Hello,
I have a customer that experience a strange behaviour related to statictics.
Threre is a vacuum analyze planned during the night.
The morning, 1 day out of 2, there are some extremely slow queries.
Those queries lasts more than 5 minutes (never waited more and cancelled them) whereas when everything is OK they last less than 300ms.
In order to resolve this i have to execute a least one analyze, sometimes more.
My Configuration:
Windows
PostgreSQL 8.4.8
default_statistics_target = 100
In addition to an increase for shared_buffers, work_mem, ..., i changed the default_statistics_target to 500 with no effect.
It was even worse as i never managed to get rid of the slow queries after running many analyze.
So i fell back to default_statistics_target=100 in order to get rid of those slow queries.
I have no idea of what i can do to solve this issue.
Any help would be greatly appreciated.
Cordialement,
Ghislain ROUVIGNAC
Ingénieur R&D![]()
7 rue Marcel Dassault - Z.A. La Mouline - 81990 Cambon d'Albi - FRANCE
Tel : 05 63 53 08 18 - Fax : 05 63 53 07 42 - www.sylob.com
7 rue Marcel Dassault - Z.A. La Mouline - 81990 Cambon d'Albi - FRANCE
Tel : 05 63 53 08 18 - Fax : 05 63 53 07 42 - www.sylob.com
Support : 05 63 53 78
35 - support@xxxxxxxxx
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