diff --git a/cache2go/response_cache.go b/cache2go/response_cache.go
index 4ac57e3f7..c27fdecbf 100644
--- a/cache2go/response_cache.go
+++ b/cache2go/response_cache.go
@@ -18,7 +18,7 @@ type CacheItem struct {
 type ResponseCache struct {
 	ttl       time.Duration
 	cache     map[string]*CacheItem
-	semaphore map[string]chan bool
+	semaphore map[string]chan bool // used for waiting till the first goroutine processes the response
 	mu        sync.RWMutex
 }
 
diff --git a/engine/responder.go b/engine/responder.go
index 76b9a9b9d..e769a0058 100644
--- a/engine/responder.go
+++ b/engine/responder.go
@@ -24,6 +24,7 @@ import (
 	"net/rpc"
 	"reflect"
 	"runtime"
+	"strconv"
 	"strings"
 	"time"
 
@@ -149,7 +150,8 @@ func (rs *Responder) Debit(arg *CallDescriptor, reply *CallCost) (err error) {
 }
 
 func (rs *Responder) MaxDebit(arg *CallDescriptor, reply *CallCost) (err error) {
-	if item, err := rs.getCache().Get(utils.MAX_DEBIT_CACHE_PREFIX + arg.CgrId); err == nil && item != nil {
+	cacheKey := "MaxDebit" + arg.CgrId + strconv.FormatFloat(arg.LoopIndex, 'f', -1, 64)
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
 		*reply = *(item.Value.(*CallCost))
 		return item.Err
 	}
@@ -167,10 +169,12 @@ func (rs *Responder) MaxDebit(arg *CallDescriptor, reply *CallCost) (err error)
 			Subject:     arg.Subject,
 			Context:     utils.ALIAS_CONTEXT_RATING,
 		}, arg, utils.EXTRA_FIELDS); err != nil && err != utils.ErrNotFound {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	// replace user profile fields
 	if err := LoadUserProfile(arg, utils.EXTRA_FIELDS); err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	if rs.Bal != nil {
@@ -179,23 +183,19 @@ func (rs *Responder) MaxDebit(arg *CallDescriptor, reply *CallCost) (err error)
 	} else {
 		r, e := arg.MaxDebit()
 		if e != nil {
-			rs.getCache().Cache(utils.MAX_DEBIT_CACHE_PREFIX+arg.CgrId, &cache2go.CacheItem{
-				Err: e,
-			})
+			rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: e})
 			return e
 		} else if r != nil {
 			*reply = *r
 		}
 	}
-	rs.getCache().Cache(utils.MAX_DEBIT_CACHE_PREFIX+arg.CgrId, &cache2go.CacheItem{
-		Value: reply,
-		Err:   err,
-	})
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: reply, Err: err})
 	return
 }
 
 func (rs *Responder) RefundIncrements(arg *CallDescriptor, reply *float64) (err error) {
-	if item, err := rs.getCache().Get(utils.REFUND_INCR_CACHE_PREFIX + arg.CgrId); err == nil && item != nil {
+	cacheKey := "RefundIncrements" + arg.CgrId
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
 		*reply = *(item.Value.(*float64))
 		return item.Err
 	}
@@ -213,10 +213,12 @@ func (rs *Responder) RefundIncrements(arg *CallDescriptor, reply *float64) (err
 			Subject:     arg.Subject,
 			Context:     utils.ALIAS_CONTEXT_RATING,
 		}, arg, utils.EXTRA_FIELDS); err != nil && err != utils.ErrNotFound {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	// replace user profile fields
 	if err := LoadUserProfile(arg, utils.EXTRA_FIELDS); err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	if rs.Bal != nil {
@@ -227,10 +229,7 @@ func (rs *Responder) RefundIncrements(arg *CallDescriptor, reply *float64) (err
 		}, 0, arg.GetAccountKey())
 		*reply, err = r.(float64), e
 	}
-	rs.getCache().Cache(utils.REFUND_INCR_CACHE_PREFIX+arg.CgrId, &cache2go.CacheItem{
-		Value: reply,
-		Err:   err,
-	})
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: reply, Err: err})
 	return
 }
 
@@ -266,8 +265,15 @@ func (rs *Responder) GetMaxSessionTime(arg *CallDescriptor, reply *float64) (err
 
 // Returns MaxSessionTime for an event received in SessionManager, considering DerivedCharging for it
 func (rs *Responder) GetDerivedMaxSessionTime(ev *StoredCdr, reply *float64) error {
+	cacheKey := "GetDerivedMaxSessionTime" + ev.CgrId
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
+		*reply = *(item.Value.(*float64))
+		return item.Err
+	}
 	if rs.Bal != nil {
-		return errors.New("unsupported method on the balancer")
+		err := errors.New("unsupported method on the balancer")
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
+		return err
 	}
 	if ev.Subject == "" {
 		ev.Subject = ev.Account
@@ -283,10 +289,12 @@ func (rs *Responder) GetDerivedMaxSessionTime(ev *StoredCdr, reply *float64) err
 			Subject:     ev.Subject,
 			Context:     utils.ALIAS_CONTEXT_RATING,
 		}, ev, utils.EXTRA_FIELDS); err != nil && err != utils.ErrNotFound {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	// replace user profile fields
 	if err := LoadUserProfile(ev, utils.EXTRA_FIELDS); err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	maxCallDuration := -1.0
@@ -294,6 +302,7 @@ func (rs *Responder) GetDerivedMaxSessionTime(ev *StoredCdr, reply *float64) err
 		Account: ev.GetAccount(utils.META_DEFAULT), Subject: ev.GetSubject(utils.META_DEFAULT)}
 	dcs := &utils.DerivedChargers{}
 	if err := rs.GetDerivedChargers(attrsDC, dcs); err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	dcs, _ = dcs.AppendDefaultRun()
@@ -314,10 +323,12 @@ func (rs *Responder) GetDerivedMaxSessionTime(ev *StoredCdr, reply *float64) err
 		}
 		startTime, err := ev.GetSetupTime(utils.META_DEFAULT, rs.Timezone)
 		if err != nil {
+			rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 			return err
 		}
 		usage, err := ev.GetDuration(utils.META_DEFAULT)
 		if err != nil {
+			rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 			return err
 		}
 		if usage == 0 {
@@ -337,6 +348,7 @@ func (rs *Responder) GetDerivedMaxSessionTime(ev *StoredCdr, reply *float64) err
 		err = rs.GetMaxSessionTime(cd, &remainingDuration)
 		if err != nil {
 			*reply = 0
+			rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 			return err
 		}
 		if utils.IsSliceMember([]string{utils.META_POSTPAID, utils.POSTPAID}, ev.GetReqType(dc.ReqTypeField)) { // Only consider prepaid and pseudoprepaid for MaxSessionTime
@@ -349,14 +361,22 @@ func (rs *Responder) GetDerivedMaxSessionTime(ev *StoredCdr, reply *float64) err
 			maxCallDuration = remainingDuration
 		}
 	}
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: maxCallDuration})
 	*reply = maxCallDuration
 	return nil
 }
 
 // Used by SM to get all the prepaid CallDescriptors attached to a session
 func (rs *Responder) GetSessionRuns(ev *StoredCdr, sRuns *[]*SessionRun) error {
+	cacheKey := "GetSessionRuns" + ev.CgrId
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
+		*sRuns = *(item.Value.(*[]*SessionRun))
+		return item.Err
+	}
 	if rs.Bal != nil {
-		return errors.New("Unsupported method on the balancer")
+		err := errors.New("Unsupported method on the balancer")
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
+		return err
 	}
 	if ev.Subject == "" {
 		ev.Subject = ev.Account
@@ -372,19 +392,19 @@ func (rs *Responder) GetSessionRuns(ev *StoredCdr, sRuns *[]*SessionRun) error {
 			Subject:     ev.Subject,
 			Context:     utils.ALIAS_CONTEXT_RATING,
 		}, ev, utils.EXTRA_FIELDS); err != nil && err != utils.ErrNotFound {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	// replace user profile fields
 	if err := LoadUserProfile(ev, utils.EXTRA_FIELDS); err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	attrsDC := &utils.AttrDerivedChargers{Tenant: ev.GetTenant(utils.META_DEFAULT), Category: ev.GetCategory(utils.META_DEFAULT), Direction: ev.GetDirection(utils.META_DEFAULT),
 		Account: ev.GetAccount(utils.META_DEFAULT), Subject: ev.GetSubject(utils.META_DEFAULT)}
 	dcs := &utils.DerivedChargers{}
 	if err := rs.GetDerivedChargers(attrsDC, dcs); err != nil {
-		rs.getCache().Cache(utils.GET_SESS_RUNS_CACHE_PREFIX+ev.CgrId, &cache2go.CacheItem{
-			Err: err,
-		})
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	dcs, _ = dcs.AppendDefaultRun()
@@ -395,10 +415,9 @@ func (rs *Responder) GetSessionRuns(ev *StoredCdr, sRuns *[]*SessionRun) error {
 		}
 		startTime, err := ev.GetAnswerTime(dc.AnswerTimeField, rs.Timezone)
 		if err != nil {
-			rs.getCache().Cache(utils.GET_SESS_RUNS_CACHE_PREFIX+ev.CgrId, &cache2go.CacheItem{
-				Err: err,
-			})
-			return errors.New("Error parsing answer event start time")
+			err := errors.New("Error parsing answer event start time")
+			rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
+			return err
 		}
 		cd := &CallDescriptor{
 			Direction:   ev.GetDirection(dc.DirectionField),
@@ -411,9 +430,7 @@ func (rs *Responder) GetSessionRuns(ev *StoredCdr, sRuns *[]*SessionRun) error {
 		sesRuns = append(sesRuns, &SessionRun{DerivedCharger: dc, CallDescriptor: cd})
 	}
 	*sRuns = sesRuns
-	rs.getCache().Cache(utils.GET_SESS_RUNS_CACHE_PREFIX+ev.CgrId, &cache2go.CacheItem{
-		Value: sRuns,
-	})
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: sRuns})
 	return nil
 }
 
@@ -430,42 +447,51 @@ func (rs *Responder) GetDerivedChargers(attrs *utils.AttrDerivedChargers, dcs *u
 }
 
 func (rs *Responder) ProcessCdr(cdr *StoredCdr, reply *string) error {
-	if rs.CdrSrv == nil {
-		return errors.New("CDR_SERVER_NOT_RUNNING")
+	cacheKey := "ProcessCdr" + cdr.CgrId
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
+		*reply = *(item.Value.(*string))
+		return item.Err
 	}
-	if err := rs.CdrSrv.ProcessCdr(cdr); err != nil {
+	if rs.CdrSrv == nil {
+		err := errors.New("CDR_SERVER_NOT_RUNNING")
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
+	if err := rs.CdrSrv.ProcessCdr(cdr); err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
+		return err
+	}
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: utils.OK})
 	*reply = utils.OK
 	return nil
 }
 
 func (rs *Responder) LogCallCost(ccl *CallCostLog, reply *string) error {
-	if item, err := rs.getCache().Get(utils.LOG_CALL_COST_CACHE_PREFIX + ccl.CgrId); err == nil && item != nil {
+	cacheKey := "LogCallCost" + ccl.CgrId
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
 		*reply = item.Value.(string)
 		return item.Err
 	}
 	if rs.CdrSrv == nil {
 		err := errors.New("CDR_SERVER_NOT_RUNNING")
-		rs.getCache().Cache(utils.LOG_CALL_COST_CACHE_PREFIX+ccl.CgrId, &cache2go.CacheItem{
-			Err: err,
-		})
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	if err := rs.CdrSrv.LogCallCost(ccl); err != nil {
-		rs.getCache().Cache(utils.LOG_CALL_COST_CACHE_PREFIX+ccl.CgrId, &cache2go.CacheItem{
-			Err: err,
-		})
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	*reply = utils.OK
-	rs.getCache().Cache(utils.LOG_CALL_COST_CACHE_PREFIX+ccl.CgrId, &cache2go.CacheItem{
-		Value: utils.OK,
-	})
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: utils.OK})
 	return nil
 }
 
 func (rs *Responder) GetLCR(attrs *AttrGetLcr, reply *LCRCost) error {
+	cacheKey := "GetLCR" + attrs.CgrId
+	if item, err := rs.getCache().Get(cacheKey); err == nil && item != nil {
+		*reply = *(item.Value.(*LCRCost))
+		return item.Err
+	}
 	if attrs.CallDescriptor.Subject == "" {
 		attrs.CallDescriptor.Subject = attrs.CallDescriptor.Account
 	}
@@ -481,6 +507,7 @@ func (rs *Responder) GetLCR(attrs *AttrGetLcr, reply *LCRCost) error {
 			Subject:     cd.Subject,
 			Context:     utils.ALIAS_CONTEXT_RATING,
 		}, cd, utils.EXTRA_FIELDS); err != nil && err != utils.ErrNotFound {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	// replace user profile fields
@@ -489,6 +516,7 @@ func (rs *Responder) GetLCR(attrs *AttrGetLcr, reply *LCRCost) error {
 	}
 	lcrCost, err := attrs.CallDescriptor.GetLCR(rs.Stats, attrs.Paginator)
 	if err != nil {
+		rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Err: err})
 		return err
 	}
 	if lcrCost.Entry.Strategy == LCR_STRATEGY_LOAD {
@@ -496,6 +524,7 @@ func (rs *Responder) GetLCR(attrs *AttrGetLcr, reply *LCRCost) error {
 			suppl.Cost = -1 // In case of load distribution we don't calculate costs
 		}
 	}
+	rs.getCache().Cache(cacheKey, &cache2go.CacheItem{Value: lcrCost})
 	*reply = *lcrCost
 	return nil
 }
diff --git a/sessionmanager/fsevent.go b/sessionmanager/fsevent.go
index 2b46a8129..905239d70 100644
--- a/sessionmanager/fsevent.go
+++ b/sessionmanager/fsevent.go
@@ -373,6 +373,7 @@ func (fsev FSEvent) ComputeLcr() bool {
 // Converts into CallDescriptor due to responder interface needs
 func (fsev FSEvent) AsCallDescriptor() (*engine.CallDescriptor, error) {
 	lcrReq := &engine.LcrRequest{
+
 		Direction:   fsev.GetDirection(utils.META_DEFAULT),
 		Tenant:      fsev.GetTenant(utils.META_DEFAULT),
 		Category:    fsev.GetCategory(utils.META_DEFAULT),
diff --git a/sessionmanager/fssessionmanager.go b/sessionmanager/fssessionmanager.go
index 969dacf4e..11af53e00 100644
--- a/sessionmanager/fssessionmanager.go
+++ b/sessionmanager/fssessionmanager.go
@@ -100,6 +100,7 @@ func (sm *FSSessionManager) setCgrLcr(ev engine.Event, connId string) error {
 		return err
 	}
 	cd := &engine.CallDescriptor{
+		CgrId:       ev.GetCgrId(sm.Timezone()),
 		Direction:   ev.GetDirection(utils.META_DEFAULT),
 		Tenant:      ev.GetTenant(utils.META_DEFAULT),
 		Category:    ev.GetCategory(utils.META_DEFAULT),
@@ -148,6 +149,7 @@ func (sm *FSSessionManager) onChannelPark(ev engine.Event, connId string) {
 	// ComputeLcr
 	if ev.ComputeLcr() {
 		cd, err := fsev.AsCallDescriptor()
+		cd.CgrId = fsev.GetCgrId(sm.Timezone())
 		if err != nil {
 			utils.Logger.Info(fmt.Sprintf("<SM-FreeSWITCH> LCR_PREPROCESS_ERROR: %s", err.Error()))
 			sm.unparkCall(ev.GetUUID(), connId, ev.GetCallDestNr(utils.META_DEFAULT), SYSTEM_ERROR)
diff --git a/sessionmanager/kamailiosm.go b/sessionmanager/kamailiosm.go
index e195bfe8c..26754a200 100644
--- a/sessionmanager/kamailiosm.go
+++ b/sessionmanager/kamailiosm.go
@@ -103,6 +103,7 @@ func (self *KamailioSessionManager) onCgrLcrReq(evData []byte, connId string) {
 
 func (self *KamailioSessionManager) getSuppliers(kev KamEvent) (string, error) {
 	cd, err := kev.AsCallDescriptor()
+	cd.CgrId = kev.GetCgrId(self.timezone)
 	if err != nil {
 		utils.Logger.Info(fmt.Sprintf("<SM-Kamailio> LCR_PREPROCESS_ERROR error: %s", err.Error()))
 		return "", errors.New("LCR_PREPROCESS_ERROR")
diff --git a/sessionmanager/session.go b/sessionmanager/session.go
index 82347807c..31ba88eeb 100644
--- a/sessionmanager/session.go
+++ b/sessionmanager/session.go
@@ -70,7 +70,7 @@ func NewSession(ev engine.Event, connId string, sm SessionManager) *Session {
 // the debit loop method (to be stoped by sending somenthing on stopDebit channel)
 func (s *Session) debitLoop(runIdx int) {
 	nextCd := s.sessionRuns[runIdx].CallDescriptor
-	nextCd.CgrId = s.eventStart.GetCgrId("")
+	nextCd.CgrId = s.eventStart.GetCgrId(s.sessionManager.Timezone())
 	index := 0.0
 	debitPeriod := s.sessionManager.DebitInterval()
 	for {
@@ -195,6 +195,7 @@ func (s *Session) Refund(lastCC *engine.CallCost, hangupTime time.Time) error {
 	// utils.Logger.Info(fmt.Sprintf("Refund duration: %v", initialRefundDuration-refundDuration))
 	if len(refundIncrements) > 0 {
 		cd := &engine.CallDescriptor{
+			CgrId:       s.eventStart.GetCgrId(s.sessionManager.Timezone()),
 			Direction:   lastCC.Direction,
 			Tenant:      lastCC.Tenant,
 			Category:    lastCC.Category,
diff --git a/sessionmanager/smgeneric.go b/sessionmanager/smgeneric.go
index 6546991a3..7d019dcef 100644
--- a/sessionmanager/smgeneric.go
+++ b/sessionmanager/smgeneric.go
@@ -145,6 +145,7 @@ func (self *SMGeneric) GetMaxUsage(gev SMGenericEvent, clnt *rpc2.Client) (time.
 func (self *SMGeneric) GetLcrSuppliers(gev SMGenericEvent, clnt *rpc2.Client) ([]string, error) {
 	gev[utils.EVENT_NAME] = utils.CGR_LCR_REQUEST
 	cd, err := gev.AsLcrRequest().AsCallDescriptor(self.timezone)
+	cd.CgrId = gev.GetCgrId(self.timezone)
 	if err != nil {
 		return nil, err
 	}
diff --git a/utils/consts.go b/utils/consts.go
index 7024a73e5..8293abda4 100644
--- a/utils/consts.go
+++ b/utils/consts.go
@@ -231,10 +231,6 @@ const (
 	CGR_SUPPLIERS                = "cgr_suppliers"
 	KAM_FLATSTORE                = "kamailio_flatstore"
 	OSIPS_FLATSTORE              = "opensips_flatstore"
-	MAX_DEBIT_CACHE_PREFIX       = "MAX_DEBIT_"
-	REFUND_INCR_CACHE_PREFIX     = "REFUND_INCR_"
-	GET_SESS_RUNS_CACHE_PREFIX   = "GET_SESS_RUNS_"
-	LOG_CALL_COST_CACHE_PREFIX   = "LOG_CALL_COSTS_"
 	ALIAS_CONTEXT_RATING         = "*rating"
 	NOT_AVAILABLE                = "N/A"
 	CALL                         = "call"