Multiple SparkSession Instances can be configured, please consider following Pros and Cons:

Pros: Shares underlying SparkContext, reducing overhead. Isolated configurations and temporary data. Cons: Less isolation than separate SparkContexts. Potential for resource contention if not managed carefully.

Please carefully configure resource requests and limits for each SparkSession to avoid resource contention.Also consider using Kubernetes's scheduling mechanisms to prioritize and allocate resources to different SparkSessions.