Connecting to Autonomous Database with Database Resident Connection Pooling (DRCP)

Connecting to Autonomous Database (ADB ) with Database Resident Connection Pooling (DRCP)

Introduction:

Oracle Autonomous Database (ADB) offers powerful features to simplify database management and optimize performance. One such feature is Database Resident Connection Pooling (DRCP), which provides efficient management of open connections. By leveraging DRCP, you can reduce database resource requirements and scale for simultaneous connections. In this blog post, we will guide you through the process of connecting to Autonomous Database using DRCP and highlight important considerations for working with DRCP.

Connecting with a Pooled DRCP Server Process:

To connect to Autonomous Database using a pooled DRCP server process, follow these steps:

Step 1: Locate the tnsnames.ora File: Locate or obtain the tnsnames.ora file that you are using to connect to your Autonomous Database. This file contains the necessary configuration details for establishing a connection.

Step 2: Modify the tnsnames.ora File: Edit the tnsnames.ora file and add the server type as SERVER=POOLED to enable DRCP for your connection. The modified entry should resemble the following example:

plaintext
example_high = (description= 
     (address=(protocol=tcps)(port=1522)(host=adb.example.oraclecloud.com))
     (connect_data=(service_name=example_high.oraclecloud.com)(SERVER=POOLED))
     (security=(ssl_server_dn_match=yes)))

Ensure that you replace "example_high" with the appropriate service name for your Autonomous Database instance.

Step 3: Download Client Credentials (Wallets): To securely connect to Autonomous Database, you need to download the client credentials (wallets). Refer to Oracle's documentation for instructions on how to obtain the client credentials (wallets) required for authentication.

Step 4: Connect to Autonomous Database: With the modified tnsnames.ora file and the downloaded client credentials (wallets), you can now establish a connection to Autonomous Database using DRCP. Depending on your programming language or framework, use the appropriate connection method and provide the necessary connection details.

Important Considerations for DRCP in Autonomous Database:

1. DRCP Enabled by Default: DRCP is enabled by default in Autonomous Database. However, using DRCP is optional. To connect using a pooled connection, specify SERVER=POOLED in the tnsnames.ora file. If you do not specify SERVER=POOLED, you will connect with a dedicated connection.

2. Connection Pooling Benefits: DRCP enables efficient sharing of server processes among multiple user processes, reducing resource requirements and enabling scalability for simultaneous connections. Leveraging connection pooling can significantly enhance the performance of your applications.

3. DRCP is recommended when there are applications the connects and disconnects after every transaction or you need to startup a application with a huge number of INACTIVE sessions.

Conclusion:

Connecting to Autonomous Database with Database Resident Connection Pooling (DRCP) provides efficient connection management and scalability for simultaneous connections. By modifying the tnsnames.ora file to include SERVER=POOLED and utilizing the client credentials (wallets), you can establish a connection to Autonomous Database using DRCP. With DRCP enabled by default in Autonomous Database, you can leverage connection pooling benefits to optimize the performance of your applications while reducing resource requirements.