fix

Author: digoal

201702/20170227_01.md

@@ -403,7 +403,7 @@ schema，表名必须一致。
 2\. 在订阅端调用pg_replication_origin_advance(node_name text, pos pg_lsn)函数，node_name就是subscription name，pos指重新开始的LSN，从而跳过有冲突的事务。  
 
 ```  
-pg_replication_origin_advance(node_name text, pos pg_lsn)	  
+pg_replication_origin_advance(node_name text, pos pg_lsn)         
   
 Set replication progress for the given node to the given position.   
   
@@ -589,7 +589,7 @@ max_wal_size = 64GB
 min_wal_size = 32GB  
 checkpoint_completion_target = 0.05  
 checkpoint_flush_after = 0  
-max_wal_senders = 32  
+max_wal_senders = 48  
 max_replication_slots = 32  
 random_page_cost = 1.5  
 parallel_tuple_cost = 0  
@@ -928,8 +928,39 @@ dst=# select * from pg_replication_origin_status;
 3\. 在订阅端，delete, update 不存在记录，不报错  
 
 4\. 目前PostgreSQL逻辑复制还有很多优化空间，比如分组，比如合并，提升复制效率。  
+  
+5\. 相关系统表、视图、函数  
+  
+```
+pg_publication
+pg_stat_replication
+pg_replication_slots
+pg_subscription
+pg_stat_subscription
+pg_replication_origin_status
+```
+  
+6\. 相关语法  
+  
+```
+CREATE PUBLICATION
+
+CREATE SUBSCRIPTION
+```
+  
+7\. 相关参数  
+  
+```
+postgresql.conf
+max_worker_processes = 128  
+max_logical_replication_workers = 32  
+max_wal_senders = 48  
+max_replication_slots = 48 
+
+pg_hba.conf
+host replication postgres 0.0.0.0/0 md5 
+```
 
 ## 参考  
 https://www.postgresql.org/docs/devel/static/logical-replication.html  
 
-