SUBJECT:         APAR  NUMBER: PQ54398
 
REFERENCE:  AREA:     TPFDF CRUISE UTILITY
            SEGMENT:  IRCEDF13   - RELEASE:  TPFDF (Dsect)
            SEGMENT:  UF1F13     - RELEASE:  TPFDF (Assembler)
 
 
Pre-requisite APARs are (TPF only) :
FOR SEGMENT IRCEDF13   (Dsect)     - REL TPFDF
 PQ23489  PQ23871  
FOR SEGMENT UF1F13     (Assembler) - REL TPFDF
 PQ23489  PQ23871  PQ36341  PQ50700  
To be applied in the order listed for each segment.
 
ABSTRACT OF PROBLEM
___________________
The TPFDF CRUISE historical statistics file, IRCEDF, can grow to
an  excessive  size.  This  can  cause  the system to run low on
resources.
 
COMMENTS ON PROBLEM
___________________
TPFDF   APAR   PQ23489,   which   provided   support   for   the
Capture/Restore  Utility, Information and Statistics Environment
(CRUISE), defined the CRUISE historical statistics file, IRCEDF,
incorrectly. With the current definition, this file can grow  to
an  excessive size, potentially causing the system to run low on
resources. For example, this might occur when the file  is  dis-
played  using  the ZFCRU DIS-STATISTIC-ALL-id command. This file
should be defined as a  wraparound  (log)  file  with  a  finite
length.
 
SOLUTION
________
DSECT  IRCEDF  has  been  updated  to  define  this  file  as  a
wraparound file (add current), so that  the  size  of  the  file
(that  is,  the amount of historical data contained in the file)
is finite. DBDEF UF1F has been updated  to  define  the  maximum
number of chain blocks in the file to be 10.
 
DEPENDENCIES
____________
 
Related Segments Affected By This APAR.
_______________________________________
 
Segments to be assembled or compiled:
- None.
 
Segments to be link-edited:
- None.
 
Load Modules to be loaded:
- None.
 
Migration Considerations
========================
 
After loading this code (UF1F) to the system, the ZUDFM DEF INIT
command must be entered to have the changes take effect.
 
The CRUISE statistics file will now have a maximum size of 10 overflow
blocks. This means that when the size of the file reaches its maximum,
new data (CRUISE statistics) will replace the oldest data in the file
(as per TPFDF add current file behavior) and the oldest data will be
lost. This follows the traditional first-in-first-out (FIFO) model.
 
If the current size of the file is already greater than 10 overflow
blocks when this APAR is applied, the file will be automatically
truncated to 10 overflow blocks when an additional block is needed.
In addition, the oldest data will be lost.
 
See TPF Database Administration for more information about add
current files.
 
-- END APAR PQ54398
 
 
 


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