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
6,113
(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
2026-10-28T23:18:20.650914

Availability

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

Processor

vCPUs
16
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
8
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
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    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 x86_64 virtual server featuring 128 GB of RAM and 16 dedicated vCPUs for memory-intensive enterprise workloads.

      Memory OptimizedGeneral Purpose

      Alibaba Cloud ecs.r6a.4xlarge is a memory-optimized instance featuring 16 dedicated vCPUs and 128.0 GB of RAM, powered by an AMD EPYC 7H12 processor on the x86_64 architecture. It operates with 8 physical cores and 2 threads per core, providing 8.0 GB of memory per core. The instance lacks local storage and GPU accelerators, relying on a 5 Gbps baseline network bandwidth. Benchmark results show average multi-core CPU and cached memory read performance, though single-core CPU performance and uncached large-block memory bandwidth are relatively weak. This hardware profile makes the instance qualitatively cost-efficient for memory-heavy workloads that do not require high single-threaded compute power. It is best suited for in-memory databases, caching layers, and memory-intensive enterprise applications.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.64Score
      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 1,919,289 ops/sec 0.63 50.00% 50.00% -21.00%
      Redis RPS (pipeline=16, SET) 8,026,767 ops/sec 11,728,058 ops/sec 0.67 20.00% 20.00% -7.70%
      PassMark Memory Mark (composite) 2,580 2,416 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 30,707 MB/sec 108,466 MB/sec 0.28 10.00% 10.00% -12.00%
      PassMark single-thread CPU 2,132 Mops/s 2,365 Mops/s 0.88 10.00% 10.00% -1.30%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,317

      Geekbench Multi-Core

      Score: 7,366

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 19,092
      Compression
      		 243,549
      Encryption
      		 17,039
      Extended Instructions
      		 14,853
      Floating Point Maths
      		 32,229
      Integer Maths
      		 53,922
      Physics
      		 1,364
      Prime Numbers
      		 73
      Single Threaded
      		 2,132
      String Sorting
      		 30,721

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,580
      Database Operations
      		 5,028
      Memory Latency
      		 49
      Memory Read Cached
      		 24,281
      Memory Read Uncached
      		 11,634
      Memory Write
      		 11,053

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 282.27 346.23 1.23×
      bitops
      		 120,365 1,213,160 10.08×
      branch
      		 151,983 2,144,902 14.11×
      funccall
      		 496.83 5,297 10.66×
      funcret
      		 14,716 164,769 11.20×
      hash
      		 129,889 1,636,613 12.60×
      intmath
      		 19,445 169,728 8.73×
      nop
      		 233,097 1,902,998 8.16×
      prime
      		 341,384 3,513,701 10.29×
      rotate
      		 59,494 495,020 8.32×
      str
      		 666,493 7,458,995 11.19×
      wcs
      		 512,612 4,492,755 8.76×
      CryptographySingleMultiScaling
      crypt
      		 2,841 24,227 8.53×
      CompressionSingleMultiScaling
      jpeg
      		 598.45 6,837 11.42×
      zlib
      		 40.87 739.5 18.09×
      HypervisorSingleMultiScaling
      clock
      		 18,486 170,356 9.22×
      clone
      		 239.31 1,797 7.51×
      context
      		 2,954 40,625 13.75×
      cpu-sched
      		 60.12 1,004 16.69×
      eventfd
      		 47,819 674,309 14.10×
      fault
      		 7,808 81,043 10.38×
      fork
      		 2,993 31,719 10.60×
      getrandom
      		 35,888 359,860 10.03×
      hrtimers
      		 134,525 1,386,075 10.30×
      mprotect
      		 637,910 2,438,195 3.82×
      mtx
      		 38,018,799 683,892,587 17.99×
      munmap
      		 2,095 23,571 11.25×
      null
      		 372,361 4,773,995 12.82×
      pipe
      		 1,358,663 5,269,306 3.88×
      priv-instr
      		 383,939 4,951,737 12.90×
      resched
      		 3,999,100 1,497,606 0.37×
      switch
      		 101,768 1,525,622 14.99×
      timermix
      		 142,816 2,036,964 14.26×
      tlb-shootdown
      		 12,273 44,382 3.62×
      tsc
      		 653,187 10,014,170 15.33×
      usersyscall
      		 275,700 3,596,569 13.05×
      vdso
      		 62,367,033 707,829,628 11.35×
      vfork
      		 19,718 125,336 6.36×
      x86syscall
      		 4,498,856 57,962,442 12.88×
      yield
      		 7,241,235 8,046,572 1.11×
      zero
      		 1,979,815 24,999,311 12.63×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 12,385 117,726 9.51×
      expmath
      		 2,773 34,884 12.58×
      fma
      		 727,021 9,141,976 12.57×
      fp
      		 207.75 2,502 12.04×
      fractal
      		 6.4 77.01 12.03×
      hyperbolic
      		 3,634 43,491 11.97×
      logmath
      		 4,092 47,630 11.64×
      matrix
      		 2,661 37,701 14.17×
      matrix-3d
      		 125.01 975.7 7.80×
      monte-carlo
      		 161.25 2,065 12.81×
      mpfr
      		 1,264 12,409 9.82×
      powmath
      		 1,338 17,267 12.90×
      trig
      		 1,550 18,857 12.16×
      veccmp
      		 16,999 160,533 9.44×
      vecfp
      		 1,376 16,919 12.29×
      vecmath
      		 3,349 42,435 12.67×
      vecshuf
      		 475.4 4,619 9.72×
      vecwide
      		 26,473 249,547 9.43×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 6.8 67.4 9.91×
      bsearch
      		 223.87 2,199 9.82×
      bubblesort
      		 0.8 6.4 8.00×
      fibsearch
      		 264.31 2,715 10.27×
      heapsort
      		 8.6 96.4 11.21×
      hsearch
      		 5,446 53,705 9.86×
      insertionsort
      		 6.6 60.4 9.15×
      malloc
      		 2,325,372 26,802,439 11.53×
      mcontend
      		 117.67 2,068 17.57×
      mergesort
      		 26 312.8 12.03×
      qsort
      		 16.8 204.99 12.20×
      skiplist
      		 5,550 70,794 12.76×
      tree
      		 1.6 9.6 6.00×
      MemorySingleMultiScaling
      cache
      		 456,203 904,761 1.98×
      cachehammer
      		 503,812 5,880,328 11.67×
      cacheline
      		 52.56 836.45 15.91×
      l1cache
      		 193.32 1,538 7.96×
      memcpy
      		 355.81 2,995 8.42×
      memrate
      		 1.75 3.02 1.73×
      memthrash
      		 137.68 281.84 2.05×
      ptr-chase
      		 28,038,945 112,348,165 4.01×
      spinmem
      		 127.99 450.75 3.52×
      stream
      		 149.73 4,021 26.85×
      vm
      		 55,103 292,627 5.31×

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYAccelerators
      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