Re: Bad choice of query plan from PG 7.3.6 to PG 7.3.9

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От Jona
Тема Re: Bad choice of query plan from PG 7.3.6 to PG 7.3.9
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Msg-id 427CADD3.6050106@oismail.com
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Ответ на Re: Bad choice of query plan from PG 7.3.6 to PG 7.3.9  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Bad choice of query plan from PG 7.3.6 to PG 7.3.9  (Tom Lane <tgl@sss.pgh.pa.us>)
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Wouldn't the VACUUM have made them equivalent??

anyway, here's the info for relpages:
Live Server: 424
Test Server: 338

Please note though that there're more rows on the live server than on the test server due to recent upload.
Total Row counts are as follows:
Live Server: 12597
Test Server: 11494

When the problems started the tables had identical size though.

Cheers
Jona

Tom Lane wrote:
Jona <jonanews@oismail.com> writes: 
Test Server:
comm=# VACUUM ANALYZE VERBOSE StatCon_Tbl;
INFO:  --Relation public.statcon_tbl--
INFO:  Pages 338: Changed 0, Empty 0; Tup 11494: Vac 0, Keep 0, UnUsed 0.       Total CPU 0.02s/0.00u sec elapsed 1.98 sec.
INFO:  --Relation pg_toast.pg_toast_179851--
INFO:  Pages 85680: Changed 0, Empty 0; Tup 343321: Vac 0, Keep 0, UnUsed 0.       Total CPU 1.75s/0.23u sec elapsed 30.36 sec.
INFO:  Analyzing public.statcon_tbl
VACUUM   
 
Live Server:
comm=# VACUUM ANALYZE VERBOSE StatCon_Tbl;
INFO:  --Relation public.statcon_tbl--
INFO:  Pages 424: Changed 0, Empty 0; Tup 12291: Vac 0, Keep 0, UnUsed 6101.       Total CPU 0.00s/0.01u sec elapsed 0.01 sec.
INFO:  --Relation pg_toast.pg_toast_891830--
INFO:  Pages 89234: Changed 0, Empty 0; Tup 352823: Vac 0, Keep 0, 
UnUsed 5487.       Total CPU 3.21s/0.47u sec elapsed 18.03 sec.
INFO:  Analyzing public.statcon_tbl
VACUUM   
Hm, the physical table sizes aren't very different, which suggests that
the problem must lie with the indexes.  Unfortunately, VACUUM in 7.3
doesn't tell you anything about indexes if it doesn't have any dead rows
to clean up.  Could you look at pg_class.relpages for all the indexes
of this table, and see what that shows?
		regards, tom lane

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