Hi Renato,
Did you notice this statement at the beginning of the IQPPRM* chapter in the
init and tuning reference for z/OS 2.5...
Note: The IQPPRMxx will still be valid on IBM zEnterprise z15 and above
processors, but the tunable
options will no longer be available. Therefore, a message
Hi Chuck,
PRDB 2022081 16:09:11.83-D IQP
PRDB 2022081 16:09:11.83 IQP066I 16.09.11 DISPLAY IQP 681
zEDC Information
Have you confirmed the feature is installed and all parms set properly? It
almost appears it's GP's instead of zEDC.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Compagno Renato (Consulente per BCC Sistemi Informatici)
Sent:
Despite the fact that we have thousands of volumes we don't take full volume
dumps anywhere, so I cannot give our comparison. We also don't have TAPE
anymore. :-)
Perhaps open a ticket with IBM and let us know what IBM says?
Sorry guys
I realized that the table have lost their format then I resend them and I hope
this will enhances the readability
Jobchain On Z14 with ZCOMP:
JOBNAME Step CPU SRB
Count Min. Min.
PSDRB10114226.560.58
Hi,
First of all thank you for the answers.
Let me to add some additional measures:
On Z14 with ZCOMP:
JOBNAME
Step counters
CPU minutes
SRB Minutes
PSDRB101
142
26.56
0.58
PSDRB102
142
26.34
0.58
PSDRB103
142
25.7
0.56
PSDRB104
142
25.6
0.56
PSDRB105
142
25.63
0.58
PSDRB106
142
25.4
Have you looked at the amount of compression that you are getting when
comparing the z14 to the z15?
In our shop SMF data went from about 6:1 compression (z14) to 10:1. This is a
massive improvement.
I do not have the CPU stats, and I also really could not care. Dumps run at
night when we have
On 19/03/2022 4:44 am, Compagno Renato (Consulente per BCC Sistemi
Informatici) wrote:
Then on Z14 we use 0.11 minutes and on Z15 0.20 minutes for CPU+SRB it means
82% more CPU time consumption!
Anyone have an idea as to why such difference?
I think the z15 had big changes to the zEDC
Renato,
we've not faced this kind of behaviour.
Is it generally visible ?
You can look at SMF30 records and find out where the CPU usage is.
Counter data and zEDC statistics usage sections could help.
Best regards.
Massimo
Hi,
In our shop we are doing a DR procedure by using DFDSS with ZCOMP:
/DUMP001 EXEC PGM=ADRDSSU,REGION=0M,COND=(0,NE)
//SYSPRINT DD SYSOUT=*
//DISCO DD DISP=SHR,UNIT=3390,VOL=SER=xx
//N1 DD DSN=FLD0541.DUMPTEST.xx.ZCOMP,
//DISP=(,CATLG),LABEL=(001,SL),
//
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