Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
CICS dynamically allocates LSRPOOLs??

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CICS
View previous topic :: :: View next topic  
Author Message
rakeshreddy
Warnings : 1

New User


Joined: 21 Mar 2007
Posts: 28
Location: Bangalore

PostPosted: Fri Nov 20, 2009 8:28 pm    Post subject: CICS dynamically allocates LSRPOOLs??
Reply with quote

Hi,

My questions are about LSRPOOL.

1) Can any one explain me the Differance between "Allowing CICS to build LSRpools Dynamically" AND " Defining LSRpools in CSD".

2) I have a file defined in CICS with LSR =3, but i didn't define any
LSRpools in CICS. In this case will CICS creates a LSR 3 POOL or it
allocates the file in POOL 1 by dynamically creating pool 1.

3) Is there a System initialize parameter to stop CICS allocating LSRPOOL. I mean, OPEN request of a file which is referring to a pool which is not created should fail.
Back to top
View user's profile Send private message

Robert Sample

Global Moderator


Joined: 06 Jun 2008
Posts: 8165
Location: East Dubuque, Illinois, USA

PostPosted: Fri Nov 20, 2009 9:00 pm    Post subject:
Reply with quote

1. You may know specifics about an LSRPOOL that would allow you to define the pool better than CICS defaults (such as needing more strings than normal). Much of the time, it's fine to let CICS do the definition but it all depends.

2. CICS would define LSRPOOL 3 using defaults. CICS allows up to (IIRC) 8 LSR pools. If you tell CICS LSR=3, it's not going to change that to LSR=1.

3. Why on earth would you not want to use LSR pools? They are a performance boost in almost all cases. You can specify LSR=NONE for a particular file if you absolutely don't want the buffers shared, but that may cause a performance hit to the region.
Back to top
View user's profile Send private message
Bill O'Boyle

CICS Moderator


Joined: 14 Jan 2008
Posts: 2504
Location: Atlanta, Georgia, USA

PostPosted: Fri Nov 20, 2009 9:26 pm    Post subject: Reply to: CICS dynamically allocates LSRPOOLs??
Reply with quote

As strange as this may sound, VSE supports 15 LSR Pools. icon_eek.gif

The OP should also look at defining Read-Only files (in their respective FCT entries) as CICS Data-Tables as they will yield better performance than LSR and don't involve any I-O whatsoever.

But (IIRC), ESDS files cannot be defined as Data-Tables. icon_sad.gif

As Robert has said, you really don't want CICS automatically building LSR pools unless you have good reason.

Bill
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CICS All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Identifying Interfaces in CICS/mainframe Ashishpanpaliya CICS 5 Fri Oct 13, 2017 3:21 pm
No new posts Accessing CICS tran with map from JCL... navdeepaggarwal CICS 5 Tue Oct 03, 2017 6:15 pm
No new posts Partial color change of a field in CI... waseem0424 CICS 5 Fri Sep 29, 2017 7:56 pm
No new posts FUSE - IBM MQ - CICS integration error Kevin Vaz CICS 1 Mon Sep 18, 2017 4:31 pm
No new posts Julian Date to CICS ABSTTIME blayek CICS 3 Wed Aug 30, 2017 11:15 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us