ERROR: relation "pg_buffercache" does not exist

建立pg_buffercache後,查詢時報錯:sql

postgres=# create extension pg_buffercache;
postgres=# select * from pg_buffercache;
ERROR:  relation "pg_buffercache" does not exist
LINE 1: select * from pg_buffercache;

  

緣由:消息'relation does not exist'一般是由於沒有鏈接到相應數據庫。由於我只是psql鏈接後,沒有切換到某個數據庫。數據庫

 

解決方法:post

\c yourDb
yourDb=# CREATE EXTENSION IF NOT EXISTS pg_buffercache;
yourDb=# SELECT count(*) FROM pg_buffercache;
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