Re: Add os_page_num to pg_buffercache
Mircea Cadariu <cadariu.mircea@gmail.com>
From: Mircea Cadariu <cadariu.mircea@gmail.com>
To: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Cc: pgsql-hackers@lists.postgresql.org
Date: 2025-07-24T14:30:06Z
Lists: pgsql-hackers
Hi, Thanks for the update! I tried v5 and it returns the expected results on my laptop, same as before. Just two further remarks for your consideration. > + <para> > + number of OS memory page for this buffer > + </para></entry> Let's capitalize the first letter here. > +-- Check that the functions / views can't be accessed by default. To avoid > +-- having to create a dedicated user, use the pg_database_owner pseudo-role. > +SET ROLE pg_database_owner; > +SELECT count(*) > 0 FROM pg_buffercache_os_pages; > +RESET role; > + > +-- Check that pg_monitor is allowed to query view / function > +SET ROLE pg_monitor; > +SELECT count(*) > 0 FROM pg_buffercache_os_pages; > +RESET role; In the existing pg_buffercache.sql there are sections similar to the above (SET ROLE pg_database_owner/pg_monitor ... RESET role), with a couple of different SELECT statements within. Should we rather add the above new SELECTs there, instead of in the new pg_buffercache_os_pages.sql? Kind regards, Mircea Cadariu