Connect to DB2 Universal Database

Option

Description

CF Data Source Name

The data source name (DSN) that ColdFusion uses to connect to the data source.

Database

The name of the database.

Server

The name of the server that hosts the database. If the database is local, enclose the word local in parentheses.

Port

The number of the TCP/IP port that the server monitors for connections.

Username

The user name that ColdFusion passes to the JDBC driver to connect to the data source if a ColdFusion application does not supply a user name (for example, in a cfquery tag).

The username must have CREATE PACKAGE privileges for the database, or the database administrator must create a package. Consult the database administrator when configuring this type of data source.

Password

The password that ColdFusion passes to the JDBC driver to connect to the data source if a ColdFusion application does not supply a password (for example, in a cfquery tag).

Description

(Optional) A description for this connection.

Connection String

A field that passes database-specific parameters, such as login credentials, to the data source.

Limit Connections

Select this option to limit the number of data source connections to the value entered in the Restrict Connections To field.

Restrict Connections To

The maximum number of data source connections; used with the Limit Connections option.

Maintain Connections

Select this option to improve performance by caching the data source connection. ColdFusion establishes a connection to a data source for every operation that requires one.

Max Pooled Statements

Select this option to reuse prepared statements (that is, stored procedures and queries that use the cfqueryparam tag). Although you tune this setting based on your application, start by setting it to the sum of the following:

• Unique cfquery tags that use the cfqueryparam tag

• Unique cfstoredproc tags

Timeout (min)

The number of minutes that ColdFusion maintains an unused connection before destroying it.

Interval (min)

The time (in minutes) that the server waits between cycles to check for expired data source connections to close.

Log Activity

Select this option to enable logging of database activity.

Log database calls to

Specify the file and directory on the server in which you want to save database logging information.

Disable Connections

Select this option to suspend all client connections.

Login Timeout (sec)

The number of seconds before ColdFusion times out the data source connection login attempt.

CLOB

Select to return the entire contents of any CLOB/Text columns in the database for this data source. If unselected, ColdFusion retrieves the amount specified in the Long Text Buffer setting.

BLOB

Select to return the entire contents of any BLOB/Image columns in the database for this data source. If unselected, ColdFusion retrieves the amount specified in the Blob Buffer setting.

Long Text Buffer (chr)

The default buffer size, used if the CLOB option is not selected. The default value is 64000 bytes.

Blob Buffer (bytes)

The default buffer size, used if the BLOB option is not selected. The default value is 64000 bytes.

Allowed SQL

The SQL operations that can interact with the current data source.

Validation Query

Called when a connection from the pool is resued. This can slow query response time because an additional query is generated. You should specify this just before restarting the database to verify all connections, but remove the validation query after restarting the database to avoid any performance loss.