diff --git a/Makefile b/Makefile
index 5fd444831..1c6342b76 100644
--- a/Makefile
+++ b/Makefile
@@ -90,6 +90,9 @@ check-all: fmt vet lint errcheck golangci-lint
 test:
 	GO111MODULE=on go test -mod=vendor ./lib/... ./app/...
 
+test-race:
+	GO111MODULE=on go test -mod=vendor -race ./lib/... ./app/...
+
 test-pure:
 	GO111MODULE=on CGO_ENABLED=0 go test -mod=vendor ./lib/... ./app/...
 
diff --git a/app/victoria-metrics/Makefile b/app/victoria-metrics/Makefile
index f20a17838..f6674db4d 100644
--- a/app/victoria-metrics/Makefile
+++ b/app/victoria-metrics/Makefile
@@ -3,6 +3,9 @@
 victoria-metrics:
 	APP_NAME=victoria-metrics $(MAKE) app-local
 
+victoria-metrics-race:
+	APP_NAME=victoria-metrics RACE=-race $(MAKE) app-local
+
 victoria-metrics-prod:
 	APP_NAME=victoria-metrics $(MAKE) app-via-docker
 
diff --git a/app/vmagent/Makefile b/app/vmagent/Makefile
index e2fbfc2b3..e18755f64 100644
--- a/app/vmagent/Makefile
+++ b/app/vmagent/Makefile
@@ -3,6 +3,9 @@
 vmagent:
 	APP_NAME=vmagent $(MAKE) app-local
 
+vmagent-race:
+	APP_NAME=vmagent RACE=-race $(MAKE) app-local
+
 vmagent-prod:
 	APP_NAME=vmagent $(MAKE) app-via-docker
 
diff --git a/app/vmbackup/Makefile b/app/vmbackup/Makefile
index 842049767..609e57c97 100644
--- a/app/vmbackup/Makefile
+++ b/app/vmbackup/Makefile
@@ -3,6 +3,9 @@
 vmbackup:
 	APP_NAME=vmbackup $(MAKE) app-local
 
+vmbackup-race:
+	APP_NAME=vmbackup RACE=-race $(MAKE) app-local
+
 vmbackup-prod:
 	APP_NAME=vmbackup $(MAKE) app-via-docker
 
diff --git a/app/vmrestore/Makefile b/app/vmrestore/Makefile
index 305bee9f2..314a9a938 100644
--- a/app/vmrestore/Makefile
+++ b/app/vmrestore/Makefile
@@ -3,6 +3,9 @@
 vmrestore:
 	APP_NAME=vmrestore $(MAKE) app-local
 
+vmrestore-race:
+	APP_NAME=vmrestore RACE=-race $(MAKE) app-local
+
 vmrestore-prod:
 	APP_NAME=vmrestore $(MAKE) app-via-docker
 
diff --git a/app/vmselect/promql/arch.go b/app/vmselect/promql/arch.go
deleted file mode 100644
index 2e21b8674..000000000
--- a/app/vmselect/promql/arch.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package promql
-
-import "unsafe"
-
-const maxByteSliceLen = 1<<(31+9*(unsafe.Sizeof(int(0))/8)) - 1
diff --git a/app/vmselect/promql/timeseries.go b/app/vmselect/promql/timeseries.go
index a48089b74..c000f5430 100644
--- a/app/vmselect/promql/timeseries.go
+++ b/app/vmselect/promql/timeseries.go
@@ -2,6 +2,7 @@ package promql
 
 import (
 	"fmt"
+	"reflect"
 	"sort"
 	"strconv"
 	"sync"
@@ -168,7 +169,7 @@ func (ts *timeseries) marshalFastNoTimestamps(dst []byte) []byte {
 	// during marshalFastTimestamps.
 	var valuesBuf []byte
 	if len(ts.Values) > 0 {
-		valuesBuf = (*[maxByteSliceLen]byte)(unsafe.Pointer(&ts.Values[0]))[:len(ts.Values)*8]
+		valuesBuf = float64ToByteSlice(ts.Values)
 	}
 	dst = append(dst, valuesBuf...)
 	return dst
@@ -178,7 +179,7 @@ func marshalFastTimestamps(dst []byte, timestamps []int64) []byte {
 	dst = encoding.MarshalUint32(dst, uint32(len(timestamps)))
 	var timestampsBuf []byte
 	if len(timestamps) > 0 {
-		timestampsBuf = (*[maxByteSliceLen]byte)(unsafe.Pointer(&timestamps[0]))[:len(timestamps)*8]
+		timestampsBuf = int64ToByteSlice(timestamps)
 	}
 	dst = append(dst, timestampsBuf...)
 	return dst
@@ -199,8 +200,7 @@ func unmarshalFastTimestamps(src []byte) ([]byte, []int64, error) {
 	if len(src) < bufSize {
 		return src, nil, fmt.Errorf("cannot unmarshal timestamps; got %d bytes; want at least %d bytes", len(src), bufSize)
 	}
-	timestamps := (*[maxByteSliceLen / 8]int64)(unsafe.Pointer(&src[0]))[:timestampsCount]
-	timestamps = timestamps[:len(timestamps):len(timestamps)]
+	timestamps := byteSliceToInt64(src[:bufSize])
 	src = src[bufSize:]
 
 	return src, timestamps, nil
@@ -229,12 +229,43 @@ func (ts *timeseries) unmarshalFastNoTimestamps(src []byte) ([]byte, error) {
 	if len(src) < bufSize {
 		return src, fmt.Errorf("cannot unmarshal values; got %d bytes; want at least %d bytes", len(src), bufSize)
 	}
-	values := (*[maxByteSliceLen / 8]float64)(unsafe.Pointer(&src[0]))[:valuesCount]
-	ts.Values = values[:len(values):len(values)]
+	ts.Values = byteSliceToFloat64(src[:bufSize])
 
 	return src[bufSize:], nil
 }
 
+func float64ToByteSlice(a []float64) (b []byte) {
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = uintptr(unsafe.Pointer(&a[0]))
+	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
+func int64ToByteSlice(a []int64) (b []byte) {
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = uintptr(unsafe.Pointer(&a[0]))
+	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
+func byteSliceToInt64(b []byte) (a []int64) {
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&a))
+	sh.Data = uintptr(unsafe.Pointer(&b[0]))
+	sh.Len = len(b) / int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
+func byteSliceToFloat64(b []byte) (a []float64) {
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&a))
+	sh.Data = uintptr(unsafe.Pointer(&b[0]))
+	sh.Len = len(b) / int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
 // unmarshalMetricNameFast unmarshals mn from src, so mn members
 // hold references to src.
 //
diff --git a/lib/fastnum/fastnum.go b/lib/fastnum/fastnum.go
index f4b191a87..524098bb2 100644
--- a/lib/fastnum/fastnum.go
+++ b/lib/fastnum/fastnum.go
@@ -2,6 +2,7 @@ package fastnum
 
 import (
 	"bytes"
+	"reflect"
 	"unsafe"
 )
 
@@ -84,7 +85,7 @@ func isInt64Data(a, data []int64) bool {
 	if len(data) != 8*1024 {
 		panic("len(data) must equal to 8*1024")
 	}
-	b := (*[64 * 1024]byte)(unsafe.Pointer(&data[0]))
+	b := int64ToByteSlice(data)
 	for len(a) > 0 {
 		n := len(data)
 		if n > len(a) {
@@ -92,9 +93,8 @@ func isInt64Data(a, data []int64) bool {
 		}
 		x := a[:n]
 		a = a[n:]
-		xb := (*[64 * 1024]byte)(unsafe.Pointer(&x[0]))
-		xbLen := len(x) * 8
-		if !bytes.Equal(xb[:xbLen], b[:xbLen]) {
+		xb := int64ToByteSlice(x)
+		if !bytes.Equal(xb, b[:len(xb)]) {
 			return false
 		}
 	}
@@ -108,7 +108,7 @@ func isFloat64Data(a, data []float64) bool {
 	if len(data) != 8*1024 {
 		panic("len(data) must equal to 8*1024")
 	}
-	b := (*[64 * 1024]byte)(unsafe.Pointer(&data[0]))
+	b := float64ToByteSlice(data)
 	for len(a) > 0 {
 		n := len(data)
 		if n > len(a) {
@@ -116,15 +116,30 @@ func isFloat64Data(a, data []float64) bool {
 		}
 		x := a[:n]
 		a = a[n:]
-		xb := (*[64 * 1024]byte)(unsafe.Pointer(&x[0]))
-		xbLen := len(x) * 8
-		if !bytes.Equal(xb[:xbLen], b[:xbLen]) {
+		xb := float64ToByteSlice(x)
+		if !bytes.Equal(xb, b[:len(xb)]) {
 			return false
 		}
 	}
 	return true
 }
 
+func int64ToByteSlice(a []int64) (b []byte) {
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = uintptr(unsafe.Pointer(&a[0]))
+	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
+func float64ToByteSlice(a []float64) (b []byte) {
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = uintptr(unsafe.Pointer(&a[0]))
+	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
 var (
 	int64Zeros [8 * 1024]int64
 	int64Ones  = func() (a [8 * 1024]int64) {