Re: tunning an index build

Do you use those 1.5G through pga_aggregate_traget?

If so, try to use more memory by switching your session to workarea_size_policy=manual and dedicating as much to sort_area_size as you can.

Make sure you spent enough time on temp I/O before doing that.

On 7/17/07, genegurevich_at_discover.com <genegurevich_at_discover.com> wrote:
> Hi all:
>
> I think I have posted on this issue before, but I can't find my old Emails
> so - sorry for the repeated question.
> Here is the situation. I am running oracle 9208 and have a 40G table with
> a lot of indices - mostly bitmap
> Their sizes are under 1G. These indices take about 20 to 30 minutes to
> build. That seems to be too long.
> I have just waited for 24 minutes to build a 82M index. The index is
> parallelized 4 way, the table is
> parallelized 6 ways. I have 2G sga and 1.5G pga. I do see a lot of IO waits
> (via vmstat) and I have UNIX
> team looking into that. I think I have plenty of memory and the parallelizm
> should be enough for a small index.
>
> Any thoughts on what else I should look at?
>
> thank you
>
> Gene Gurevich
>
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>

-- 
Alex Fatkulin,
The Pythian Group,
http://www.pythian.com/blogs/author/alexf/
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