Examples described herein relate to circuitry, when operational, configured to: store records of memory accesses to a memory device by at least one requester based on a configuration, wherein the configuration is to specify a duration of memory access capture. In some examples, the at least one requester comprises one or more workloads running on one or more processors. In some examples, the configuration is to specify collection of one or more of: physical address ranges or read or write access type.