Update example

Author: xuniq

doc/reference/reference_lua/box_info/synchro.rst

@@ -46,7 +46,11 @@ box.info.synchro
         Since version :doc:`2.5.3 </release/2.5.3>`, the option can be set as a dynamic formula.
         In this case, the value in the ``quorum`` member depends on the current number of replicas.
 
-    **Examples:**
+    **Example 1:**
+
+In this example, the ``quorum`` field is equal to ``1``.
+This means that the synchronous transactions work like asynchronous.
+`1` means that successful WAL write to the master is enough to commit.
 
     ..  code-block:: tarantoolsession
 
@@ -60,28 +64,51 @@ box.info.synchro
           quorum: 1
         ...
 
+    **Example 2:**
+
+//the description goes here
+
+
     ..  code-block:: tarantoolsession
 
+        -- Set quorum number and timeout
         tarantool> box.cfg{replication_synchro_quorum=2, replication_synchro_timeout=1000}
         ---
         ...
-        tarantool> s = box.schema.space.create("sync", {is_sync=true})
+
+        -- Check info about synchronous replication
+        tarantool> box.info.synchro
         ---
+        - queue:
+            owner: 0
+            term: 0
+            len: 0
+            busy: false
+          quorum: 2
         ...
+
+        -- Create a space and enable synchronous replication on this space
+        -- Create index
+        tarantool> s = box.schema.space.create("sync", {is_sync=true})
         tarantool> _ = s:create_index('pk')
         ---
         ...
+
+        -- Claim the queue with the promote function
         tarantool> box.ctl.promote()
         2022-09-15 14:27:11.734 [74314] main/103/interactive I> RAFT: bump term to 2, follow
         2022-09-15 14:27:11.734 [74314] main/118/raft_worker I> RAFT: persisted state {term: 2}
         ---
         ...
+
         tarantool> require('fiber').new(function() box.space.sync:replace{1} end)
         ---
         - status: suspended
           name: lua
           id: 119
         ...
+
+        -- Check the current state of synchronous replication.
         tarantool> box.info.synchro
         ---
         - queue:
@@ -109,6 +136,9 @@ box.info.synchro
           name: lua
           id: 122
         ...
+
+        -- Check the current state of synchronous replication.
+        -- Now there are 4 transactions waiting in the queue.
         tarantool> box.info.synchro
         ---
         - queue: