Re: Clarification of DSPFD output

I may be wrong here (already over my limit for the year so what the
heck) but I always believed that the Logical reads were the total
number of reads while Physical reads were those that did not came from
DB pages already in main storage - that is they required a physical
disk read.

 = Larry

Kris Vaidyanathan wrote:
> 
> When you do a DSPFD on a file on the there is some info that I need
> clarification on.
> I have a file that says the following..
> 
> Open Operations......................................77,875
> Close Operations......................................77,875
> Write Operations.......................................16,940
> Update Operations....................................0
> Delete Operations.....................................16,940
> Logical Reads........................................513,079,190
> Physical Reads......................................201,016,762
> 
> This is a highly volitile file used for passing trigger info around and I
> understand the Open Closes and Write/Update/Delete numbers.
> What do the Logical and Physical reads mean. This is an unkeyed physicalwith
> no logicals etc.
-- 
Larry Bolhuis         | What do you want to reload today?
Arbor Solutions, Inc  | 
(616) 451-2500        | Two rules to success in life:
lbolhui@ibm.net       | 1. Never tell people everything you know.
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