diff --git a/doc/reference/configuration/cfg_replication.rst b/doc/reference/configuration/cfg_replication.rst
index 00fc844334..d09be69f3f 100644
--- a/doc/reference/configuration/cfg_replication.rst
+++ b/doc/reference/configuration/cfg_replication.rst
@@ -10,6 +10,7 @@
 * :ref:`instance_uuid <cfg_replication-instance_uuid>`
 * :ref:`replication_synchro_quorum <cfg_replication-replication_synchro_quorum>`
 * :ref:`replication_synchro_timeout <cfg_replication-replication_synchro_timeout>`
+* :ref:`replication_threads <cfg_replication-replication_replication_threads>`
 * :ref:`election_mode <cfg_replication-election_mode>`
 * :ref:`election_timeout <cfg_replication-election_timeout>`
 * :ref:`election_fencing_enabled <cfg_replication-election_fencing_enabled>`
@@ -482,6 +483,27 @@
     | Environment variable: TT_REPLICATION_SYNCHRO_TIMEOUT
     | Dynamic: **yes**
 
+.. _cfg_replication-replication_replication_threads:
+
+.. confval:: replication_threads
+
+    Since version :doc:`2.10.0 </release/2.10.0>`.
+    The number of threads spawned to decode the incoming replication data.
+
+    The default value is `1`.
+    It means that a single separate thread handles all the incoming replication streams.
+    In most cases, one thread is enough for all incoming data.
+    Therefore, it is likely that the user will not need to set this configuration option.
+
+    Possible values range from 1 to 1000.
+    If there are multiple replication threads, connections to serve are distributed evenly between the threads.
+
+    | Type: number
+    | Default: 1
+    | Possible values: from 1 to 1000
+    | Environment variable: TT_REPLICATION_THREADS
+    | Dynamic: **no**
+
 ..  _cfg_replication-election_mode:
 
 ..  confval:: election_mode