Database Configuration & Tuning
Manage database engine parameters
Different parameters for each engine
AWS-provided default configurations
User-created parameter groups
Require database restart to apply
Applied immediately without restart
Can be changed by users
Managed by AWS, not modifiable
Key MySQL configuration options
PostgreSQL tuning parameters
Oracle database parameters
Start with AWS default parameter group
Change values based on requirements
Associate with DB instance
Track parameter modifications
Dynamic parameters applied immediately
Static parameters require restart
Schedule changes during maintenance
Manual restart to apply changes
Buffer pool sizing
Max concurrent connections
Statement execution limits
Query and error logging
Force encrypted connections
Enable database audit trails
Password complexity requirements
Test parameter changes in non-production
Watch metrics after parameter changes
Keep track of parameter modifications
Ensure parameters work with engine version
Cannot modify AWS default parameter groups
Parameter groups tied to engine family
Some changes require database restart