Good application design includes the efficient use of machine resources.
To run in a manner that is acceptable to the end user, an application program
must be efficient in operation, and must run with adequate response time.
SQL performance general considerations
Performance of SQL in
application programs is important to ALL server users, because inefficient
usage of SQL can waste
server resources.
Database design
Use the following topics to determine what tables you require in your database and to understand the relationship between those tables.
Optimizer
Optimizer is an important module of the i5/OS™ Query
component because it makes the key decisions for good database performance.
Its main objective is to find the most efficient access path to the data.