diff --git a/app/vmagent/README.md b/app/vmagent/README.md
index 22d2c6403..6e8ecce51 100644
--- a/app/vmagent/README.md
+++ b/app/vmagent/README.md
@@ -249,6 +249,9 @@ This information may be useful for debugging target relabeling.
       'match[]': ['{__name__!=""}']
   ```
 
+* If `vmagent` scrapes big number of targets, then `-promscrape.dropOriginalLabels` command-line flag could be used for reducing memory usage. This flag removes tracking the original
+  labels for scrape targets. Such labels may be useful for debugging at `/api/v1/targets` page, but they aren't used in other places.
+
 * It is recommended to increase `-remoteWrite.queues` if `vmagent_remotewrite_pending_data_bytes` metric exported at `http://vmagent-host:8429/metrics` page constantly grows.
 
 * If you see gaps on the data pushed by `vmagent` to remote storage when `-remoteWrite.maxDiskUsagePerURL` is set, then try increasing `-remoteWrite.queues`.
diff --git a/docs/vmagent.md b/docs/vmagent.md
index 22d2c6403..6e8ecce51 100644
--- a/docs/vmagent.md
+++ b/docs/vmagent.md
@@ -249,6 +249,9 @@ This information may be useful for debugging target relabeling.
       'match[]': ['{__name__!=""}']
   ```
 
+* If `vmagent` scrapes big number of targets, then `-promscrape.dropOriginalLabels` command-line flag could be used for reducing memory usage. This flag removes tracking the original
+  labels for scrape targets. Such labels may be useful for debugging at `/api/v1/targets` page, but they aren't used in other places.
+
 * It is recommended to increase `-remoteWrite.queues` if `vmagent_remotewrite_pending_data_bytes` metric exported at `http://vmagent-host:8429/metrics` page constantly grows.
 
 * If you see gaps on the data pushed by `vmagent` to remote storage when `-remoteWrite.maxDiskUsagePerURL` is set, then try increasing `-remoteWrite.queues`.