memory-sizing-for-server-virtualization

We found that memory utilization can vary widely even

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Unformatted text preview: ound that: • Memory utilization can vary widely, even within similar workload categories. • Excluding the upper 25 percent, or top quartile, the servers sampled used an average of 1 GB of memory. Utilization patterns were similar at the other companies. • 2 GB dual in-line memory modules (DIMMs) represented the best tradeoff of capacity, power, and cost. • Dual-socket servers with quad-core processors and 16 GB of memory can support 15 to 20 virtual machines (VMs) for most applications that are virtualization candidates in the near- to mid-term. Our analysis shows the importance of monitoring actual memory use when determining optimum virtualization host memory size. We believe our memory sizing strategy will minimize cost because we avoid paying for unused memory and associated power and cooling.  Memory Sizing for Server Virtualization White Paper Contents Executive Summary . ................................................................................................................................................  Business Challenge. ................................................................................................................................................. 4 Determining Virtualization Host Memory Size . ..................................................................................... 5 Physical Memory Consumption on Existing Servers . ........................................................................... 5 Target Platform . ...................................................................................................................................................... 7 Potential Memory Configurations . ................................................................................................................. 7 Hypervisor Memory Assumptions . ................................................................................................................ 7 Achievable Consolidation Levels. .........................
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