Overview

Memory-optimized DeHs are designed for processing large-scale data sets in the memory. They use the latest Intel Xeon Skylake CPUs, network acceleration engines, and Data Plane Development Kit (DPDK) to provide higher network performance, providing a maximum of 512 GB DDR4 memory for high-memory computing applications.

Memory-optimized DeHs are classified into m3 and m4 DeHs.

M3 ECSs can be deployed on m3 DeHs.
M4 ECSs can be deployed on m4 DeHs.

DeH Specifications

**Table 1** Specifications of m3 DeHs
Flavor Type	Number of Sockets	Number of Cores per Socket	Hardware Specifications	Number of vCPUs
m3	2	18	CPU: Intel® Xeon® Processor Gold 6151 (24.75M L3 Cache, 3.0 GHz) Memory: 512 GB (or 524,288 MB)	60

**Table 2** Specifications of m4 DeHs
Flavor Type	Number of Sockets	Number of Cores per Socket	Hardware Specifications	Number of vCPUs
m4	2	22	CPU: Intel Cascade Lake 6266 (frequency: 3.00 GHz; Turbo frequency: 3.40 GHz) Memory: 608 GB (or 622,592 MB)	76

Number of vCPUs = (Number of sockets x Number of cores x Number of single-core threads - CPU overheads) x CPU overcommitment ratio

m3 DeHs
vCPUs = (2 x 18 x 2 - 12) x 1 = 60

m4 DeHs
vCPUs = (2 x 22 x 2 - 14) x 1 = 74

ECSs Allowed on DeHs

**Table 3** ECS flavors allowed on m3 DeHs
Flavor Name	vCPUs	Memory (RAM in GB)
m3.large.8	2	16
m3.xlarge.8	4	32
m3.2xlarge.8	8	64
m3.4xlarge.8	16	128
m3.8xlarge.8	32	256
m3.15xlarge.8	60	512

**Table 4** ECS flavors allowed on m4 DeHs
Flavor Name	vCPUs	Memory (RAM in GB)
m4.large.8	2	16
m4.xlarge.8	4	32
m4.2xlarge.8	8	64
m4.3xlarge.8	12	96
m4.4xlarge.8	16	128
m4.6xlarge.8	24	192
m4.8xlarge.8	32	256
m4.16xlarge.8	64	512

Memory-Optimized DeHs

Overview

DeH Specifications

ECSs Allowed on DeHs