JVM memory pressure metric changes in Amazon OpenSearch Service

AI Impact Summary

Amazon OpenSearch Service has updated its JVM memory pressure metrics to provide a more accurate representation of memory utilization. Previously, the metrics only considered the old generation memory pool, but now they also include the young generation pool. This change may result in an increase in the JVMMemoryPressure, MasterJVMMemoryPressure, and WarmJVMMemoryPressure metrics, requiring monitoring and potential investigation to understand the impact on OpenSearch domain performance.