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RE: Installing 8.1.7

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Fri, 21 Sep 2001 11:57:12 -0700
Message-ID: <F001.003951DA.20010921121038@fatcity.com>

Ron - Sorry I wasn't clear. There are two alternatives for LMTs, automatic and uniform. You are entirely correct that there are many possibilities. Then I discovered the paper: "How to Stop Defragmenting and Start Living: The Definitive Word on Fragmentation"
http://metalink.oracle.com/cgi-bin/cr/getfile_cr.cgi?239049

This certainly sounded GREAT to me (I found it through the Gennick paper you reference). That mentions that Oracle has slightly different recommendations for Oracle8i. I found an Oracle paper "Fragmentation and Data Reorganization"
http://otn.oracle.com/deploy/availability/htdocs/fragment.html, which contains the following statements:

        Oracle has a number of recommendations:
        First, set all the extents in a tablespace to the same size (to me
that says Uniform).
        Second, . . . Choose tablespaces for segments based on three
recommended extent sizes, 128k, 4MB, or 128MB.

I believe that both papers are based on the same philosophy. At this point I am basing my physical layouts based on these two papers, believing that this represents the direction that Oracle is going. If you or anyone else has more information to contribute, I am eager to listen. Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Friday, September 21, 2001 2:10 PM To: Multiple recipients of list ORACLE-L

Dennis,
 I know that Oracle lists 3 sizes for the LMTbut you can specify any size extent if you do not use the "auto" feature. I have created a lot of different LMT extent sizes for tables that are like in size and activity. That way I have a better handle on the resources especually when the disks are a premium. Why put an active table initial 50 K next 50 K in a 128K tablespace. Why not manage the tablespace and make the extents 100 K?  

>From the ORAMAG article:"The Autuallocate option allows
Oracle to take control of the extent allocation. Oracle will use extent sizes of 64KB, 1MB, 8MB, and 64MB to manage space in the tablespace." The table created in the tablespace will adapt the auto extent policy of the tablespace and use increasingly larger extents as the table grows in size."  "Locally Managed Tablespaces"
by Jonathan Gennick. located at
http://www.oracle.com/oramag/oracle/00-nov/o60o8i.html      

Just a thought.
ROR mm

>>> DWILLIAMS_at_LIFETOUCH.COM 09/21/01 12:00PM >>>
Ramon -

  1. How to find the ideal size of the extent for a locally managed tablespace uniform size ? Oracle is recommending only three extent sizes: 128k, 4m, and 128m. See white papers at technet.oracle.com for further details on the new philosophy. Dennis Williams DBA Lifetouch, Inc. dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Friday, September 21, 2001 10:40 AM To: Multiple recipients of list ORACLE-L

Hi folks,  

Actually I have 8.0.5 and will install 8.1.7 in the weekend, and would like to have somethings clear.  

Actually I have just 2 tablespaces, but planning to make one for each application system,
will be like 7.  

Of course will make all kind of backups, cold, hot including redo logs, password files, parameter files and archives.  

What I am planning to do is make an export of the user owner of the all objects and
make and import in the new DB.  

  1. How to find the ideal size of the extent for a locally managed tablespace uniform size ?
  2. As far as I know, not much, the import will create the same tablespaces where the objects exists in the old DB in the new DB. Now, if I use an alter table move tablespace to move the tables to the new LMT tablespace, will it use the extent size of the new TBS or will remain with the old one ?
  3. I'm considering to recreate all the indexes.
  4. Is it a good idea to have an TBS for each APP system ?
  5. What are the consequences of having all of them with different extent size ?
  6. If by any chance some of them are going to have the same extent size wouldn't be better to put them in one TBS ?
  7. Any tips for sizing of the SGA, shared pool, log_buffers, sort_area_size ?
  8. Planning make db_block_size 8k
  9. My second step will be implement Forms Server, anything to include in the installation of have in mind from now ?

My DB is transactional, not that heavily, like 40 users, but like 12 of them are remote.  

Hardware
Compaq
2 Pentium III processor 800 mhz
6 Hard Drive 9.1 GB - raid 5
1 GB Memory
Win 2000 server    

Thanks in advance and sure that your help will be very, very useful.      

Ramon E. Estevez
com.banilejas_at_codetel.net.do <mailto:com.banilejas_at_codetel.net.do> Dominican Republic
809-565-3121  

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Author: DENNIS WILLIAMS
  INET: DWILLIAMS_at_LIFETOUCH.COM

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Received on Fri Sep 21 2001 - 13:57:12 CDT

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