Tobias Larsen <tobiasl@xxxxxxx> writes: > Oops, got it. Count(*) includes the rowcount of tables that inherit > from the table queried? I wasn't counting on that. To prevent inheriting tables from being scanned as well, run your query as; select count(*) from ONLY footable; > On Wed, May 8, 2013 at 4:44 PM, Tobias Larsen <tobiasl@xxxxxxx> wrote: > > This is a small, but weird problem. Completely regular table : > - requesting count in pgadmin shows 3124448 rows > - running SELECT count(*) via the query tool returns 5997620 > > Why is there a difference? There's nothing remotely remarkable about the table. > > I've run a full database VACUUM just to be certain > I've run VACUUM ANALYZE on that specific table > Database version is 9.1 (x64) on windows > > verbose output from vacuum is? > ---------------------------------------------------------------------------------------------- > INFO: ?vacuuming "public.<tablename>" > INFO: ?index "<tablename>_pkey" now contains 3124448 row versions in 12233 pages > DETAIL: ?0 index row versions were removed. > 0 index pages have been deleted, 0 are currently reusable. > CPU 0.09s/0.00u sec elapsed 0.09 sec. > INFO: ?index "<tablename>_character_id" now contains 3124448 row versions in 14898 pages > DETAIL: ?0 index row versions were removed. > 0 index pages have been deleted, 0 are currently reusable. > CPU 0.10s/0.00u sec elapsed 0.10 sec. > INFO: ?index "<tablename>_index" now contains 3124448 row versions in 14694 pages > DETAIL: ?0 index row versions were removed. > 0 index pages have been deleted, 0 are currently reusable. > CPU 0.07s/0.03u sec elapsed 0.10 sec. > INFO: ?index "<tablename>_key_idx" now contains 3124448 row versions in 23154 pages > DETAIL: ?0 index row versions were removed. > 0 index pages have been deleted, 0 are currently reusable. > CPU 0.12s/0.04u sec elapsed 0.16 sec. > INFO: ?"<tablename>": found 0 removable, 0 nonremovable row versions in 0 out of 104149 pages > DETAIL: ?0 dead row versions cannot be removed yet. > There were 0 unused item pointers. > 0 pages are entirely empty. > CPU 0.40s/0.07u sec elapsed 0.50 sec. > INFO: ?analyzing "public.<tablename>" > INFO: ?"<tablename>": scanned 30000 of 104149 pages, containing 900000 live rows and 0 dead rows; 30000 rows in > sample, 3124454 estimated total rows > INFO: ?analyzing "public.<tablename>" inheritance tree > INFO: ?"<tablename>": scanned 15628 of 104149 pages, containing 468840 live rows and 0 dead rows; 15628 rows in > sample, 3124451 estimated total rows > INFO: ?"archive_<tablename>": scanned 14372 of 95773 pages, containing 431160 live rows and 0 dead rows; 14372 > rows in sample, 2873175 estimated total rows > Query returned successfully with no result in 2611 ms. > ---------------------------------------------------------------------------------------------- > > ...So it would seem that PGAdmin is correct, but why am I getting the wrong number from SELECT Count(*)? > -- Jerry Sievers Postgres DBA/Development Consulting e: postgres.consulting@xxxxxxxxxxx p: 312.241.7800 -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
