ServiceNow Things to Know 10: Maximize Performance with setLimit() Method in ServiceNow Scripting

[PrashantLearnIT]

In ServiceNow, the GlideRecord query is a powerful tool for retrieving data from the database based on specific conditions. When working with large amounts of data, it is important to use the GlideRecord query efficiently to prevent timeouts or memory issues. The default behavior of the GlideRecord query is to retrieve all matching records and store them in memory, which can cause performance problems.

To avoid these issues, you can use the GlideRecord query more efficiently by adding conditions to the query and using the setLimit() method to specify the number of records you want to retrieve at a time. The setLimit() method sets the maximum number of records to retrieve in a single query. This way, the query only retrieves the data you need and reduces the amount of memory and processing power required.

Here's an example of how to use the setLimit() method:

var gr = new GlideRecord("incident");

gr.addQuery("priority", "1");

gr.setLimit(10); // retrieve only 10 records at a time

gr.query();

while (gr.next()) {

  // process each record

}

In conclusion, when working with large amounts of data in ServiceNow, it's crucial to use the GlideRecord query efficiently by adding conditions to the query and using the setLimit() method to specify the number of records you want to retrieve at a time. This can significantly improve the performance of your scripts and prevent timeouts or memory issues.

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Prashant Kumar (LearnIT)

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