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  • Subject: RE: New DB Performance Boost - For SQL Only!
  • From: "Allen, Stu" <sallen@xxxxxxxxxxxx>
  • Date: Mon, 3 Jul 2000 04:33:08 -0500

no, only through SQL.

Regards,
Stuart
                                                             
Stuart Allen
European Systems Analyst,  Fellowes
mailto:sallen@fellowes.com

> -----Original Message-----
> From: Chan Moon Wang, Daniel [SMTP:mwchan@jetta.com.hk]
> Sent: Monday, July 03, 2000 2:41 AM
> To:   'MIDRANGE-L@midrange.com'
> Subject:      RE: New DB Performance Boost - For SQL Only!
> 
> Will these PTF bebefit Logical File created by DDS
> 
> -----Original Message-----
> From: John Taylor [mailto:john.taylor@telusplanet.net]
> Sent: Friday, June 30, 2000 11:37 PM
> To: MIDRANGE-L@midrange.com
> Subject: New DB Performance Boost - For SQL Only!
> 
> 
> Folks,
> 
> With the recent discussion about about DDS .vs. SQL, I thought the
> following
> IBM announcement might be of interest to some of you. Here is an excerpt:
> 
> ---------------------------------
> Query Performance PTFs
> 
> A set of PTFs were recently made available that can have a direct impact
> on
> query performance. These new PTF's enable DB2 UDB for AS/400 to create
> indexes (also known as logical files or access paths) with a larger
> logical
> page size (64K). Most AS/400 indexes today have a logical page size of
> only
> 4K or 8K. This larger page size makes indexes more attractive to the query
> optimizer and allows the database paging to be more efficient on a query.
> For example, one customer after applying the PTF's saw a 40% decrease in
> run
> time for a set of 15 queries that they frequently run.
> 
> The larger page size only be used on indexes created over SQL tables and
> SQL-created indexes. The 64K logical page size will be used automatically
> for any index that is created over an SQL-created table - this includes
> both
> SQL-created indexes and indexes created for constraints.
> ---------------------------------
> 
> The full article text can be found at
> http://www.as400.ibm.com/db2/ixszptf.htm
> 
> 
> Regards,
> 
> John Taylor
> Canada
> 
> 
> 
> 
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