Guidelines on optimization of runtime of EHP4 installation phases

Question

Hi
Our system is SAP ECC 6.0 SP10 without any EHP on HP-UX and Oracle.
Currently we are running EHP4 installation on our sandbox on top of EHP3. We are in preprocessing phase. I observe that a phase MAIN_SHDRUN/ACT_UPG is going on more then 5 hours upto the composing of this message. I can observe activity into the system (SM50).
I was trying to get some information and documentation on optimization of runtime of phases of the EHP4 installation. I tried Installation Guide, and notes attached to the document like SAP Note 1292069 - Add. Info. on upgrading to SAP ERP 6.0 EHP4 SR1 ABAP, but this seems to be not big help for me(or might be I oversee something provided by SAP)
Here my question is, can we have some anchor document or note for optimization of system settings and parameters which will help us to optimize the runtime of different phases of installation. If not for all then at least please suggest for this phase and other for which it is available.
Approx DB Size:      2.8 TB
Best regards
Jaswant

Answer 1

Hi Jaswant,
> Our system is SAP ECC 6.0 SP10 without any EHP on HP-UX and Oracle.
>
> Currently we are running EHP4 installation on our sandbox on top of EHP3. We are in preprocessing phase. I observe that a phase MAIN_SHDRUN/ACT_UPG is going on more then 5 hours upto the composing of this message. I can observe activity into the system (SM50).
MAIN_SHDRUN/ACT_UPG -- This phase is very long phase, It always takes very long time. Since your database size is 2.8 TB so it will take long time. Only thing you need to take care is no error will be there.
>
> Here my question is, can we have some anchor document or note for optimization of system settings and parameters which will help us to optimize the runtime of different phases of installation. If not for all then at least please suggest for this phase and other for which it is available.
>
> Approx DB Size:      2.8 TB
Also as far as optimization of upgrade is concerned it depends on a number of things:
1) How many R3trans processes you have choosen for upgrade ? If more is the number of processes then upgrade will de faster. R3trans processes you can decide on basis of your hardware.
2) You can also optimize memory parameters like in shdow instance Go to SE38 and run rsmemory report -> there you can increase memory parameters to optimize upgrade.
3) You can also change database parameters like db_cache_size etc.  to increase performemnce.
4) you can also check SAP Note 1275873 - Memory bottleneck during DDIC activation during EHP import
5) To optimize performence, SAP always recommends to select Manual Selection of parameters in configuration phase in which you can set parameters according to your hardware.
6) You can also find information to improve performence of upgrade in Troubleshooting and Administration Guide. This guide you can find in <upgrade directory>/EHPI/abap/htdoc
Hope it helps
Thanks
Sunny
Edited by: Sunny Pahuja on Jun 28, 2009 9:59 AM