Help Center/ Elastic Cloud Server/ Service Overview/ ECS Types and Specifications/ x86 ECS Specifications/ Large-Memory ECSs
Updated on 2026-05-14 GMT+08:00
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Large-Memory ECSs

Overview

Large-memory ECSs provide an even larger amount of memory than memory-optimized ECSs. They are used for applications that require a large amount of memory, rapid data exchange and processing, low latency, and capability of processing large volumes of data. Large-memory ECSs provide large memory and high computing, storage, and network performance.

For details about the OSs supported by this type of ECSs, see OSs Supported by Different Types of ECSs.

Available now: E7

Table 1 Large-memory ECS features

Series

Compute

Disk Type

Network

E7
  • vCPU to memory ratio: 1:20
  • Number of vCPUs: 48 to 96
  • Next-generation Intel® Xeon® Scalable Processor
  • Basic/Turbo frequency: 2.6 GHz/3.4 GHz
  • High I/O
  • General Purpose SSD
  • Ultra-high I/O
  • Extreme SSD
  • General Purpose SSD V2
  • Ultra-high packets per second (PPS) throughput
  • An ECS with higher specifications has better network performance.
  • Maximum PPS: 10,000,000
  • Maximum intranet bandwidth: 44 Gbit/s
  • Maximum number of network connections: 10,000,000

Large-Memory E7

Overview

Large-memory E7 ECSs use next-generation Intel® Xeon® Scalable processors to provide powerful and stable compute. By using high-speed intelligent NICs, E7 ECSs offer ultra-high network bandwidth and PPS.

Notes

For notes about using E7 ECSs, see Notes.

Scenarios

  • Online transaction processing (OLTP) and online analytical processing (OLAP) scenarios
  • SAP HANA in-memory databases, such as SAP Business Suite on HANA (SoH), SAP S/4HANA (S4H), SAP Business Warehouse on HANA (BWoH), and SAP BW/4HANA (B4H)
  • High-performance databases
  • Distributed cache
  • Big data processing engines and data mining applications

Specifications

Table 2 E7 ECS specifications

Flavor

vCPUs

Memory

(GiB)

Max./Assured Network Bandwidth

(Gbit/s)

Max. Network PPS

(10,000)

Network Connections

(10,000)

Max. NIC Queues

Max. NICs

Max. Supplementary NICs

Max./Assured EVS Disk Bandwidth (Gbit/s)

Max. EVS Disk IOPS (10,000)

Max. EVS Disks

Virtualization

e7.12xlarge.20

48

960

30/20

550

500

16

8

1,024

10/8

10

60

KVM

e7.24xlarge.20

96

1,920

44/40

1,000

1,000

32

8

2,048

20/16

20

60

KVM

Notes

  • Large-memory ECSs do not support NIC hot swapping.
  • Affected by the memory loading speed, large-memory ECSs may take longer to start.
  • The primary and extension NICs of a large-memory ECS can only be used in the scenarios listed in Table 3.
    Table 3 Application scenarios of the NICs of a large-memory ECS

    NIC Type

    Application Scenario

    Remarks

    Primary NIC

    Vertical layer 3 communication

    N/A

    Extension NIC

    Horizontal layer 2 communication

    To improve network performance, you can set the MTU of an extension NIC to 8888.
  • An ECS can have a maximum of 60 attached disks, including the system disk. For details about constraints, see Can I Attach Multiple Disks to an ECS?

    For example, an E7 ECS can have one system disk and 59 data disks.

Parent topic: x86 ECS Specifications