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Re: Determine process of index build - HOW

From: Stephen Andert <StephenAndert_at_firsthealth.com>
Date: Thu, 03 Oct 2002 16:28:19 -0800
Message-ID: <F001.004E0483.20021003162819@fatcity.com>


George,

I'm not going to answer your question (since it already has been), but here are some ways to speed up the index builds:

  1. ALTER SESSION SET SORT_AREA_SIZE=100000000; As long as you have 100 MB of free physical memory on the machine, doing this before the index build will speed up the sort operations that are a part of the index build. I've even used higher numbers.
  2. Add the PARALLEL clause in the index build statement. If your table is partitioned, then the PARALLEL clause will use the number of partitions as the degree of parallelism, though you can change that if you want.
  3. Add the NOLOGGING clause in the index. After all, if the build fails, you're going to run it again not try to recover right?

Using these things together has made a huge improvement. One index build was running for over 8 hours. After changing these things (using 500MB for the sort area size since the machine had the available RAM) and the build ran in 10 minutes! This was on a table with over 30 million rows.

Good luck.
Stephen

>>> George.Leonard_at_za.didata.com 09/28/02 05:48AM >>>
Hi there

How can I see how far my index build has is.

I got a table with 43 mil records. It is taking forever as expected but
would like to see how far it is,

Any idea.

Oracle 8.1.6.3 (32Bit) on Solaris 2.6 on Sun E10K

George



George Leonard
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Received on Thu Oct 03 2002 - 19:28:19 CDT

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