Deployment Considerations: Performance
{"Image DocumentName": "Deployment Considerations: Performance", "Image ImageDescription": "Performance depends on characteristics and usage model of the workloads that share the memory pool, memory configuration, and over subscription levels. Switching latency may vary depending on utilization across the shared memory partitions, configured memory, and paging devices. When a large amount of memory is moved, there will be a ramp-up latency at the destination partition. When memory demand increases, the shared memory pool can be increased dynamically to avoid paging and improve performance. Latency has to be monitored to initiate DLPAR memory add to the shared pool. High performance paging devices are required to minimize performance impact. Solid State Devices and FASTt are recommended. Example: Memory Bandwidth Workload. Partition 1 (becoming active) Partition 3 (inactive / app idle) (-1.6GB) (+1.6 GB) Application running full speed. Partition 4 (active) \uf0df application running full speed \uf0e0 Partition 2 (active) \uf0df application running full speed \uf0e0 Elapsed time (Minutes) Partition 2 and 4 workload performance protected. Partition 3 workload idle but, memory not released by application. Partition 1 started, memory removed from partition 3 until performance full speed.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}