Re: Slow insert in GTT

  • From: Toon Koppelaars <toon.koppelaars@xxxxxxxxxxx>
  • To: gheibia@xxxxxxxxx
  • Date: Wed, 25 Feb 2009 09:10:05 +0100

I would suggest creating a SQL trace file.
And start your analysis from there.
On Wed, Feb 25, 2009 at 8:49 AM, Amir Gheibi <gheibia@xxxxxxxxx> wrote:

> Hi listers,
> What could cause an Insert in a Global Temporary Table takes a lot of time?
> This is how I do the insert:
> Insert into TT (...)
> Select .. From ...
> The insert is being done in a SP.
> The Temp table is created with the "on commit preserve rows" option and
> that's because the table is used later in the SP.
> The select statement might returns 10,000 records.
> I have used a couple of hints in the select statement and the "Append" hint
> in the Insert (even though I don't like to use append as it locks the table)
> but still have the issue.
> I also understand that the PARALLEL hint will be ignored for inserts on
> GTTs. So I can't use that either.
> Any Idea, please?
> One more thing, the select statement is built upon a join between another
> temp table and a couple of permanent tables.
> Thanks.
> Amir

Toon Koppelaars
RuleGen BV

(co)Author: "Applied Mathematics for Database Professionals"

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