Re: Minimum Available Central Storage Frames (Average %) Question

2008-10-16 Thread Ron Hawkins 
Mohd,

The simple answer is that unreferenced pages will be stolen so that the
available frame queue does not go to zero. However the ways and means with
which pages chosen to be moved to and from the Page datasets is rather more
complex than that statement. 

I suggest you read the Initialization and Tuning guide to get an
understanding of how processor resources are managed.

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/iea2e151/CONTENTS
?SHELF=EZ2ZO10L.bksDT=20080119071214#3.4.2.4

You may also want to look at conference proceedings from CMG and Share for
information. Memory management is one area where z/OS is by far the
consummate Operating System, and it would be good for you to understand why.

Ron



 -Original Message-
 From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
 Behalf Of Mohd Shahrifuddin

snip

 
 Any other suggestion is much appreciated
 
 Thanks in advance for all reply.
 
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Minimum Available Central Storage Frames (Average %) Question

2008-10-15 Thread Mohd Shahrifuddin 
Dear Lister,

Environment: 
OS390/2.10
9672/R16 (G5 machine)

From the RMF report show decreasing Minimum Available Central Storage
Frames. Table below show the decreasing:

DateMinimum Central 
3/3/200847.95   
3/4/200853.44   CICSrestart
:
9/18/2008   23.1
9/19/2008   20.85   
9/20/2008   19.23   
9/21/2008   16.82   
9/22/2008   14.83   
9/23/2008   13.14   
9/24/2008   53.43   System IPL
:
10/8/2008   50.46   
10/9/2008   50.41   
10/10/2008  50.11   
10/11/2008  49.82   
10/12/2008  49.87   
10/13/2008  49.57   
10/14/2008  49.07   
10/15/2008  46.71   

After we shutdown CICS or IPL system this frame will increase back. 

Question:
1. What happen if the out frame? 
2. Any tool, setup, Rexx or Fixes can to reclaim the unused frame?
3. If we need to IPL OS/390 or shutdown CICS system regularly? (i.e Once a
month)

Any other suggestion is much appreciated

Thanks in advance for all reply.

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