system/config/database.php

default

Database connection settings, defined as arrays, or "groups". If no group name is used when loading the database library, the group named "default" will be used.

Each group can be connected to independantly, and multiple groups can be connected at once.

Group Options:

benchmark
Enable or disable database benchmarking
persistent
Enable or disable a persistent connection
connection
DSN identifier: driver://user:password@server/database
character_set
Database character set
table_prefix
Database table prefix
object
Enable or disable object results
cache
Enable or disable query caching

Default value: array