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 that you want to use. 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 user name 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

Specifies whether ColdFusion limits the number of database connections for the data source. If you enable this option, use the Restrict Connections To field to specify the maximum.

Restrict Connections To

Specifies the maximum number of database connections for the data source. To use this restriction, you must enable the Limit Connections option.

Maintain Connections

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

Max Pooled Statements

Enables reuse of 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 MX 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.

Disable Connections

If selected, suspends all client connections.

Login Timeout (sec)

The number of seconds before ColdFusion times out the attempt to log in to the data source connection.

CLOB

Returns the entire contents of any CLOB/Text columns in the database for this data source. If unchecked, ColdFusion retrieves the number of characters specified in the Long Text Buffer setting. For UDB 7.1 and 7.2, there is a 32K limit on CLOBs.

BLOB

Returns the entire contents of any BLOB/Image columns in the database for this data source. If unchecked, ColdFusion retrieves the number of characters specified in the BLOB Buffer setting. BLOBs are not supported on UDB 7.1 and 7.2.

LongText 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.