EHP Upgrade performance ACT_UPG

Dear Experts,

We installed ECC6 -EHP5 recently in our developement server.We are applying latest EHP5 Patches through SUM Tool. As per our observation ACT_UPG phase is taking long time(more than 16 hours).Before applying we did Kernel Upgarde(720-500 patch) and SPAM Upgrade(50)

As per this note 1674812 we maintained the following parameters in shadow system instance profile.

Parameter                          OLD                                New

abap/heap_area_total            2000000000                 10000000000

abap/heap_area_nondia         900000000                   10000000000

ztta/roll_area                         3000000                       20000000

2)DB statistics  and oracle system statistics are up to date.

3)Upgrade directory(SUM) is in local file system(No NFS File system)

4)Increased the number of dialog work process(14) in shadow instance

Logs are only updating in /tmp directory of SUM.

Please let us know is there any modification is required in the profile parameters of shadow instance or shall we need to add any other parameters for performance of ACT_UPG Phase.

Please suggest.

Thanks & Regards

Maruthi Vutukuri