diff --git a/docs/victoriametrics/changelog/CHANGELOG.md b/docs/victoriametrics/changelog/CHANGELOG.md
index e3d6aca7e1..490b1db758 100644
--- a/docs/victoriametrics/changelog/CHANGELOG.md
+++ b/docs/victoriametrics/changelog/CHANGELOG.md
@@ -26,6 +26,8 @@ See also [LTS releases](https://docs.victoriametrics.com/victoriametrics/lts-rel
 
 ## tip
 
+* FEATURE: introduce `vm_filestream_fsync_duration_seconds_total` and `vm_filestream_fsync_calls_total` metrics, which can be used for detecting slow storage if it cannot keep up with the current data ingestion rate. See [#10432](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/10432).
+
 ## [v1.139.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.139.0)
 
 Released at 2026-03-27
@@ -1442,4 +1444,4 @@ See changes [here](https://docs.victoriametrics.com/victoriametrics/changelog/ch
 
 ## Previous releases
 
-See [releases page](https://github.com/VictoriaMetrics/VictoriaMetrics/releases).
\ No newline at end of file
+See [releases page](https://github.com/VictoriaMetrics/VictoriaMetrics/releases).
diff --git a/lib/filestream/filestream.go b/lib/filestream/filestream.go
index 2b853bb0bb..55e3c9ee72 100644
--- a/lib/filestream/filestream.go
+++ b/lib/filestream/filestream.go
@@ -286,8 +286,8 @@ var (
 	writtenBytesReal     = metrics.NewCounter(`vm_filestream_real_written_bytes_total`)
 	writersCount         = metrics.NewCounter(`vm_filestream_writers`)
 
-	fsyncDuration        = metrics.NewFloatCounter(`vm_filestream_fsync_duration_seconds_total`)
-	fsyncCalls           = metrics.NewCounter(`vm_filestream_fsync_calls_total`)
+	fsyncDuration = metrics.NewFloatCounter(`vm_filestream_fsync_duration_seconds_total`)
+	fsyncCalls    = metrics.NewCounter(`vm_filestream_fsync_calls_total`)
 )
 
 // Write writes p to the underlying file.