System information

CONFIGURING AND ADMINISTERING COLDFUSION 9

Data Source Management

Last updated 2/21/2012

Connecting to Microsoft Access

Use the settings in the following table to connect ColdFusion to Microsoft Access data sources:

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.

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 the CLOB option 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. Configure the validation query just 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) used by ColdFusion to connect to the data source.

Database File The file that contains the database.

System Database File To secure access to the specified database file, click Browse Server to locate and enter a database that contains

database security information. By default, the system database is located in the same directory as the MDB file or

in the windows\system32\system.mdw directory.

Use Default User name If selected, ColdFusion does not pass a user name or password when requesting a connection. The Microsoft

Access driver uses the default user name and password.

ColdFusion User name 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).

ColdFusion 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).

Setting Description