Re: [PERFORM] What happens between end of explain analyze and end of query execution ?

[Franck Routier]

Le 05/04/2013 16:18, Nikolas Everett a écrit :

On Fri, Apr 5, 2013 at 9:55 AM, Franck Routier <franck.rout...@axege.com <mailto:franck.rout...@axege.com>> 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)




Regards,
Franck

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 ?

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