Re: Stats and behavior weirdness
- From: "Kevin Lidh" <kevin.lidh@xxxxxxxxx>
- To: "Juan Carlos Reyes Pacheco" <juancarlosreyesp@xxxxxxxxx>
- Date: Mon, 6 Mar 2006 13:18:05 -0700
Wow, thank you Juan for those. They are explicitly set by the CRM
application to caching=0 and adj=1. When I changed them to 90 and 10
respectively, I got the same explain plan as on my Linux box and production
(and another instance tested later). Since I don't have any control over
the CRM application and there's a support issue when you make changes, I can
"fix" this with a stored outline. But I still don't understand why the
development database uses the same information as my Linux copy (as it is
just an export) and comes up with a different plan AND why it performs so
poorly. There is something out there that these values counter. But this
definitely gives me a direction to investigate.
On 3/6/06, Juan Carlos Reyes Pacheco <juancarlosreyesp@xxxxxxxxx> wrote:
>
> Hi Kevin, why don't you try to set this parameters in one session
> OPTIMIZER_INDEX_COST_ADJ = 10
> OPTIMIZER_INDEX_CACHING = 90
>
> When suddenly, the performance moves from seconds to almost an hours,
> without good reasons, I solve this settings this parameters, when the
> code can be improved.
>
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