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1 points•0 comments•1h ago•by rbanffy•arxiv.org ↗

MemExchange: Utility-Driven Distributed Memory Reallocation for Datacenters

MemExchange is a cluster-wide, multi-tenant memory management system that dynamically right-sizes in-memory caching tenants based on workload demand. It reallocates idle memory across physical nodes using a marginal-utility allocation derived from online Miss Ratio Curve estimates and RDMA, avoiding centralized coordination or forced tenant co-location. Implemented in Memcached and evaluated on up to 100 CloudLab servers, it achieved up to 2.3x lower remote-access overhead, a 13% increase in cluster-wide memory utilization, and up to 63% reduction in miss rate for memory-constrained tenants under skewed workloads.

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