RE: Ready to scrap an AS/400

[pytel@xxxxxxxxxx]

> 1. SQL database IO requires about 10 times more memory than an RPG
program
> and between 5 and 100 times more CPU cycles.

I would not say that SQL is much less efficient then native DB.
It depends (as is often) on how SQL is used.
SQL tends to be less efficient for single-record access.
But it also tends to be much more efficient to operate on sets of records.
Switching to SQL requires somes change in application design, a step which
is often overlooked.


> 5. Most client server applications are written in C.  C programmers use a
> lot of pointers.  On Unix and NT machines, C pointers are very efficient
-
> modifying a pointer is a very light-weight operation.  On the AS/400,
> pointer manipulation requires considerably more CPU cycles.  The obvious
> throughput difference makes the AS/400 look bad compared to Unix and NT.

AS/400 pointer manipulation is no less efficient than on other platforms.


> 6. Performance monitoring has not kept up with client server
applications.
> For example, have any of you ever used SQL over ODBC (Client Access
Express)
> and tried to figure out which QZDASOINIT job belonged to you?

WRKOBJLCK xxx *USRPRF will show you all active jobs, associated with user
profile xxx.




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