ecs.r8a.2xlarge by Alibaba Cloud

ecs.r8a.2xlarge is a ecs.r8a family (8 vCPUs, 64 GiB RAM, 0 GB storage) server offered by Alibaba Cloud with 8 vCPUs, 64 GiB of memory and 0 GB of storage. The pricing starts at 0.4209 USD per hour.
8 vCPU
64 GiB Memory
Spare SCore
12,304
(All-cores)
3,075
(Single-core)

Specifications

Server Metadata

Vendor ID
alicloud
Name
ecs.r8a.2xlarge
Description
ecs.r8a family (8 vCPUs, 64 GiB RAM, 0 GB storage)
Family
ecs.r8a
Hw Virt
Average Time To Start
11
Status
active
Observed At
2026-10-27T03:17:14.563506

Availability

REGION / IDSPOTONDEMAND
Shenzhen (CN) / cn-shenzhen
- 0.4209 USD/h

Processor

vCPUs
8
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
4
CPU Speed
2.7 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
9T24
CPU L1D Cache
32 KiB
CPU L1D Cache Total
128 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
128 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
4 MiB
CPU L3 Cache
32 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, amd_lbr_v2, nopl, nonstop_tsc, cpuid, extd_apicid, aperfmperf, tsc_known_freq, pni, pclmulqdq, monitor, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, extapic, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, osvw, ibs, topoext, perfctr_core, mwaitx, ssbd, perfmon_v2, ibrs, ibpb, stibp, ibrs_enhanced, vmmcall, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, avx512f, avx512dq, rdseed, adx, smap, avx512ifma, clflushopt, clwb, avx512cd, sha_ni, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, avx512_bf16, clzero, irperf, xsaveerptr, rdpru, wbnoinvd, arat, avx512vbmi, umip, pku, ospke, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, avx512_vpopcntdq, rdpid, fsrm
Ecpus
4
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
64 GiB
Memory Amount Actual
64 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
      4 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      An AMD-powered virtual server offering a high memory-to-vCPU ratio and strong single-core performance for memory-intensive workloads.

      Memory Optimized

      Alibaba Cloud ecs.r8a.2xlarge is a memory-optimized virtual server instance powered by an AMD EPYC 9T24 processor on the x86_64 architecture. It features 8 dedicated vCPUs across 4 physical cores, 64.0 GB of system memory, and a baseline network bandwidth of 4 Gbps, with no local storage or GPU resources. Benchmark data shows strong single-core CPU and text processing capabilities, alongside average multi-core performance and database operation speeds. However, uncached large-block memory read bandwidth is a relative bottleneck. Supported instruction sets include AVX-512 and cryptographic accelerations like AES and SHA_NI. This instance is designed for memory-intensive workloads such as database hosting, caching layers, and text processing applications that require a high memory-to-vCPU ratio.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.5Score
      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) 726,203 ops/sec 1,918,343 ops/sec 0.38 50.00% 50.00% -38.00%
      Redis RPS (pipeline=16, SET) 5,817,262 ops/sec 11,704,734 ops/sec 0.48 20.00% 20.00% -14.00%
      PassMark Memory Mark (composite) 2,516 2,416 1 10.00% 10.00% 0.00%
      Memory bandwidth (read, 16 MB ~ L3) 46,529 MB/sec 108,420 MB/sec 0.43 10.00% 10.00% -8.10%
      PassMark single-thread CPU 2,886 Mops/s 2,365 Mops/s 1.2 10.00% 10.00% +1.80%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,005

      Geekbench Multi-Core

      Score: 7,753

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 14,423
      Compression
      		 157,965
      Encryption
      		 9,623
      Extended Instructions
      		 10,856
      Floating Point Maths
      		 21,243
      Integer Maths
      		 37,969
      Physics
      		 1,490
      Prime Numbers
      		 88
      Single Threaded
      		 2,886
      String Sorting
      		 22,861

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,516
      Database Operations
      		 3,899
      Memory Latency
      		 77
      Memory Read Cached
      		 27,362
      Memory Read Uncached
      		 25,149
      Memory Write
      		 24,921

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 565.66 350.9 0.62×
      bitops
      		 160,323 773,237 4.82×
      branch
      		 212,690 1,523,327 7.16×
      funccall
      		 618.18 3,479 5.63×
      funcret
      		 20,918 122,348 5.85×
      hash
      		 163,254 977,333 5.99×
      intmath
      		 66,792 362,248 5.42×
      nop
      		 627,100 2,542,197 4.05×
      prime
      		 481,680 2,553,190 5.30×
      rotate
      		 88,150 353,044 4.01×
      str
      		 1,076,233 5,390,084 5.01×
      wcs
      		 679,280 3,321,133 4.89×
      CryptographySingleMultiScaling
      crypt
      		 3,736 16,123 4.32×
      CompressionSingleMultiScaling
      jpeg
      		 887.22 4,808 5.42×
      zlib
      		 57.64 412.58 7.16×
      HypervisorSingleMultiScaling
      clock
      		 18,937 109,411 5.78×
      clone
      		 445.94 1,553 3.48×
      context
      		 1,776 10,734 6.04×
      cpu-sched
      		 75.06 531.81 7.09×
      eventfd
      		 72,981 429,052 5.88×
      fault
      		 10,835 66,407 6.13×
      fork
      		 4,844 28,219 5.83×
      getrandom
      		 50,107 265,866 5.31×
      hrtimers
      		 178,404 862,810 4.84×
      mprotect
      		 1,036,055 1,198,848 1.16×
      mtx
      		 41,511,799 536,906,261 12.93×
      munmap
      		 3,331 18,833 5.65×
      null
      		 192,759 1,114,486 5.78×
      pipe
      		 952,012 2,545,086 2.67×
      priv-instr
      		 329,925 2,030,280 6.15×
      resched
      		 1,752,941 894,912 0.51×
      switch
      		 175,331 944,792 5.39×
      timermix
      		 183,437 1,228,927 6.70×
      tlb-shootdown
      		 21,866 40,614 1.86×
      tsc
      		 784,206 6,131,629 7.82×
      usersyscall
      		 238,876 1,462,850 6.12×
      vdso
      		 92,470,313 597,866,639 6.47×
      vfork
      		 41,204 159,070 3.86×
      x86syscall
      		 2,201,691 12,564,384 5.71×
      yield
      		 3,767,068 3,908,542 1.04×
      zero
      		 1,676,882 9,971,456 5.95×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 15,979 70,336 4.40×
      expmath
      		 2,514 16,705 6.65×
      fma
      		 912,144 5,988,673 6.57×
      fp
      		 251.6 1,550 6.16×
      fractal
      		 7.4 50.6 6.84×
      hyperbolic
      		 3,809 22,808 5.99×
      logmath
      		 4,556 26,008 5.71×
      matrix
      		 4,929 23,178 4.70×
      matrix-3d
      		 944.99 2,127 2.25×
      monte-carlo
      		 107.04 603.76 5.64×
      mpfr
      		 1,694 8,691 5.13×
      powmath
      		 1,301 8,505 6.54×
      trig
      		 1,871 11,416 6.10×
      veccmp
      		 18,993 99,153 5.22×
      vecfp
      		 1,812 11,086 6.12×
      vecmath
      		 4,019 26,026 6.48×
      vecshuf
      		 638.2 3,146 4.93×
      vecwide
      		 28,566 152,943 5.35×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 10.4 47.4 4.56×
      bsearch
      		 306.17 1,704 5.57×
      bubblesort
      		 0.8 5.4 6.75×
      fibsearch
      		 379.66 1,842 4.85×
      heapsort
      		 11 60.4 5.49×
      hsearch
      		 11,245 48,676 4.33×
      insertionsort
      		 12.8 50 3.91×
      malloc
      		 3,664,666 23,714,565 6.47×
      mcontend
      		 263.46 1,559 5.92×
      mergesort
      		 33.8 202.79 6.00×
      qsort
      		 21.8 125.8 5.77×
      skiplist
      		 7,009 45,456 6.49×
      tree
      		 2 8 4.00×
      MemorySingleMultiScaling
      cache
      		 860,460 1,841,662 2.14×
      cachehammer
      		 279,461 2,099,438 7.51×
      cacheline
      		 74.85 614.66 8.21×
      l1cache
      		 254.94 1,166 4.57×
      memcpy
      		 446.91 1,835 4.11×
      memrate
      		 3.71 4.63 1.25×
      memthrash
      		 177.77 403.55 2.27×
      ptr-chase
      		 37,744,132 70,307,385 1.86×
      spinmem
      		 286.39 473.33 1.65×
      stream
      		 127.2 1,498 11.77×
      vm
      		 60,868 291,581 4.79×

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      Static Web Server

      Redis

      Alternatives

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      INSTANCEvCPUsMEMORYAccelerators
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      ecs.r8a.12xlarge 48384 GiB0
      ecs.r8a.16xlarge 64512 GiB0
      ecs.r8a.24xlarge 96768 GiB0

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      ecs.r8a.2xlarge FAQs