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Product : VMware, vSAN [SDS]/7.0 U1, Enterprise
Feature : Memory Capacity, Memory, Storage Support
Content Owner:  Herman Rutten
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Summary
Non-configurable
Details
Each host within a vSAN cluster has a local memory read cache that is 0.4% of the hosts memory, up to 1GB. The read cache optimizes VDI I/O flows for example.