Re: Performance problems with postgres and null Values? - Mailing list pgsql-performance

Thx.

All queries are now running as usual.

Thx for helping me.

Best regards
Sven

-----Ursprüngliche Nachricht-----
Von: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org] Im Auftrag von Albe Laurenz
Gesendet: Montag, 25. April 2016 10:08
An: 'Sven Kerkling *EXTERN*'; 'Merlin Moncure'
Cc: 'postgres performance list'
Betreff: Re: [PERFORM] Performance problems with postgres and null Values?

Sven Kerkling wrote:
> This one ist the burden, running at least 100 seconds:
>
>     SELECT b.id, b.status
>     FROM export b, masterNew mb
>     WHERE mb.sperre IS NULL
>       AND mb.status IS NULL
>       AND b.id = mb.id
>     LIMIT 100;
>
> http://explain.depesz.com/s/eAqG

I think the problem is here:

Bitmap Index Scan on masterNew_2016_pi_idx (cost=0.00..5.34 rows=181 width=0) (actual time=805.225..805.225
rows=4,764,537loops=1) 

Perhaps you should ANALYZE "masterNew" to get better statistics.

Yours,
Laurenz Albe

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