diff --git a/LICENSE b/LICENSE
index b0d2a9fb5..84f8ad8b8 100644
--- a/LICENSE
+++ b/LICENSE
@@ -175,7 +175,7 @@
 
    END OF TERMS AND CONDITIONS
 
-   Copyright 2019-2020 VictoriaMetrics, Inc.
+   Copyright 2019-2021 VictoriaMetrics, Inc.
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/Makefile b/Makefile
index cd02309f8..9d7ffaad2 100644
--- a/Makefile
+++ b/Makefile
@@ -64,28 +64,54 @@ release: \
 	release-victoria-metrics \
 	release-vmutils
 
-release-victoria-metrics: victoria-metrics-prod
-	cd bin && tar czf victoria-metrics-$(PKG_TAG).tar.gz victoria-metrics-prod && \
-		sha256sum victoria-metrics-$(PKG_TAG).tar.gz > victoria-metrics-$(PKG_TAG)_checksums.txt
+release-victoria-metrics: \
+	release-victoria-metrics-amd64 \
+	release-victoria-metrics-arm64
+
+release-victoria-metrics-amd64:
+	GOARCH=amd64 $(MAKE) release-victoria-metrics-generic
+
+release-victoria-metrics-arm64:
+	GOARCH=arm64 $(MAKE) release-victoria-metrics-generic
+
+release-victoria-metrics-generic: victoria-metrics-$(GOARCH)-prod
+	cd bin && \
+		tar --transform="flags=r;s|-$(GOARCH)||" -czf victoria-metrics-$(GOARCH)-$(PKG_TAG).tar.gz \
+			victoria-metrics-$(GOARCH)-prod \
+		&& sha256sum victoria-metrics-$(GOARCH)-$(PKG_TAG).tar.gz \
+			victoria-metrics-$(GOARCH)-prod \
+			| sed s/-$(GOARCH)// > victoria-metrics-$(GOARCH)-$(PKG_TAG)_checksums.txt
 
 release-vmutils: \
-	vmagent-prod \
-	vmalert-prod \
-	vmauth-prod \
-	vmbackup-prod \
-	vmrestore-prod
-	cd bin && tar czf vmutils-$(PKG_TAG).tar.gz vmagent-prod vmalert-prod vmauth-prod vmbackup-prod vmrestore-prod && \
-		sha256sum vmutils-$(PKG_TAG).tar.gz > vmutils-$(PKG_TAG)_checksums.txt
+	release-vmutils-amd64 \
+	release-vmutils-arm64
 
-release-vmutils-arm64: \
-	vmagent-arm64-prod \
-	vmalert-arm64-prod \
-	vmauth-arm64-prod \
-	vmbackup-arm64-prod \
-	vmrestore-arm64-prod
-	cd bin && tar czf vmutils-arm64-$(PKG_TAG).tar.gz vmagent-arm64-prod vmalert-arm64-prod vmauth-arm64-prod vmbackup-arm64-prod vmrestore-arm64-prod && \
-		sha256sum vmutils-arm64-$(PKG_TAG).tar.gz > vmutils-arm64-$(PKG_TAG)_checksums.txt
+release-vmutils-amd64:
+	GOARCH=amd64 $(MAKE) release-vmutils-generic
 
+release-vmutils-arm64:
+	GOARCH=arm64 $(MAKE) release-vmutils-generic
+
+release-vmutils-generic: \
+	vmagent-$(GOARCH)-prod \
+	vmalert-$(GOARCH)-prod \
+	vmauth-$(GOARCH)-prod \
+	vmbackup-$(GOARCH)-prod \
+	vmrestore-$(GOARCH)-prod
+	cd bin && \
+		tar --transform="flags=r;s|-$(GOARCH)||" -czf vmutils-$(GOARCH)-$(PKG_TAG).tar.gz \
+			vmagent-$(GOARCH)-prod \
+			vmalert-$(GOARCH)-prod \
+			vmauth-$(GOARCH)-prod \
+			vmbackup-$(GOARCH)-prod \
+			vmrestore-$(GOARCH)-prod \
+		&& sha256sum vmutils-$(GOARCH)-$(PKG_TAG).tar.gz \
+			vmagent-$(GOARCH)-prod \
+			vmalert-$(GOARCH)-prod \
+			vmauth-$(GOARCH)-prod \
+			vmbackup-$(GOARCH)-prod \
+			vmrestore-$(GOARCH)-prod \
+			| sed s/-$(GOARCH)// > vmutils-$(GOARCH)-$(PKG_TAG)_checksums.txt
 
 pprof-cpu:
 	go tool pprof -trim_path=github.com/VictoriaMetrics/VictoriaMetrics@ $(PPROF_FILE)
diff --git a/app/vmselect/graphite/tags_api.go b/app/vmselect/graphite/tags_api.go
index ba46aeb2d..e1728932f 100644
--- a/app/vmselect/graphite/tags_api.go
+++ b/app/vmselect/graphite/tags_api.go
@@ -357,26 +357,29 @@ func TagsFindSeriesHandler(startTime time.Time, w http.ResponseWriter, r *http.R
 
 func getCanonicalPaths(mns []storage.MetricName) []string {
 	paths := make([]string, 0, len(mns))
-	var b []byte
-	var tags []storage.Tag
 	for _, mn := range mns {
-		b = append(b[:0], mn.MetricGroup...)
-		tags = append(tags[:0], mn.Tags...)
-		sort.Slice(tags, func(i, j int) bool {
-			return string(tags[i].Key) < string(tags[j].Key)
-		})
-		for _, tag := range tags {
-			b = append(b, ';')
-			b = append(b, tag.Key...)
-			b = append(b, '=')
-			b = append(b, tag.Value...)
-		}
-		paths = append(paths, string(b))
+		path := getCanonicalPath(&mn)
+		paths = append(paths, path)
 	}
 	sort.Strings(paths)
 	return paths
 }
 
+func getCanonicalPath(mn *storage.MetricName) string {
+	b := append([]byte{}, mn.MetricGroup...)
+	tags := append([]storage.Tag{}, mn.Tags...)
+	sort.Slice(tags, func(i, j int) bool {
+		return string(tags[i].Key) < string(tags[j].Key)
+	})
+	for _, tag := range tags {
+		b = append(b, ';')
+		b = append(b, tag.Key...)
+		b = append(b, '=')
+		b = append(b, tag.Value...)
+	}
+	return string(b)
+}
+
 var tagsFindSeriesDuration = metrics.NewSummary(`vm_request_duration_seconds{path="/tags/findSeries"}`)
 
 // TagValuesHandler implements /tags/<tag_name> endpoint from Graphite Tags API.
diff --git a/app/vmselect/prometheus/prometheus.go b/app/vmselect/prometheus/prometheus.go
index c11f7e771..bd62b3cc6 100644
--- a/app/vmselect/prometheus/prometheus.go
+++ b/app/vmselect/prometheus/prometheus.go
@@ -41,6 +41,8 @@ var (
 		"By default it is automatically calculated from the median interval between samples. This flag could be useful for tuning "+
 		"Prometheus data model closer to Influx-style data model. See https://prometheus.io/docs/prometheus/latest/querying/basics/#staleness for details. "+
 		"See also '-search.maxLookback' flag, which has the same meaning due to historical reasons")
+	maxStepForPointsAdjustment = flag.Duration("search.maxStepForPointsAdjustment", time.Minute, "The maximum step when /api/v1/query_range handler adjusts "+
+		"points with timestamps closer than -search.latencyOffset to the current time. The adjustment is needed because such points may contain incomplete data")
 )
 
 // Default step used if not set.
@@ -1132,9 +1134,11 @@ func queryRangeHandler(startTime time.Time, w http.ResponseWriter, query string,
 	if err != nil {
 		return fmt.Errorf("cannot execute query: %w", err)
 	}
-	queryOffset := getLatencyOffsetMilliseconds()
-	if ct-queryOffset < end {
-		result = adjustLastPoints(result, ct-queryOffset, ct+step)
+	if step < maxStepForPointsAdjustment.Milliseconds() {
+		queryOffset := getLatencyOffsetMilliseconds()
+		if ct-queryOffset < end {
+			result = adjustLastPoints(result, ct-queryOffset, ct+step)
+		}
 	}
 
 	// Remove NaN values as Prometheus does.
diff --git a/app/vmselect/promql/rollup.go b/app/vmselect/promql/rollup.go
index 41cf242fa..3c62fbdc7 100644
--- a/app/vmselect/promql/rollup.go
+++ b/app/vmselect/promql/rollup.go
@@ -391,7 +391,7 @@ type rollupConfig struct {
 	// Whether window may be adjusted to 2 x interval between data points.
 	// This is needed for functions which have dt in the denominator
 	// such as rate, deriv, etc.
-	// Without the adjustement their value would jump in unexpected directions
+	// Without the adjustment their value would jump in unexpected directions
 	// when using window smaller than 2 x scrape_interval.
 	MayAdjustWindow bool
 
diff --git a/deployment/docker/Makefile b/deployment/docker/Makefile
index 07e37748e..dd28c0590 100644
--- a/deployment/docker/Makefile
+++ b/deployment/docker/Makefile
@@ -2,9 +2,9 @@
 
 DOCKER_NAMESPACE := victoriametrics
 
-ROOT_IMAGE ?= alpine:3.12.3
-CERTS_IMAGE := alpine:3.12.3
-GO_BUILDER_IMAGE := golang:1.15.6
+ROOT_IMAGE ?= alpine:3.13.0
+CERTS_IMAGE := alpine:3.13.0
+GO_BUILDER_IMAGE := golang:1.15.7
 BUILDER_IMAGE := local/builder:2.0.0-$(shell echo $(GO_BUILDER_IMAGE) | tr : _)
 BASE_IMAGE := local/base:1.1.1-$(shell echo $(ROOT_IMAGE) | tr : _)-$(shell echo $(CERTS_IMAGE) | tr : _)
 
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 43d0c23d6..640e1a5c6 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 # tip
 
+* FEATURE: added `search.maxStepForPointsAdjustment` command-line flag, which can be used for disabling adjustment for points returned `/api/v1/query_range` handler if such points have timestamps closer than `-search.latencyOffset` to the current time. Such points may contain incomplete data, so they are substituted by the previous values for `step` query args smaller than one minute by default.
+
+* BUGFIX: vmagent: reduce the HTTP reconnection rate to scrape targets. Previously vmagent could errorneusly close HTTP keep-alive connections more often than needed.
+
 
 # [v1.52.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.52.0)
 
@@ -306,7 +310,7 @@
 * BUGFIX: properly apply `-search.maxStalenessInterval` command-line flag value. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/784 .
 * BUGFIX: fix displaying data in Grafana tables. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/720 .
 * BUGFIX: do not adjust the number of detected CPU cores found at `/sys/devices/system/cpu/online`.
-  The adjustement was increasing the resulting GOMAXPROC by 1, which looked confusing to users.
+  The adjustment was increasing the resulting GOMAXPROC by 1, which looked confusing to users.
   See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/685#issuecomment-698595309 .
 * BUGFIX: vmagent: do not show `-remoteWrite.url` in initial logs if `-remoteWrite.showURL` isn't set. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/773 .
 * BUGFIX: properly handle case when [/metrics/find](https://victoriametrics.github.io/#graphite-metrics-api-usage) finds both a leaf and a node for the given `query=prefix.*`.
diff --git a/go.mod b/go.mod
index 9f17874af..120fb499f 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 
 	// Do not use the original github.com/valyala/fasthttp because of issues
 	// like https://github.com/valyala/fasthttp/commit/996610f021ff45fdc98c2ce7884d5fa4e7f9199b
-	github.com/VictoriaMetrics/fasthttp v1.0.11
+	github.com/VictoriaMetrics/fasthttp v1.0.12
 	github.com/VictoriaMetrics/metrics v1.12.3
 	github.com/VictoriaMetrics/metricsql v0.10.0
 	github.com/aws/aws-sdk-go v1.36.25
diff --git a/go.sum b/go.sum
index 5d16b8949..f5fb720ae 100644
--- a/go.sum
+++ b/go.sum
@@ -81,8 +81,8 @@ github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWX
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/VictoriaMetrics/fastcache v1.5.7 h1:4y6y0G8PRzszQUYIQHHssv/jgPHAb5qQuuDNdCbyAgw=
 github.com/VictoriaMetrics/fastcache v1.5.7/go.mod h1:ptDBkNMQI4RtmVo8VS/XwRY6RoTu1dAWCbrk+6WsEM8=
-github.com/VictoriaMetrics/fasthttp v1.0.11 h1:6XOvE1pF/EhW8qoi7V5qJQJ2rhNV+UGrb1/a9vMbTiw=
-github.com/VictoriaMetrics/fasthttp v1.0.11/go.mod h1:3SeUL4zwB/p/a9aEeRc6gdlbrtNHXBJR6N376EgiSHU=
+github.com/VictoriaMetrics/fasthttp v1.0.12 h1:Ag0E119yrH4BTxVyjKD9TeiSImtG9bUcg/stItLJhSE=
+github.com/VictoriaMetrics/fasthttp v1.0.12/go.mod h1:3SeUL4zwB/p/a9aEeRc6gdlbrtNHXBJR6N376EgiSHU=
 github.com/VictoriaMetrics/metrics v1.12.2/go.mod h1:Z1tSfPfngDn12bTfZSCqArT3OPY3u88J12hSoOhuiRE=
 github.com/VictoriaMetrics/metrics v1.12.3 h1:Fe6JHC6MSEKa+BtLhPN8WIvS+HKPzMc2evEpNeCGy7I=
 github.com/VictoriaMetrics/metrics v1.12.3/go.mod h1:Z1tSfPfngDn12bTfZSCqArT3OPY3u88J12hSoOhuiRE=
diff --git a/lib/mergeset/part_search.go b/lib/mergeset/part_search.go
index 79ed0968f..c2ef73de2 100644
--- a/lib/mergeset/part_search.go
+++ b/lib/mergeset/part_search.go
@@ -77,6 +77,7 @@ func (ps *partSearch) Init(p *part, shouldCacheBlock func(item []byte) bool) {
 	ps.p = p
 	ps.idxbCache = p.idxbCache
 	ps.ibCache = p.ibCache
+	ps.shouldCacheBlock = shouldCacheBlock
 }
 
 // Seek seeks for the first item greater or equal to k in ps.
diff --git a/vendor/github.com/VictoriaMetrics/fasthttp/client.go b/vendor/github.com/VictoriaMetrics/fasthttp/client.go
index 7ff9f9cbf..5f1f433d6 100644
--- a/vendor/github.com/VictoriaMetrics/fasthttp/client.go
+++ b/vendor/github.com/VictoriaMetrics/fasthttp/client.go
@@ -571,6 +571,14 @@ type clientConn struct {
 	lastWriteDeadlineTime time.Time
 }
 
+func (cc *clientConn) reset() {
+	cc.c = nil
+	cc.createdTime = zeroTime
+	cc.lastUseTime = zeroTime
+	cc.lastReadDeadlineTime = zeroTime
+	cc.lastWriteDeadlineTime = zeroTime
+}
+
 var startTimeUnix = time.Now().Unix()
 
 // LastUseTime returns time the client was last used
@@ -1252,7 +1260,7 @@ func acquireClientConn(conn net.Conn) *clientConn {
 }
 
 func releaseClientConn(cc *clientConn) {
-	cc.c = nil
+	cc.reset()
 	clientConnPool.Put(cc)
 }
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index db483be9d..d13bfe521 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -10,7 +10,7 @@ cloud.google.com/go/internal/version
 cloud.google.com/go/storage
 # github.com/VictoriaMetrics/fastcache v1.5.7
 github.com/VictoriaMetrics/fastcache
-# github.com/VictoriaMetrics/fasthttp v1.0.11
+# github.com/VictoriaMetrics/fasthttp v1.0.12
 github.com/VictoriaMetrics/fasthttp
 github.com/VictoriaMetrics/fasthttp/fasthttputil
 github.com/VictoriaMetrics/fasthttp/stackless