Database-Specific Aspects

In the following, the most important database-specific aspects are described that might have an impact on your overall planning.

Optimizer Statistics

The optimizer statistics values for newly imported tables are updated automatically after the development environment import.

Recommendation

Update the optimizer statistics shortly before and after you update your SAP system.
Database Archiving and Backup
If you want to deactivate transactional logging on database level at the beginning of roadmap step Execution, perform first a full database backup. Afterwards, set the database option trunc log on chkpt to true as follows:
1. Log in on your database server with operating system user syb<sid>.
2. Launch within a command line tool the isql command to connect to ASE database: isql -S<DBSID> -Usapsa -P<password> -X
3. Run the following statements to change the transaction log mode:
  - use master
  - go
  - sp_dboption <SID>, 'trunc log on chkpt' , true
  - go
  - checkpoint
  - go
Recommendation

Before you isolate your system, you have to make a complete data backup of the database (Backup Complete) in operating mode ONLINE. Since it is not possible to estimate how long a complete data backup takes, schedule a generous amount of time between starting the complete data backup and isolating your system. Shortly before you isolate the system, make an additional incremental data backup (Backup Incremental).
After you have isolated the primary application server instance, make a log backup (Backup Log).
Support Package Handling During the Enhancement Package Installation

An enhancement package requires a specific Support Package stack level in the system that you want to update. If the system is on a lower Support Package stack level, all required Support Package stacks are applied to the system in a single step, together with the enhancement package installation. When you download the enhancement package using the Maintenance Planner, the required Support Package stacks are automatically calculated and downloaded. The Software Update Manager installs these Support Package stacks as part of the enhancement package installation procedure.