System information

CONFIGURING AND ADMINISTERING COLDFUSION 9

Data Source Management

Last updated 2/21/2012

Connecting to JNDI data sources

Use the settings in the following table to connect ColdFusion to JNDI data sources that are defined for a J2EE

application server (multiserver and J2EE configurations only):

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,

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.

connection.

CLOB Select to return the entire contents of any CLOB/ Text columns in the database for this data source. If not

selected, ColdFusion retrieves the number of characters 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

not selected, ColdFusion retrieves the number of characters specified in the BLOB Buffer setting.

LongText Buffer The default buffer size; used if Enable Long Text Retrieval (CLOB) is not selected. The default value is

64000 bytes.

BLOB Buffer 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. Specify the validation query before restarting the database to verify all

connections, but remove the validation query after restarting the database to avoid any performance

loss.

Setting Description

CF Data Source Name The data source name (DSN) that ColdFusion uses to connect to the data source.

JNDI Name The JNDI location in which the J2EE application server stores the data source.

User name The user name that ColdFusion passes to JNDI to connect to JNDI if a ColdFusion application does not

supply a user name (for example, in a

cfquery tag).

Password The password that ColdFusion passes to JNDI to connect to the data source if a ColdFusion application

does not supply a password (for example, in a

cfquery tag).

Setting Description