Following reports of performance issues within the system, it has been recommended by ServiceNow that we limit the amount of rows people can set when looking at lists. The recommended (and default) number of rows is 20 and the maximum out of the box limit is 100. As part of the implementation, our maximum was adjusted to 500. However, this goes against the best practise recommendations set by ServiceNow. Returning a 500 item list will take at least five times longer than returning the default maximum of 100, which itself can take a few seconds. As lists can be presented within certain forms, this can have a negative performance impact throughout the system.
We are implementing a change that sets the maximum available row count to 75. This is below the recommended maximum in order for us to monitor performance following the change and understand if this makes the improvements ServiceNow expect, or if the performance issues lie in other areas.
Details about how these settings can impact performance and best practise recommendations can be found at the following links:
ServiceNow System Performance Best Practice
ServiceNow Data Display and Performance