Add Incoming-defer-ratio description

docs/01_nodeos/03_plugins/producer_plugin/index.md

@@ -92,9 +92,10 @@ Config Options for eosio::producer_plugin:
                                         transactions in any block before 
                                         returning to normal transaction 
                                         processing.
-  --incoming-defer-ratio arg (=1)       ratio between incoming transations and 
+  --incoming-defer-ratio arg (=1)       ratio between incoming transactions and 
                                         deferred transactions when both are 
-                                        exhausted
+                                        queued for execution                                        
+
   --producer-threads arg (=2)           Number of worker threads in producer 
                                         thread pool
   --snapshots-dir arg (="snapshots")    the location of the snapshots directory
@@ -106,6 +107,21 @@ Config Options for eosio::producer_plugin:
 
 * [`chain_plugin`](../chain_plugin/index.md)
 
+## The priority of transaction
+
+You can give one of the transaction types priority over another when the producer plugin has a queue of transactions pending.
+
+The option below sets the ratio between the incoming transaction and the deferred transaction:
+
+```console
+  --incoming-defer-ratio arg (=1)       
+```
+
+By default value of `1`, the `producer` plugin processes one incoming transaction per deferred transaction. When `arg` sets to `10`, the `producer` plugin processes 10 incoming transactions per deferred transaction. 
+
+If the `arg` is set to a sufficiently large number, the plugin always processes the incoming transaction first until the queue of the incoming transactions is empty. Respectively, if the `arg` is 0, the `producer` plugin processes the deferred transactions queue first.
+
+
 ### Load Dependency Examples
 
 ```console