Could you please add the propperties of the hana server?
hardware, version, memmory, procesors, etc.
actually, I guess you will not obtain improvements on performance by addin registries, modifying, etc
that is what the transactions do.
The main property on Hana is to use columnar tables, compression, etc. That instance is obtained on BW layer but no by default after migration.
maybe a person who has seen another platform migrated can give more details