Re: REUSEDLT(*NO) vs. REUSEDLT(*YES)

[Vern Hamberg <vhamberg@xxxxxxxxxxxxxxx>]

Steve

You said that ever so much better than I did!   :)

Vern

----- Original Message -----
No real difference...the deleted record space should be used (in theory) before the file is extended.  But it will forestall the need to extend the file size (automatic or not) as frequently as it had been.

Steve Needles 


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jack Kingsley
Sent: Tuesday, September 10, 2013 12:49 PM
To: Midrange Systems Technical Discussion
Subject: Re: REUSEDLT(*NO) vs. REUSEDLT(*YES)

What about re-using deleted record space with a file that is setup as *NOMAX.


On Tue, Sep 10, 2013 at 1:33 PM, Needles,Stephen J < SNEEDLES@xxxxxxxxxxxxxxxx> wrote:

> We are having an internal debate to reuse deleted records or not.  The 
> most recent info I can find on the subject dates back to V5R4, we are 
> on V7R1.
>
> Here are a few of the issues that I am aware of REUSEDLT(*YES) will...
>
>
> -          Cause arrival sequence processing to require attention.
>
>
> -          SQL cursors without an ORDER BY will give data in seemingly
> random order according to the SQE's implementation of the request 
> (don't ask how we were bit by this :))
>
>
> -          May cause problems concerning access path maintenance, thus
> potentially impacting performance (as of V5R4, this did not appear to 
> be an issue any longer?).
>
>
> -          Modernizing the DB to DDL (from DDS) will result in tables that
> are REUSEDLT(*YES) by default as the CREATE TABLE SQL does not have 
> provision for restricting deleted row reuse.
>
>
> -          Does not completely exclude the need for periodic RGZPFM to be
> run on the tables.
>
> The question is... with enhancements to the SQE in V7R1 and 
> such...will
> REUSEDLT(*YES) provide a significant lessening of the need for RGZPFM 
> (perhaps annually or monthly versus weekly on select tables) without a 
> performance problem over time?
>
> Steve Needles
>
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