			ID:          "Stats1",
+			FilterIDs:   []string{"*string:~*req.Account:1001;1002"},
+			QueueLength: 100,
+			TTL:         10 * time.Second,
+			Metrics: []*engine.MetricWithFilters{
+				{
+					MetricID: utils.MetaASR,
+				},
+				{
+					MetricID: utils.MetaACC,
+				},
+				{
+					MetricID: utils.MetaTCC,
+				},
+				{
+					MetricID: utils.MetaACD,
+				},
+				{
+					MetricID: utils.MetaTCD,
+				},
+				{
+					MetricID: "*sum:~*req.Usage",
+				},
+				{
+					MetricID: "*average:~*req.Usage",
+				},
+				{
+					MetricID:  utils.MetaPDD,
+					FilterIDs: []string{"*exists:~*req.PDD:"},
+				},
+			},
+			ThresholdIDs: []string{"*none"},
+			Blocker:      false,
+			Stored:       true,
+			Weight:       20,
+			MinItems:     2,
+		},
+	}
+
 	var reply string
-	attrs := &utils.AttrLoadTpFromFolder{FolderPath: path.Join(*utils.DataDir, "tariffplans", "oldtutorial")}
-	if err := stsV1Rpc.Call(utils.APIerSv1LoadTariffPlanFromFolder, attrs, &reply); err != nil {
+	if err := stsV1Rpc.Call(utils.APIerSv1SetStatQueueProfile, statConfig, &reply); err != nil {
 		t.Error(err)
 	}
-	time.Sleep(500 * time.Millisecond)
 }
 
 func testV1STSGetStats(t *testing.T) {
@@ -303,7 +344,10 @@ func testV1STSGetStatsAfterRestart(t *testing.T) {
 	if stsV1ConfDIR == "tutinternal" {
 		t.SkipNow()
 	}
+
+	// SIGKILL prevents graceful shutdown, so without waiting for StoreInterval, current stats won't be backed up.
 	time.Sleep(time.Second)
+
 	if _, err := engine.StopStartEngine(stsV1CfgPath, *utils.WaitRater); err != nil {
 		t.Fatal(err)
 	}
diff --git a/engine/libstats.go b/engine/libstats.go
index b8c8f3113..8544b9fa5 100644
--- a/engine/libstats.go
+++ b/engine/libstats.go
@@ -21,7 +21,6 @@ package engine
 import (
 	"fmt"
 	"sort"
-	"sync"
 	"time"
 
 	"github.com/cgrates/cgrates/config"
@@ -133,7 +132,6 @@ type SQItem struct {
 
 // StatQueue represents an individual stats instance
 type StatQueue struct {
-	lk        sync.RWMutex // protect the elements from within
 	Tenant    string
 	ID        string
 	SQItems   []SQItem
@@ -144,18 +142,6 @@ type StatQueue struct {
 	ttl       *time.Duration // timeToLeave, picked on each init
 }
 
-// RLock only to implement sync.RWMutex methods
-func (sq *StatQueue) RLock() { sq.lk.RLock() }
-
-// RUnlock only to implement sync.RWMutex methods
-func (sq *StatQueue) RUnlock() { sq.lk.RUnlock() }
-
-// Lock only to implement sync.RWMutex methods
-func (sq *StatQueue) Lock() { sq.lk.Lock() }
-
-// Unlock only to implement sync.RWMutex methods
-func (sq *StatQueue) Unlock() { sq.lk.Unlock() }
-
 // TenantID will compose the unique identifier for the StatQueue out of Tenant and ID
 func (sq *StatQueue) TenantID() string {
 	return utils.ConcatenatedKey(sq.Tenant, sq.ID)
@@ -163,7 +149,7 @@ func (sq *StatQueue) TenantID() string {
 
 // ProcessEvent processes a utils.CGREvent, returns true if processed
 func (sq *StatQueue) ProcessEvent(ev *utils.CGREvent, filterS *FilterS) (err error) {
-	if err = sq.remExpired(); err != nil {
+	if _, err = sq.remExpired(); err != nil {
 		return
 	}
 	if err = sq.remOnQueueLength(); err != nil {
@@ -188,7 +174,7 @@ func (sq *StatQueue) remEventWithID(evID string) (err error) {
 }
 
 // remExpired expires items in queue
-func (sq *StatQueue) remExpired() (err error) {
+func (sq *StatQueue) remExpired() (removed int, err error) {
 	var expIdx *int // index of last item to be expired
 	for i, item := range sq.SQItems {
 		if item.ExpiryTime == nil {
@@ -205,7 +191,8 @@ func (sq *StatQueue) remExpired() (err error) {
 	if expIdx == nil {
 		return
 	}
-	sq.SQItems = sq.SQItems[*expIdx+1:]
+	removed = *expIdx + 1
+	sq.SQItems = sq.SQItems[removed:]
 	return
 }
 
diff --git a/engine/libstats_test.go b/engine/libstats_test.go
index fba07b1dc..7e4add923 100644
--- a/engine/libstats_test.go
+++ b/engine/libstats_test.go
@@ -20,7 +20,6 @@ package engine
 import (
 	"fmt"
 	"reflect"
-	"sync"
 	"testing"
 	"time"
 
@@ -935,46 +934,3 @@ func TestLibStatsAsStatQueue(t *testing.T) {
 		t.Error(rcv)
 	}
 }
-
-func TestLibStatsLock(t *testing.T) {
-	si := []SQItem{{
-		EventID:    str,
-		ExpiryTime: &tm,
-	}}
-	msw := map[string]*StatWithCompress{"test": {
-		Stat:           fl,
-		CompressFactor: nm,
-	}}
-	st := StatASR{
-		FilterIDs: slc,
-		Answered:  fl,
-		Count:     n,
-		Events:    msw,
-		MinItems:  nm,
-	}
-	msm := map[string]StatMetric{"*asr": &st}
-
-	var rwm sync.RWMutex
-	sq := StatQueue{
-		lk:        rwm,
-		Tenant:    str,
-		ID:        str,
-		SQItems:   si,
-		SQMetrics: msm,
-		MinItems:  nm,
-	}
-
-	nExp := sq
-
-	sq.Lock()
-
-	if reflect.DeepEqual(sq, nExp) {
-		t.Error("didn't lock")
-	}
-
-	sq.Unlock()
-
-	if !reflect.DeepEqual(sq, nExp) {
-		t.Error("didn't lock")
-	}
-}
diff --git a/engine/stats.go b/engine/stats.go
index e36ec915e..8293c6564 100644
--- a/engine/stats.go
+++ b/engine/stats.go
@@ -223,6 +223,33 @@ func (sS *StatService) matchingStatQueuesForEvent(args *StatsArgsProcessEvent) (
 	return
 }
 
+func (sS *StatService) getStatQueue(tnt, id string) (sq *StatQueue, err error) {
+	if sq, err = sS.dm.GetStatQueue(tnt, id, true, true, utils.EmptyString); err != nil {
+		return
+	}
+
+	var removed int
+	if removed, err = sq.remExpired(); err != nil || removed == 0 {
+		return
+	}
+	sS.storeStatQueue(sq)
+	return
+}
+
+// storeStatQueue will store the sq if needed
+func (sS *StatService) storeStatQueue(sq *StatQueue) {
+	if sS.cgrcfg.StatSCfg().StoreInterval != 0 && sq.dirty != nil { // don't save
+		*sq.dirty = true // mark it to be saved
+		if sS.cgrcfg.StatSCfg().StoreInterval == -1 {
+			sS.StoreStatQueue(sq)
+		} else {
+			sS.ssqMux.Lock()
+			sS.storedStatQueues[sq.TenantID()] = true
+			sS.ssqMux.Unlock()
+		}
+	}
+}
+
 // Call implements birpc.ClientConnector interface for internal RPC
 // here for cases when passing StatsService as rpccclient.RpcClientConnection
 func (ss *StatService) Call(ctx *context.Context, serviceMethod string, args any, reply any) error {
@@ -260,17 +287,7 @@ func (sS *StatService) processEvent(args *StatsArgsProcessEvent) (statQueueIDs [
 					sq.TenantID(), args.TenantID(), err.Error()))
 			withErrors = true
 		}
-		if sS.cgrcfg.StatSCfg().StoreInterval != 0 && sq.dirty != nil { // don't save
-			if sS.cgrcfg.StatSCfg().StoreInterval == -1 {
-				*sq.dirty = true
-				sS.StoreStatQueue(sq)
-			} else {
-				*sq.dirty = true // mark it to be saved
-				sS.ssqMux.Lock()
-				sS.storedStatQueues[sq.TenantID()] = true
-				sS.ssqMux.Unlock()
-			}
-		}
+		sS.storeStatQueue(sq)
 		if len(sS.cgrcfg.StatSCfg().ThresholdSConns) != 0 {
 			var thIDs []string
 			if len(sq.sqPrfl.ThresholdIDs) != 0 {
@@ -358,11 +375,11 @@ func (sS *StatService) V1GetStatQueuesForEvent(args *StatsArgsProcessEvent, repl
 
 // V1GetStatQueue returns a StatQueue object
 func (sS *StatService) V1GetStatQueue(args *utils.TenantIDWithArgDispatcher, reply *StatQueue) (err error) {
-	if sq, err := sS.dm.GetStatQueue(args.Tenant, args.ID, true, true, ""); err != nil {
+	sq, err := sS.getStatQueue(args.Tenant, args.ID)
+	if err != nil {
 		return err
-	} else {
-		*reply = *sq
 	}
+	*reply = *sq
 	return
 }
 
@@ -371,19 +388,17 @@ func (sS *StatService) V1GetQueueStringMetrics(args *utils.TenantID, reply *map[
 	if missing := utils.MissingStructFields(args, []string{utils.Tenant, utils.ID}); len(missing) != 0 { //Params missing
 		return utils.NewErrMandatoryIeMissing(missing...)
 	}
-	sq, err := sS.dm.GetStatQueue(args.Tenant, args.ID, true, true, "")
+	sq, err := sS.getStatQueue(args.Tenant, args.ID)
 	if err != nil {
 		if err != utils.ErrNotFound {
 			err = utils.NewErrServerError(err)
 		}
 		return err
 	}
-	sq.RLock()
 	metrics := make(map[string]string, len(sq.SQMetrics))
 	for metricID, metric := range sq.SQMetrics {
 		metrics[metricID] = metric.GetStringValue("")
 	}
-	sq.RUnlock()
 	*reply = metrics
 	return
 }
@@ -393,19 +408,17 @@ func (sS *StatService) V1GetQueueFloatMetrics(args *utils.TenantID, reply *map[s
 	if missing := utils.MissingStructFields(args, []string{utils.Tenant, utils.ID}); len(missing) != 0 { //Params missing
 		return utils.NewErrMandatoryIeMissing(missing...)
 	}
-	sq, err := sS.dm.GetStatQueue(args.Tenant, args.ID, true, true, "")
+	sq, err := sS.getStatQueue(args.Tenant, args.ID)
 	if err != nil {
 		if err != utils.ErrNotFound {
 			err = utils.NewErrServerError(err)
 		}
 		return err
 	}
-	sq.RLock()
 	metrics := make(map[string]float64, len(sq.SQMetrics))
 	for metricID, metric := range sq.SQMetrics {
 		metrics[metricID] = metric.GetFloat64Value()
 	}
-	sq.RUnlock()
 	*reply = metrics
 	return
 }
diff --git a/general_tests/cdrs_it_test.go b/general_tests/cdrs_it_test.go
index d31198857..e8de3b390 100644
--- a/general_tests/cdrs_it_test.go
+++ b/general_tests/cdrs_it_test.go
@@ -187,7 +187,6 @@ func testV2CDRsProcessCDR(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetCdrs(t *testing.T) {
@@ -258,7 +257,6 @@ func testV2CDRsProcessCDR2(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetCdrs2(t *testing.T) {
@@ -331,7 +329,6 @@ func testV2CDRsProcessCDR3(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetCdrs3(t *testing.T) {
@@ -393,7 +390,6 @@ func testV2CDRsProcessCDR4(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetCdrs4(t *testing.T) {
@@ -479,6 +475,7 @@ func testV2CDRsSetStats(t *testing.T) {
 			ID:        "STS_PoccessCDR",
 			FilterIDs: []string{"*string:~*req.OriginID:testV2CDRsProcessCDR5"},
 			// QueueLength: 10,
+			TTL: -1,
 			Metrics: []*engine.MetricWithFilters{{
 				MetricID: "*sum:~*req.Usage",
 			}},
@@ -583,7 +580,6 @@ func testV2CDRsProcessCDR5(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetStats1(t *testing.T) {
@@ -650,14 +646,13 @@ func testV2CDRsProcessCDR6(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetStats2(t *testing.T) {
 	expectedIDs := []string{"STS_PoccessCDR"}
 	var metrics map[string]string
 	expectedMetrics := map[string]string{
-		utils.ConcatenatedKey(utils.MetaSum, utils.DynamicDataPrefix+utils.MetaReq+utils.NestingSep+utils.Usage): "60000000000",
+		utils.ConcatenatedKey(utils.MetaSum, utils.DynamicDataPrefix+utils.MetaReq+utils.NestingSep+utils.Usage): "120000000000",
 	}
 	if err := cdrsRpc.Call(utils.StatSv1GetQueueStringMetrics,
 		&utils.TenantIDWithArgDispatcher{
@@ -709,7 +704,6 @@ func testV2CDRsProcessCDR7(t *testing.T) {
 	} else if reply != utils.OK {
 		t.Error("Unexpected reply received: ", reply)
 	}
-	time.Sleep(time.Duration(150) * time.Millisecond) // Give time for CDR to be rated
 }
 
 func testV2CDRsGetCdrs7(t *testing.T) {