Le 05/04/2013 16:18, Nikolas Everett a écrit :
On Fri, Apr 5, 2013 at 9:55 AM, Franck Routier
<[email protected] <mailto:[email protected]>> wrote:
Le 04/04/2013 21:08, Tom Lane a écrit :
Maybe the statistics tables for sandia and saneds are in a bad
shape ? (don't know how to check this).
Regards,
Franck
Could this be caused by system table bloat?
Also, can you check how long it takes to plan:
1. A query without a table at all (SELECT NOW())
2. A query with an unrelated table
Again, what version of PostgreSQL is this?
PG 8.4.8 select now() is quick (15ms from pgadmin)But I can reproduce the problem on other tables : explain on a query with 4 join takes 4.5 seconds on an other set of tables...
System bloat... maybe. Not sure how to check. But as Tom asked, default_statistics_target is 5000. Maybe the problem is here ? What should I look after in pg_statistic to tell is there is a prolem here ?
Regards, Franck
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