diff --git a/src/man1/mdbx_chk.1 b/src/man1/mdbx_chk.1
index da2e78fb..269a8246 100644
--- a/src/man1/mdbx_chk.1
+++ b/src/man1/mdbx_chk.1
@@ -81,6 +81,13 @@ Turn to a specified meta-page on successful check.
 .BR \-T
 Turn to a specified meta-page EVEN ON UNSUCCESSFUL CHECK!
 .TP
+.BR \-u
+Warms up the DB before checking via notifying OS kernel of subsequent access to the database pages.
+.TP
+.BR \-U
+Warms up the DB before checking, notifying the OS kernel of subsequent access to the database pages,
+then forcibly loads ones by sequential access and tries to lock database pages in memory.
+.TP
 .BR \-n
 Open MDBX environment(s) which do not use subdirectories.
 This is legacy option. For now MDBX handles this automatically.
diff --git a/src/man1/mdbx_copy.1 b/src/man1/mdbx_copy.1
index 3cb97a34..09cdaa5a 100644
--- a/src/man1/mdbx_copy.1
+++ b/src/man1/mdbx_copy.1
@@ -45,6 +45,13 @@ or unused pages will be omitted from the copy. This option will
 slow down the backup process as it is more CPU-intensive.
 Currently it fails if the environment has suffered a page leak.
 .TP
+.BR \-u
+Warms up the DB before copying via notifying OS kernel of subsequent access to the database pages.
+.TP
+.BR \-U
+Warms up the DB before copying, notifying the OS kernel of subsequent access to the database pages,
+then forcibly loads ones by sequential access and tries to lock database pages in memory.
+.TP
 .BR \-n
 Open MDBX environment(s) which do not use subdirectories.
 This is legacy option. For now MDBX handles this automatically.
diff --git a/src/man1/mdbx_dump.1 b/src/man1/mdbx_dump.1
index 417488e7..add3fe0e 100644
--- a/src/man1/mdbx_dump.1
+++ b/src/man1/mdbx_dump.1
@@ -66,6 +66,13 @@ Dump a specific subdatabase. If no database is specified, only the main database
 .BR \-r
 Rescure mode. Ignore some errors to dump corrupted DB.
 .TP
+.BR \-u
+Warms up the DB before dumping via notifying OS kernel of subsequent access to the database pages.
+.TP
+.BR \-U
+Warms up the DB before dumping, notifying the OS kernel of subsequent access to the database pages,
+then forcibly loads ones by sequential access and tries to lock database pages in memory.
+.TP
 .BR \-n
 Dump an MDBX database which does not use subdirectories.
 This is legacy option. For now MDBX handles this automatically.