Configuring Repository Connections FAQS

1. What is the maximum number of concurrent connections allowed in the repository database?
• The maximum number of concurrent connections depends on the database engine and its configuration. In Oracle, the initialization parameter processes limits the number of concurrent connections. You may need to adjust this parameter if you're running multiple parallel executions.
2. Why do I need to manage the number of concurrent connections to the repository?
• Managing concurrent connections is crucial because databases have limits on the number of simultaneous connections they can handle. Exceeding this limit can cause performance issues or even database crashes. Proper management ensures that your environment runs smoothly without hitting connection limits.
3. How many database connections are required for each ODI Studio session?
• Each ODI Studio session requires:
• Two database connections: One to the master repository and one to the work repository.
• A third connection for a brief period during the session's start for a security check.
4. How does the number of Load Plan steps affect database connections?
• For non-Oracle databases, each Load Plan step requires an additional database connection to act as a lock during execution. This connection helps manage and ensure data consistency during the execution process.
5. How do I increase the number of allowed connections in Oracle?
• In Oracle, you can increase the number of allowed connections by adjusting the processes initialization parameter in the database configuration. This will allow the database to handle more concurrent connections, which is essential when running large numbers of parallel executions.
6. What happens if I exceed the connection limit on the database?
• Exceeding the connection limit can lead to performance degradation or errors in your system. The database may refuse additional connections, causing sessions or operations to fail. Properly tuning the database to handle more connections can prevent these issues.
7. How can I check how many connections are currently being used?
• You can monitor the number of active connections through your database’s management tools or SQL queries, depending on the database you’re using. Most databases provide views or logs that track active connections and usage.
8. What should I do if I’m running multiple ODI Studio sessions and Load Plan steps simultaneously?
• If you're running multiple sessions and steps concurrently, you may need to increase the database’s connection limit and carefully manage the number of parallel executions to avoid overloading the database.
9. Are there any recommendations for optimizing repository connection usage?
• To optimize connection usage, consider limiting the number of parallel executions or sessions running at once. You can also optimize Load Plan executions by adjusting the number of steps or running them sequentially when possible.
10. How can I tune my database to handle higher connection demands?
• Apart from increasing the processes parameter (for Oracle), you may need to adjust other database parameters like memory allocation or CPU resources. Consult your database administrator to ensure the system is properly tuned for high-concurrency workloads.
11. Can I limit the number of concurrent connections per user or session?
• Yes, many database management systems allow you to set limits on the number of connections per user or session. You can configure these limits based on your system's needs and ensure no single user or session consumes too many connections.
12. What is the impact of a security check on database connections when starting an ODI Studio session?
• The security check requires a brief third connection when an ODI Studio session starts. While it adds a temporary connection, it ensures that security protocols are validated, and it only lasts for a short period of time.