This will allow the Architect to configure multiple workflow servers and assign the specific workflows to each server by setting the appropriate affinities. This will ensure high availability and reduce the impact of failing workflow by spreading the load across multiple workflow servers.

To set up affinities, you can define them on the workflows and update the wfserver module line in the ni6/configure-.xml file, to specify which workflows should be executed on which servers.

Please note that, you should use the correct format and spelling of the xml file

A composite key is a combination of two or more columns used as a primary key for a table. This can help to reduce the number of joins needed in queries, which can improve performance.

Creating indexes on fields used within joins can also help to improve performance. Indexes are used to quickly locate data without having to scan the entire table. When a join is performed, the database engine can use the indexes to quickly find the matching rows in the tables, which can improve performance.

References:

• Composite keys in database design:https://www.sitepoint.com/composite-keys-database-design/
• Indexing in SQL databases:https://www.postgresql.org/docs/9.1/indexes.html

The Architect should recommend scheduling workflows at different start times to avoid overloading the system with too many workflows running concurrently. This will help to distribute the load and avoid bottlenecks. Additionally, the Architect can recommend restarting the pending workflows to ensure that they are not stuck in a pending state and can continue to execute.