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ecs.r6a.4xlarge by Alibaba Cloud

ecs.r6a.4xlarge is a ecs.r6a family (16 vCPUs, 128 GiB RAM, 0 GB storage) server offered by Alibaba Cloud with 16 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.738 USD per hour.
16 vCPU
128 GiB Memory
Spare SCore
6113
(All-cores)
763
(Single-core)

Specifications

Server Metadata

Vendor ID
alicloud
Name
ecs.r6a.4xlarge
Description
ecs.r6a family (16 vCPUs, 128 GiB RAM, 0 GB storage)
Family
ecs.r6a
Hw Virt
Average Time To Start
14.5
Status
active
Observed At
2026-07-30T12:03:08.382305

Availability

REGION / IDSPOTONDEMAND
Beijing (CN) / cn-beijing
- 0.738 USD/h
Hangzhou (CN) / cn-hangzhou
- 0.738 USD/h
Shanghai (CN) / cn-shanghai
- 0.738 USD/h
Shenzhen (CN) / cn-shenzhen
- 0.738 USD/h

Processor

vCPUs
16
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
16
CPU Speed
2.6 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7H12
CPU L1D Cache
32 KiB
CPU L1D Cache Total
256 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
256 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
4 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
32 MiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, ht, syscall, nx, mmxext, fxsr_opt, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, nonstop_tsc, cpuid, extd_apicid, tsc_known_freq, pni, pclmulqdq, monitor, ssse3, fma, cx16, sse4_1, sse4_2, x2apic, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, osvw, topoext, perfctr_core, ssbd, ibpb, stibp, vmmcall, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, rdseed, adx, smap, sha_ni, xsaveopt, xsavec, xgetbv1, arat
Ecpus
8
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 GiB
GPU
GPU Count
0
GPU Memory Min
0 MiB
GPU Memory Total
0 MiB
GPUs
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Network Speed Baseline
      5 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A memory-optimized virtual server featuring dedicated AMD EPYC cores and a high memory-to-vCPU ratio for database and caching workloads.

      Memory OptimizedGeneral Purpose

      Alibaba Cloud ecs.r6a.4xlarge is a memory-optimized instance featuring 16 dedicated physical cores on an AMD EPYC 7H12 x86_64 processor running at 2.6 GHz. It is configured with 128.0 GB of RAM, yielding a high memory-to-vCPU ratio of 8.0 GB per core, with no local storage or GPU accelerators. Operating on the KVM hypervisor, the instance delivers a baseline network bandwidth of 5 Gbps. Benchmark data indicates average multi-core CPU performance and average cached memory bandwidth, though single-core performance and uncached large-block memory throughput are relatively weak. Qualitatively, the instance provides a cost-effective allocation of high-density memory for workloads that do not require extreme single-threaded compute. It is best suited for memory-intensive applications, including Redis caching, database operations, and multi-threaded web serving.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.643Score
      Precomputed compound score for Cache Intensive workloads. A weighted average (geometric mean) of benchmark scores compared to their medians: score = ∏ (x_i / m_i)^(w_i / Σw). The score of 1.0 represents a synthetic baseline server with the median performance of each component benchmark; 0.5 means roughly half the performance; and 2.0 means twice the performance of that reference profile. Component weights: 50% Redis RPS (pipeline=1, SET), 20% Redis RPS (pipeline=16, SET), 10% PassMark Memory Mark (composite), 10% Memory bandwidth (read, 16 MB ~ L3), 10% PassMark single-thread CPU. Rationale for component selection: In-memory key-value store workload, mixing direct Redis performance metrics with memory speed and latency benchmarks, and single-core CPU performance profiles.
      Component Score Weight Impact
      Raw Reference Normalized Target Actual
      Redis RPS (pipeline=1, SET) 1,173,137 ops/sec 1,896,415 ops/sec 0.619 50.00% 50.00% -21.30%
      Redis RPS (pipeline=16, SET) 8,026,767 ops/sec 11,539,523 ops/sec 0.696 20.00% 20.00% -6.99%
      PassMark Memory Mark (composite) 2,580 2,411 1.07 10.00% 10.00% +0.68%
      Memory bandwidth (read, 16 MB ~ L3) 30,707 MB/sec 107,368 MB/sec 0.286 10.00% 10.00% -11.80%
      PassMark single-thread CPU 2,132 Mops/s 2,363 Mops/s 0.902 10.00% 10.00% -1.03%

      Memory Bandwidth

      Compression

      OpenSSL

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 19092
      Compression
      		 243549
      Encryption
      		 17039
      Extended Instructions
      		 14853
      Floating Point Maths
      		 32229
      Integer Maths
      		 53922
      Physics
      		 1364
      Prime Numbers
      		 73
      Single Threaded
      		 2132
      String Sorting
      		 30721

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2580
      Database Operations
      		 5028
      Memory Latency
      		 49
      Memory Read Cached
      		 24281
      Memory Read Uncached
      		 11634
      Memory Write
      		 11053

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYGPUs
      ecs.r6a.large 216 GiB0
      ecs.r6a.xlarge 432 GiB0
      ecs.r6a.2xlarge 864 GiB0
      ecs.r6a.8xlarge 32256 GiB0
      ecs.r6a.16xlarge 64512 GiB0

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      ecs.r6a.4xlarge FAQs