Add lua memory option (#4736)

* Add lua memory option

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* some reviewer's suggestions made

* some reviewer's suggestions made

Author: maryiaLichko

doc/reference/configuration/configuration_reference.rst

@@ -3133,6 +3133,43 @@ log.syslog.*
     | Default: box.NULL
     | Environment variable: TT_LOG_SYSLOG_SERVER
 
+.. _configuration_reference_lua:
+
+lua
+---
+
+The ``lua`` section outlines the configuration parameters related to the Lua environment within Tarantool.
+
+.. NOTE::
+
+    ``lua`` can be defined in any :ref:`scope <configuration_scopes>`.
+
+..  NOTE::
+
+- :ref:`lua.memory <configuration_reference_lua>`
+
+
+.. _configuration_reference_lua_memory:
+
+.. confval:: lua.memory
+
+Specifies the maximum memory amount available to Lua scripts, measured in bytes.
+
+ |
+ | Type: integer
+ | Default Value: 2147483648 (2GB)
+ | Environment variable: TT_LUA_MEMORY
+
+When the specified value exceeds the current memory usage, the new limit takes effect immediately without a restart.
+However, **when the specified value is lower than the current memory usage, a restart of the instance is required** for the change to take effect.
+
+Example to set the Lua memory limit to 4 GB:
+
+.. code-block:: yaml
+
+    lua:
+        memory: 4294967296
+
 ..  _configuration_reference_memtx:
 
 memtx