Modifying connection properties using sqlnet.ora parameters

The sqlnet.ora file includes parameters that configure Oracle Net features on Oracle database servers and clients. Using the parameters in the sqlnet.ora file, you can modify properties for connections in and out of the database.

For more information about why you might set sqlnet.ora parameters, see Configuring profile parameters in the Oracle documentation.

Setting sqlnet.ora parameters

Amazon RDS for Oracle parameter groups include a subset of sqlnet.ora parameters. You set them in the same way that you set other Oracle parameters. The sqlnetora. prefix identifies which parameters are sqlnet.ora parameters. For example, in an Oracle parameter group in Amazon RDS, the default_sdu_size sqlnet.ora parameter is sqlnetora.default_sdu_size.

For information about managing parameter groups and setting parameter values, see Parameter groups for Amazon RDS.

Supported sqlnet.ora parameters

Amazon RDS supports the following sqlnet.ora parameters. Changes to dynamic sqlnet.ora parameters take effect immediately.

Parameter	Valid values	Static/Dynamic	Description
sqlnetora.default_sdu_size	512 to 2097152	Dynamic	The session data unit (SDU) size, in bytes. The SDU is the amount of data that is put in a buffer and sent across the network at one time.
sqlnetora.diag_adr_enabled	ON, OFF	Dynamic	A value that enables or disables Automatic Diagnostic Repository (ADR) tracing. ON specifies that ADR file tracing is used. OFF specifies that non-ADR file tracing is used.
sqlnetora.recv_buf_size	8192 to 268435456	Dynamic	The buffer space limit for receive operations of sessions, supported by the TCP/IP, TCP/IP with SSL, and SDP protocols.
sqlnetora.send_buf_size	8192 to 268435456	Dynamic	The buffer space limit for send operations of sessions, supported by the TCP/IP, TCP/IP with SSL, and SDP protocols.
sqlnetora.sqlnet.allowed_logon_version_client	8, 10, 11, 12	Dynamic	Minimum authentication protocol version allowed for clients, and servers acting as clients, to establish a connection to Oracle DB instances.
sqlnetora.sqlnet.allowed_logon_version_server	8, 9, 10, 11, 12, 12a	Dynamic	Minimum authentication protocol version allowed to establish a connection to Oracle DB instances.
sqlnetora.sqlnet.expire_time	0 to 1440	Dynamic	Time interval, in minutes, to send a check to verify that client-server connections are active.
sqlnetora.sqlnet.inbound_connect_timeout	0 or 10 to 7200	Dynamic	Time, in seconds, for a client to connect with the database server and provide the necessary authentication information.
sqlnetora.sqlnet.outbound_connect_timeout	0 or 10 to 7200	Dynamic	Time, in seconds, for a client to establish an Oracle Net connection to the DB instance.
sqlnetora.sqlnet.recv_timeout	0 or 10 to 7200	Dynamic	Time, in seconds, for a database server to wait for client data after establishing a connection.
sqlnetora.sqlnet.send_timeout	0 or 10 to 7200	Dynamic	Time, in seconds, for a database server to complete a send operation to clients after establishing a connection.
sqlnetora.tcp.connect_timeout	0 or 10 to 7200	Dynamic	Time, in seconds, for a client to establish a TCP connection to the database server.
sqlnetora.trace_level_server	0, 4, 10, 16, OFF, USER, ADMIN, SUPPORT	Dynamic	For non-ADR tracing, turns server tracing on at a specified level or turns it off.

The default value for each supported sqlnet.ora parameter is the Oracle Database default for the release.

Viewing sqlnet.ora parameters

You can view sqlnet.ora parameters and their settings using the AWS Management Console, the AWS CLI, or a SQL client.

Viewing sqlnet.ora parameters using the console

For information about viewing parameters in a parameter group, see Parameter groups for Amazon RDS.

In Oracle parameter groups, the sqlnetora. prefix identifies which parameters are sqlnet.ora parameters.

Viewing sqlnet.ora parameters using the AWS CLI

To view the sqlnet.ora parameters that were configured in an Oracle parameter group, use the AWS CLI describe-db-parameters command.

To view the all of the sqlnet.ora parameters for an Oracle DB instance, call the AWS CLI download-db-log-file-portion command. Specify the DB instance identifier, the log file name, and the type of output.

Example

The following code lists all of the sqlnet.ora parameters for mydbinstance.

For Linux, macOS, or Unix:

aws rds download-db-log-file-portion \
    --db-instance-identifier mydbinstance \
    --log-file-name trace/sqlnet-parameters \
    --output text

For Windows:

aws rds download-db-log-file-portion ^
    --db-instance-identifier mydbinstance ^
    --log-file-name trace/sqlnet-parameters ^
    --output text

Viewing sqlnet.ora parameters using a SQL client

After you connect to the Oracle DB instance in a SQL client, the following query lists the sqlnet.ora parameters.

SELECT * FROM TABLE
   (rdsadmin.rds_file_util.read_text_file(
        p_directory => 'BDUMP',
        p_filename  => 'sqlnet-parameters'));

For information about connecting to an Oracle DB instance in a SQL client, see Connecting to your RDS for Oracle DB instance.