Re: Execution plan changed after upgrade from 7.3.9 to 8.2.3

Thanks for the advice Tom !

Setting enable_nestloop = off did improve the query a much better way
than setting enable_seqscan to off.

It does not screw the costs either (I had very odd costs with
enable_seqscan to off like this : Nested Loop
(cost=400001665.30..400002197.96 rows=1 width=96)

Is there a "performance risk" to have enable_nestloop = off for other
queries ?

If I had the choice, should I go for index creation for the specific
tables or should I tweak the optimizer with enable_nestloop = off ?


Thanks again to all of you for your help.

Best Regards,
Vincent

Tom Lane wrote:
> <vincent.moreau@leroymerlin.fr> writes:
>
>> I was able to improve response time by seting enable_seqscan to off
>>
>
> enable_nestloop = off would probably be a saner choice, at least for
> this particular query.
>
>             regards, tom lane
>
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