diff --git a/app/vmselect/promql/eval.go b/app/vmselect/promql/eval.go
index 023c209bb..e5b829a35 100644
--- a/app/vmselect/promql/eval.go
+++ b/app/vmselect/promql/eval.go
@@ -18,6 +18,7 @@ import (
 )
 
 var (
+	disableCache           = flag.Bool("search.disableCache", false, "Whether to disable response caching. This may be useful during data backfilling")
 	maxPointsPerTimeseries = flag.Int("search.maxPointsPerTimeseries", 30e3, "The maximum points per a single timeseries returned from the search")
 )
 
@@ -43,6 +44,11 @@ func ValidateMaxPointsPerTimeseries(start, end, step int64) error {
 //
 // See EvalConfig.mayCache for details.
 func AdjustStartEnd(start, end, step int64) (int64, int64) {
+	if *disableCache {
+		// Do not adjust start and end values when cache is disabled.
+		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/563
+		return start, end
+	}
 	points := (end-start)/step + 1
 	if points < minTimeseriesPointsForTimeRounding {
 		// Too small number of points for rounding.
@@ -117,6 +123,9 @@ func (ec *EvalConfig) validate() {
 }
 
 func (ec *EvalConfig) mayCache() bool {
+	if *disableCache {
+		return false
+	}
 	if !ec.MayCache {
 		return false
 	}
diff --git a/app/vmselect/promql/rollup_result_cache.go b/app/vmselect/promql/rollup_result_cache.go
index 51f8cbb3f..6bb1e5f88 100644
--- a/app/vmselect/promql/rollup_result_cache.go
+++ b/app/vmselect/promql/rollup_result_cache.go
@@ -21,7 +21,6 @@ import (
 )
 
 var (
-	disableCache         = flag.Bool("search.disableCache", false, "Whether to disable response caching. This may be useful during data backfilling")
 	cacheTimestampOffset = flag.Duration("search.cacheTimestampOffset", 5*time.Minute, "The maximum duration since the current time for response data, "+
 		"which is always queried from the original raw data, without using the response cache. Increase this value if you see gaps in responses "+
 		"due to time synchronization issues between VictoriaMetrics and data sources")
@@ -142,7 +141,7 @@ func ResetRollupResultCache() {
 }
 
 func (rrc *rollupResultCache) Get(ec *EvalConfig, expr metricsql.Expr, window int64) (tss []*timeseries, newStart int64) {
-	if *disableCache || !ec.mayCache() {
+	if !ec.mayCache() {
 		return nil, ec.Start
 	}
 
@@ -223,7 +222,7 @@ func (rrc *rollupResultCache) Get(ec *EvalConfig, expr metricsql.Expr, window in
 var resultBufPool bytesutil.ByteBufferPool
 
 func (rrc *rollupResultCache) Put(ec *EvalConfig, expr metricsql.Expr, window int64, tss []*timeseries) {
-	if *disableCache || len(tss) == 0 || !ec.mayCache() {
+	if len(tss) == 0 || !ec.mayCache() {
 		return
 	}