2010/1/8 Alban Hertroys <dalroi@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:
> Did you turn off seqscans in the postgres.conf?
Seq scan is enabled.
> Could you try a "REINDEX TABLE attachment" again in case you somehow reindexed the wrong index or table?
How about this test?
On a dump from before the rows were gone:
# select count(*) from attachment where when_uploaded < '2010-01-01';
count
----------
22523642
(1 row)
On production database:
# explain select count(*) from attachment where when_uploaded < '2010-01-01';
QUERY PLAN
--------------------------------------------------------------------------------------
Aggregate (cost=1794931.20..1794931.21 rows=1 width=0)
-> Seq Scan on attachment (cost=0.00..1738076.24 rows=22741985 width=0)
Filter: (when_uploaded < '2010-01-01 00:00:00'::timestamp
without time zone)
(3 rows)
# select count(*) from attachment where when_uploaded < '2010-01-01';
count
----------
22523639
(1 row)
--
Konrad Garus
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