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SMS · Beginner Joined: 16 Oct 2005 Posts: 53 Topics: 24

Hi,

Please let me know the exact cause of the following problem.

I tried to execute a job which has around 12 steps and most of it are
sort steps. At one step, a temporary dataset (15000 trks) passed from the previous step is getting passed to the subsequent step after getting
processed. At this point of the time, the job ran around 2 hours against
the usual 15 mins. Once I removed all the temporary datasets and
used cataloged datasets the problem is solved. But still other jobs
which uses temp datasets for huge volume runs without any problem.

Using a perofrmanc evalaution tool, when this process was evaluated,

it showed that there is reference to .COBLIB IGZCULE and IGZCXFR modules and there is a reference to Attribution of CPU execution time for I/O Logic Error Handler and I/O Declarative Transfer.

I could not understand what for these modules are (.COBLIB IGZCULE and IGZCXFR ) and the exact cause of this problem.
_________________
Regards,
SMS

Phantom · Posted: Mon Oct 17, 2005 12:54 am Post subject:

SMS,

kolusu · Posted: Mon Oct 17, 2005 4:54 am Post subject:

SMS,

IGZCULE and IGZCXFR are COBOL modules. Are you performing an Internal sort? i.e sort within a cobol program?

Kolusu
_________________
Kolusu
www.linkedin.com/in/kolusu

SMS · Beginner Joined: 16 Oct 2005 Posts: 53 Topics: 24

Hi Kolusu and Phantom,

DATACLAS PARAMETER :
1) Explicitly dataclas parameter is not used. But could you pls let me know how to check whether it is allocated on default ?.

EXTERNAL SORT :
2) I am performing external sort. Actually what happens is, step1 passes a
dataset to step2 after truncating the length to required size, step2 process this temp dataset by adding a keyfield in the existing filler clause after which is passed to another dataset. This is where issue starts.
_________________
Regards,
SMS

kolusu · Posted: Tue Oct 18, 2005 4:42 am Post subject:

SMS · Beginner Joined: 16 Oct 2005 Posts: 53 Topics: 24

Kolusu,

Please find below the extract of that JCL. Actually problem occurs at step8

//STEP6 EXEC PGM=SORT,COND=(4,LT)
//SORTIN DD DSN=X.Y.Z,DISP=SHR
//SORTOUT DD DSN=&&CPXXXXXX,UNIT=SYSDA,
// DISP=(,PASS),
// SPACE=(CYL,(1500,300),RLSE),
// DCB=(RECFM=VB,LRECL=295,BLKSIZE=0)
//SORTWK01 DD UNIT=SYSDA,SPACE=(CYL,(550,350),RLSE)
//SYSPRINT DD SYSOUT=*
//SYSOUT DD SYSOUT=*
//SYSIN DD *
SORT FIELDS=COPY
/*
//STEP7 EXEC PGM=SORT,COND=(4,LT)
//SORTIN DD DSN=&&CPXXXXXX,DISP=(OLD,PASS)
//SORTOUT1 DD DSN=&&CHXXXXXX,DISP=(,PASS),
// UNIT=SYSDA,SPACE=(CYL,(100,50),RLSE)
//SORTOUT2 DD DSN=&&CTXXXXXX,DISP=(,PASS),
// UNIT=SYSDA,SPACE=(CYL,(100,50),RLSE)
//SORTOUT3 DD DSN=&&CDYYYYYY,DISP=(,PASS),
// UNIT=SYSDA,SPACE=(CYL,(2500,500),RLSE)
//SYSPRINT DD SYSOUT=*
//SYSOUT DD SYSOUT=*
//SORTWK DD
//SYSIN DD *
SORT FIELDS=(19,14,CH,A),EQUALS
OUTFIL FNAMES=SORTOUT1,INCLUDE=(5,2,BI,EQ,X'0080')
OUTFIL FNAMES=SORTOUT2,INCLUDE=(5,2,BI,EQ,X'0080')
OUTFIL FNAMES=SORTOUT3,INCLUDE=(11,4,CH,EQ,C'CHFI')
/*
//STEP8 EXEC PGM=APPEND,COND=(4,LT)
//STEPLIB DD DSN=TMS165.JQUERY.LOADLIB,DISP=SHR
//D500522I DD DSN=&&CDYYYYYY,DISP=(OLD,PASS)
//D500522O DD DSN=&&CAZZZZZZDISP=(,PASS),UNIT=SYSDA,
// SPACE=(CYL,(2500,500),RLSE)
_________________
Regards,
SMS

kolusu · Posted: Tue Oct 18, 2005 7:19 am Post subject:

SMS · Beginner Joined: 16 Oct 2005 Posts: 53 Topics: 24

Kolusu,

The external sort I mentioned about is happening in Step7.
But the problem occurs only in Step8. In this step, both the
input and output will have the same file attributes.

Once temporary datasets are replaced with cataloged one, the job runs fine. That 's what I am wondering about since other jobs with temporary datasets of huge volume runs fine.
_________________
Regards,
SMS