May 17, 2026, 11:40 PM

inbox/DataBase/PostgreSQL/maintenance/vacuum.sql

@@ -0,0 +1,25 @@
+VACUUM - >  REMOVES DEAD ROWS, AND MARK THEM FOR REUSE, BUT IT DOESN’T RETURN THE SPACE TO ORACLE,. IT DOESN'T NEED EXCLUSIVE LOCK ON THE TABLE.
+
+-------------------------------------------------------------------------
+
+vacuum a table:
+
+dbaclass=# vacuum dbatest.emptab;
+VACUUM
+
+both vacuum and analyze:
+
+dbaclass=# vacuum analyze dbatest.emptab;
+VACUUM
+
+with verbose:
+
+dbaclass# vacuum verbose analyze dbatest.emptab;
+
+Monitor vacuum process( if vacuum process runs for a long time)
+
+dbaclass#select * from pg_stat_progress_vacuum;
+
+Check vacuum related information for the table
+
+dbaclass=# select schemaname,relname,last_vacuum,vacuum_count from pg_stat_user_tables where relname='emptab';