Date:         Mon, 18 Nov 2002 22:18:41 +0100
Reply-To:     CICS List <CICS-L@LISTSERV.UGA.EDU>
Sender:       CICS List <CICS-L@LISTSERV.UGA.EDU>
From:         Roland Schiradin <roland@SCHIRADIN.DE>
Subject:      Re: COBOL 2.2 "Local Storage" vs "Working Storage"
In-Reply-To:  <FE8CC4E46D44D611A2990002A5F06C450106FC76@NRHCRE00>
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John,

from my understanding.

Working-Storage is not threadsafe. Means it exists as long as the LE
enclave (Cobol term run-unit) exist and if you enter the same program
several
times it remains in the last-used state. Local-Storage is threadsafe.

Local storage is obtained from the stack and LE contains his own
storage-managment
to avoid several getmain/freemain for a single local-storage. You should
check your STACK setting using the transaction CLER or parm-card in batch.

As CICS doesn't support multithreaded (POSIX) application it's not a big
issue
to change from Working-Storage to Local-Storage but it makes sure the
application programs are threadsafe and rent. Using the last-used state WS
feature is nice but in terms of CICS we should use temporary storage.

Roland


> -----Original Message-----
> From: CICS List [mailto:CICS-L@LISTSERV.UGA.EDU]On Behalf Of McKown,
> John
> Sent: Monday, November 18, 2002 8:15 PM
> To: CICS-L@LISTSERV.UGA.EDU
> Subject: COBOL 2.2 "Local Storage" vs "Working Storage"
>
>
> We plan to upgrade to COBOL for OS/390 2.2 in 2003 (yes, we're still VS
> COBOL II and even some OS/VS COBOL 2.4!). One thing that is new in this
> COBOL is LOCAL STORAGE. Is there any plus (or minus) to start using LOCAL
> STORAGE instead of WORKING STORAGE? I'm especially concerned
> about anything
> which could cause an increase in CPU utilization. From my reading, it
> appears that WORKING STORAGE would have less CPU overhead since
> it is gotten
> at the start of a run-unit whereas LOCAL STORAGE is gotten when
> the program
> is entered. But I'm not sure if this is really applicable to a
> CICS program.
> I'm not talking about a mass conversion, but for new development.
> Is there a
> manual which discusses this, especially in a CICS context? This will be in
> CICS 4.1 and CICS/TS 1.3.
>