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For instance, if your Jira instance has a heavy automation build running against it, it maybe used in order to prevent your Jira instance activity to be affected by some misconfiguration in your automation server (imagine 50 or 60 parallel calls against Jira).Your server instance has some configuration like the maximum number of HTTP threads or max number of connection to the database, if for some reason some process (e.g automated) produces a very high number of calls triggering Xray calculations, Xray will allow at most a certain number of CPU processes to be used for these calculations

. It's used to avoid resource starvation (CPU and BD) in more intensive CI/CD scenarios due to the triggered coverage calculation.

A high number allows Xray to produce results faster but will eventually use more CPU resources.

It should be beween 1 and max number of CPU threads.

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