diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 4abf0a598..b1823220d 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -385,7 +385,7 @@ in front of VictoriaMetrics. [Contact us](mailto:sales@victoriametrics.com) if y
   See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/807
 
 * BUGFIX: properly handle `inf` values during [background merge of LSM parts](https://medium.com/@valyala/how-victoriametrics-makes-instant-snapshots-for-multi-terabyte-time-series-data-e1f3fb0e0282).
-  Previously `Inf` values could result in `NaN` values for adjancent samples in time series. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/805 .
+  Previously `Inf` values could result in `NaN` values for adjacent samples in time series. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/805 .
 * BUGFIX: fill gaps on graphs for `range_*` and `running_*` functions. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/806 .
 * BUGFIX: make a copy of label with new name during relabeling with `action: labelmap` in the same way as Prometheus does.
   Previously the original label name has been replaced. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/812 .
diff --git a/docs/MetricsQL.md b/docs/MetricsQL.md
index dbf8dfd4c..b67cb4d3c 100644
--- a/docs/MetricsQL.md
+++ b/docs/MetricsQL.md
@@ -143,8 +143,8 @@ This functionality can be tried at [an editable Grafana dashboard](http://play-g
 - `first_over_time(m[d])` - returns the first value for `m` on the time range `d`.
 - `outliersk(N, q) by (group)` - returns up to `N` outlier time series for `q` in every `group`. Outlier time series have the highest deviation from the `median(q)`.
   This aggregate function is useful to detect anomalies across groups of similar time series.
-- `ascent_over_time(m[d])` - returns the sum of positive deltas between adjancent data points in `m` over `d`. Useful for tracking height gains in GPS track.
-- `descent_over_time(m[d])` - returns the absolute sum of negative deltas between adjancent data points in `m` over `d`. Useful for tracking height loss in GPS track.
+- `ascent_over_time(m[d])` - returns the sum of positive deltas between adjacent data points in `m` over `d`. Useful for tracking height gains in GPS track.
+- `descent_over_time(m[d])` - returns the absolute sum of negative deltas between adjacent data points in `m` over `d`. Useful for tracking height loss in GPS track.
 - `mode_over_time(m[d])` - returns [mode](https://en.wikipedia.org/wiki/Mode_(statistics)) for `m` values over `d`. It is expected that `m` values are discrete.
 - `mode(q) by (x)` - returns [mode](https://en.wikipedia.org/wiki/Mode_(statistics)) for each point in `q` grouped by `x`. It is expected that `q` points are discrete.
 - `rate_over_sum(m[d])` - returns rate over the sum of `m` values over `d` duration.
diff --git a/lib/storage/block_stream_writer.go b/lib/storage/block_stream_writer.go
index f80157b6b..5421a6656 100644
--- a/lib/storage/block_stream_writer.go
+++ b/lib/storage/block_stream_writer.go
@@ -42,7 +42,7 @@ type blockStreamWriter struct {
 
 	// prevTimestamps* is used as an optimization for reducing disk space usage
 	// when serially written blocks have identical timestamps.
-	// This is usually the case when adjancent blocks contain metrics scraped from the same target,
+	// This is usually the case when adjacent blocks contain metrics scraped from the same target,
 	// since such metrics have identical timestamps.
 	prevTimestampsData        []byte
 	prevTimestampsBlockOffset uint64
diff --git a/lib/storage/index_db.go b/lib/storage/index_db.go
index 855f10a7f..9e7011ee1 100644
--- a/lib/storage/index_db.go
+++ b/lib/storage/index_db.go
@@ -3535,7 +3535,7 @@ func mergeTagToMetricIDsRowsInternal(data []byte, items []mergeset.Item, nsPrefi
 		if len(item) == 0 || item[0] != nsPrefix || i == 0 || i == len(items)-1 {
 			// Write rows not starting with nsPrefix as-is.
 			// Additionally write the first and the last row as-is in order to preserve
-			// sort order for adjancent blocks.
+			// sort order for adjacent blocks.
 			dstData, dstItems = tmm.flushPendingMetricIDs(dstData, dstItems, mpPrev)
 			dstData = append(dstData, item...)
 			dstItems = append(dstItems, mergeset.Item{
diff --git a/lib/storage/storage.go b/lib/storage/storage.go
index c28a336d2..146310cee 100644
--- a/lib/storage/storage.go
+++ b/lib/storage/storage.go
@@ -1498,7 +1498,7 @@ func (s *Storage) add(rows []rawRow, mrs []MetricRow, precisionBits uint8) ([]ra
 	rows = rows[:rowsLen+len(mrs)]
 	j := 0
 	var (
-		// These vars are used for speeding up bulk imports of multiple adjancent rows for the same metricName.
+		// These vars are used for speeding up bulk imports of multiple adjacent rows for the same metricName.
 		prevTSID          TSID
 		prevMetricNameRaw []byte
 	)
@@ -1712,7 +1712,7 @@ func (s *Storage) updatePerDateData(rows []rawRow) error {
 	var hour uint64
 	var prevTimestamp int64
 	var (
-		// These vars are used for speeding up bulk imports when multiple adjancent rows
+		// These vars are used for speeding up bulk imports when multiple adjacent rows
 		// contain the same (metricID, date) pairs.
 		prevDate     uint64
 		prevMetricID uint64