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SAP OS Migration form AIX to RHEL with same database oracle 11.2.0.4.0

May 30, 2017 at 04:17 AM

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Former Member

Hello Experts,

we are planning to migrate our OS AIX 6.1 to RHEL, while executing test migration ,SAP system copy Target system in import phase of ABAP Import Jobs are running very very Slow,out of 153 jobs only 1 job is completed in the past 12 hrs. CPU utilization is only about 20- 30 %

info

db size 753 GB

Memory 50 GB

no of parallel processes 8

ECC 6.0 with EHP 6

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3 Answers

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Former Member May 30, 2017 at 06:40 AM
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Dear Rafique,

do you run export and import in parallel?

Did you use package and table splitting?

Which database is in use?

Did you consider SAP Note 1875778 (Performance Optimization for System Copy Procedures)?


Best regards,
Andreas

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Former Member May 31, 2017 at 04:54 AM
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Hello Andreas

i have not selected parallel run of export & import ,i have taken the export of quality system which was very recently got refreshed with production system with oracle database size 750 GB.

i have not used package and table splitting either due to the size of the database (750 GB)

oracle database version = 11.2.0.4.0

source OS AIX and target is RHEL

Note: SAP System copy import step check and create table space was taken approximately 5 hrs 40 mins.

attaching some screen paint document and log files

Regards

Rafique


trg.txt (2.3 kB)
acctitlog.txt (2.3 kB)
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Former Member May 31, 2017 at 07:56 AM
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Dear Rafique,

I would recommend to start an optimization in order to speed up the export/import. Do you need some further advice about this (in addition to note 1875778)?



You can check the runtimes of your export/import using the Time Analyzer tool. Further information are provided here: https://blogs.sap.com/2016/11/17/time-analyzer-reports-for-osdb-migrations/



On additional remark: If you run export and import in parallel (easy to set up using SWPM) then you can setup the import side in parallel. So you can safe a lot of time. While the export is running the import side will be created. There is no manual activity. This is all handled by SWPM automatically.




Cheers,

Andreas

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