You can ensure your databases are reasonably well-organized
by following a few common practices.
To ensure a well-organized database, take the following
actions when designing your database:
- Provide enough embedded free space at database load or
reorganization time. IMS can
then use this free space to insert new segments near their related
segments (segments in the same database record).
Tip: Choose the amount of free space based on the growth and
performance characteristics of your database. For new databases, use
a value of 25% and increase or decrease this value as needed. It is
a good idea to schedule a reorganization for the database when the
reusable free space is less than 5%.
- Select an appropriate database reorganization frequency.
- Use efficient HDAM and PHDAM randomizing modules and randomizing
parameters.