Cherie - Most data warehouses are either doing queries (lots of full-table
scans) or bulk loading. The tradeoffs of block size experienced by OLTP
systems don't seem to apply (by this logic), so the advice is "the bigger
the block size the better". I built our system with 16K blocks because that
was the biggest I available at that version of Oracle. I would recommend
that you seriously consider 32K blocksize.
Our data warehouse is on RAID5, with Compaq Tru64 equipment, and my
system administrator says there isn't anything like choosing the stripe
size, so I can't offer any advice there.
Dennis Williams
DBA
Lifetouch, Inc.
[EMAIL PROTECTED]
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Sent: Thursday, April 25, 2002 10:24 AM
To: Multiple recipients of list ORACLE-L
We are building a new version 9.0.1 data warehouse on Sun Solaris 2.6
migrating to Solaris 2.8. We will be using striped disk that is striped
using Veritas Volume Manager on EMC disk.
The datawarehouse will be about 200 Gig. It will be written to throughout
the day.
To this point, almost all of our databases have been created with an 8k
block size. i'm not sure if that blocksize is optimal anymore. With 9i,
what block sizes are people using in the field nowadays for data
warehouses?
Also, if you use striped disk, what stripe size are you using and why?
Thanks for weighing in on this topic.
Cherie Machler
Oracle DBA
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