new doc

Author: digoal zhou

201912/20191228_04.md

@@ -391,6 +391,7 @@ ethtool -L eth0 combined 32
 ```      
 yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm      
 yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm      
+yum install -y centos-release-scl
 yum install -y postgresql12*      
 yum install -y lvm2      
 ```      

202012/20201204_02.md

@@ -414,6 +414,8 @@ limit 20;
 
 使用了PG 13, GIN倒排索引, btree_gin插件支持jsonb+普通字段的组合搜索.  
 
+部署方法参考:  [《PostgreSQL 12 on 阿里云ecs 本地ssd VS essd pl3性能 - 含fio,fsync test,pgbench test，优缺点、云盘PG内核优化建议》](../201912/20191228_04.md)    
+  
 
 #### [PostgreSQL 许愿链接](https://github.com/digoal/blog/issues/76 "269ac3d1c492e938c0191101c7238216")
 您的愿望将传达给PG kernel hacker、数据库厂商等, 帮助提高数据库产品质量和功能, 说不定下一个PG版本就有您提出的功能点. 针对非常好的提议，奖励限量版PG文化衫、纪念品、贴纸、PG热门书籍等，奖品丰富，快来许愿。[开不开森](https://github.com/digoal/blog/issues/76 "269ac3d1c492e938c0191101c7238216").