EHP6 Upgrade comes to still for every 20 minutes.
We are in process of applying EHP6 for our ECC6.0 system (Win2008R2 Server and Oracle 11.g).
The upgrade is currently in the Downtime phase MAIN_NEWBAS/TABIM_UPG and is running for past 4 hours. Its not about this phase, what i have noticed from the Configuration phase is, the SUM process runs for 20 min. taking CPU to 100% and then it comes down to 1% or 5%. The log files are not getting updated and there is no mention of error in any files that were last updated. Also the tmp folder does not get updated anymore, the first 20 minutes there will be full of action in these folders (../abap/log, ../abap/tmp) and later not anymore. It just stays still without doing anything.
I wait for 2 hours each time and then i manually stop the upgrade and again start the upgrade process. Like this, it is happening frequently.
What is the solution for this behaviour?