Hi Ron and all,
I have captured the strobe report for the full run of the job. I will try to
send it to later. In addition to strobe, i snapped the below statistics of the
job from Mainview. The report shows that the EXCP and the SSCH counts are
almost equal. I am of the understanding that if
Ron,
The job was not profiled for its entire run. All 32M records are read from the
1st file and 80% will qualify from the 2nd file. The job was profiled to
capture 4000 samples in an elapsed time of 3 minutes. As I had mentioned in my
initial post, the job takes nearly 7 minutes of CPU. The pr
Thanks Ron for the CI calculation, I have sent you the strobe report.
Thanks
Arun
--
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Ron,
About 80% of the records qualify from the second file. I tried running the job
with BUFND of 2 for the second file. It increased the EXCPs significantly (from
strobe report) on the data records for the 2nd file and the CPU time went over
the other runs and the elapsed time also increased.
1. Have you looked at adding STRNO on the VSAM definition or using RLS to
provide the records to be instorage?
No, STRNO is not provided explicitly in the VSAM file definition.Strobe
apparently shows the number of Strings is 48. RLS is also not used.
2. In your JCL for the job, have you coded B
DATASET-OWNER-(NULL) CREATION2018.005
RELEASE2 EXPIRATION--.000
SMSDATA
STORAGECLASS -SCTEST MANAGEMENTCLASS---M
Just to be clear. The similar behavior i am referring to is the strobe report
listing QSAM INIT I/O & EXITS and PARTITION COMMUNICATION as the top CPU
contributors.
--
For IBM-MAIN subscribe / signoff / archive access instructi
Apologies. I missed to mention that depending on a record that matches in the
2nd file, there are some random reads that refer back to a previous record as
per the business logic. Hence, the second file has to be VSAM. We also see a
similar behavior with few other programs that do skip sequentia
Hi All,
We are looking to improve the performance of a COBOL program that processes 2
VSAM files. The first file is the I/P file and every record read from the input
VSAM file is searched for a matching record in the other file and a report is
written. The program also applies some business rul
