postgres安裝pg_buffercache擴展

1.查看是否安裝了pg_buffercache

postgres=#  \dx
                      List of installed extensions
      Name      | Version |   Schema   |           Description           
----------------+---------+------------+---------------------------------
 plpgsql        | 1.0     | pg_catalog | PL/pgSQL procedural language
(1 rows)

2.查看當前服務器是否可使用pg_buffercache擴展

postgres=# select * from pg_available_extensions where name='pg_buffercache';

3.安裝pg_buffercache擴展

postgres-# create extension pg_buffercache;
postgres-# \dx
                      List of installed extensions
      Name      | Version |   Schema   |           Description           
----------------+---------+------------+---------------------------------
 pg_buffercache | 1.3     | public     | examine the shared buffer cache
 plpgsql        | 1.0     | pg_catalog | PL/pgSQL procedural language
(2 rows)

4.刪除pg_buffercache

postgres-# drop extension pg_buffercache;