ecs.c6a.16xlarge by Alibaba Cloud

ecs.c6a.16xlarge is a ecs.c6a family (64 vCPUs, 128 GiB RAM, 0 GB storage) server offered by Alibaba Cloud with 64 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 1.453 USD per hour.
64 vCPU
128 GiB Memory
Spare SCore
24,515
(All-cores)
768
(Single-core)

Specifications

Server Metadata

Vendor ID
alicloud
Name
ecs.c6a.16xlarge
Description
ecs.c6a family (64 vCPUs, 128 GiB RAM, 0 GB storage)
Family
ecs.c6a
Hw Virt
Average Time To Start
13
Status
active
Observed At
2026-10-29T02:39:22.926520

Availability

REGION / IDSPOTONDEMAND
Guangzhou (CN) / cn-guangzhou
- 1.453 USD/h
Shenzhen (CN) / cn-shenzhen
- 1.453 USD/h

Processor

vCPUs
64
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
32
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
1 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
128 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
31.9
Scalability
49.84

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
      16 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A dedicated multi-core compute instance optimized for highly parallelized processing and multi-threaded workloads without local storage.

      Compute OptimizedGeneral Purpose

      Alibaba Cloud ecs.c6a.16xlarge is a compute-optimized virtual server featuring 64 dedicated vCPUs and 128.0 GB of RAM, powered by an AMD EPYC 7H12 processor at 2.6 GHz. Operating on the KVM hypervisor, this instance lacks local storage and GPU accelerators, but provides a 16 Gbps baseline network bandwidth. Benchmark data reveals average to poor single-core performance, contrasted by strong multi-threaded capabilities, with PassMark CPU scores, encryption tests, and bzip3 decompression ranking in the top 25%. This resource profile is highly suited for parallelized, CPU-bound workloads such as software compilation, web serving, and multi-threaded data processing.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.8Score
      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) 4,575,512 ops/sec 1,919,289 ops/sec 2.4 50.00% 50.00% +55.00%
      Redis RPS (pipeline=16, SET) 31,158,909 ops/sec 11,728,058 ops/sec 2.6 20.00% 20.00% +21.00%
      PassMark Memory Mark (composite) 2,683 2,416 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 72,276 MB/sec 108,466 MB/sec 0.65 10.00% 10.00% -4.20%
      PassMark single-thread CPU 2,129 Mops/s 2,365 Mops/s 0.88 10.00% 10.00% -1.30%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,325

      Geekbench Multi-Core

      Score: 12,089

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 52,515
      Compression
      		 944,411
      Encryption
      		 68,035
      Extended Instructions
      		 52,734
      Floating Point Maths
      		 128,524
      Integer Maths
      		 215,107
      Physics
      		 3,300
      Prime Numbers
      		 265
      Single Threaded
      		 2,129
      String Sorting
      		 100,437

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,683
      Database Operations
      		 17,698
      Memory Latency
      		 54
      Memory Read Cached
      		 24,435
      Memory Read Uncached
      		 11,923
      Memory Write
      		 11,267

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 408.79 341.45 0.84×
      bitops
      		 120,779 4,846,831 40.13×
      branch
      		 152,688 8,395,122 54.98×
      funccall
      		 498.8 21,514 43.13×
      funcret
      		 14,705 660,619 44.92×
      hash
      		 130,825 6,572,075 50.24×
      intmath
      		 19,341 677,688 35.04×
      nop
      		 235,704 7,618,216 32.32×
      prime
      		 339,452 14,503,096 42.73×
      rotate
      		 59,646 1,982,478 33.24×
      str
      		 679,284 30,022,224 44.20×
      wcs
      		 489,553 18,562,014 37.92×
      CryptographySingleMultiScaling
      crypt
      		 2,844 98,351 34.59×
      CompressionSingleMultiScaling
      jpeg
      		 624.73 28,075 44.94×
      zlib
      		 59.38 2,941 49.53×
      HypervisorSingleMultiScaling
      clock
      		 15,061 237,941 15.80×
      clone
      		 211.14 5,082 24.07×
      context
      		 3,042 166,062 54.59×
      cpu-sched
      		 62.7 3,966 63.25×
      eventfd
      		 42,650 2,548,059 59.74×
      fault
      		 7,910 177,005 22.38×
      fork
      		 2,697 58,630 21.74×
      getrandom
      		 35,567 1,564,876 44.00×
      hrtimers
      		 122,289 6,258,200 51.18×
      mprotect
      		 486,910 9,457,594 19.42×
      mtx
      		 33,104,554 2,786,789,852 84.18×
      munmap
      		 1,910 60,233 31.54×
      null
      		 373,664 19,290,472 51.63×
      pipe
      		 1,304,339 17,157,185 13.15×
      priv-instr
      		 382,530 15,853,279 41.44×
      resched
      		 6,654,899 5,472,000 0.82×
      switch
      		 128,049 6,034,762 47.13×
      timermix
      		 157,412 8,594,073 54.60×
      tlb-shootdown
      		 11,656 93,005 7.98×
      tsc
      		 653,821 40,412,396 61.81×
      usersyscall
      		 274,611 13,423,846 48.88×
      vdso
      		 62,652,971 2,824,785,781 45.09×
      vfork
      		 17,300 109,017 6.30×
      x86syscall
      		 4,506,404 233,860,665 51.90×
      yield
      		 35,266,761 31,549,700 0.89×
      zero
      		 1,985,378 100,520,346 50.63×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 12,432 468,916 37.72×
      expmath
      		 2,780 139,589 50.22×
      fma
      		 742,761 36,916,008 49.70×
      fp
      		 208.24 9,506 45.65×
      fractal
      		 6.4 320.23 50.04×
      hyperbolic
      		 3,634 174,626 48.06×
      logmath
      		 4,092 191,725 46.86×
      matrix
      		 2,619 154,050 58.82×
      matrix-3d
      		 187.54 2,324 12.39×
      monte-carlo
      		 161.17 8,254 51.21×
      mpfr
      		 1,267 51,532 40.66×
      powmath
      		 1,338 69,107 51.65×
      trig
      		 1,554 76,043 48.95×
      veccmp
      		 17,002 661,895 38.93×
      vecfp
      		 1,386 65,253 47.07×
      vecmath
      		 3,342 173,038 51.77×
      vecshuf
      		 478.66 19,024 39.75×
      vecwide
      		 26,446 977,679 36.97×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 6.8 269.79 39.68×
      bsearch
      		 222.85 9,218 41.37×
      bubblesort
      		 0.8 25.6 32.00×
      fibsearch
      		 262.24 10,735 40.93×
      heapsort
      		 8.6 389.19 45.25×
      hsearch
      		 5,466 222,408 40.69×
      insertionsort
      		 6.6 254.8 38.61×
      malloc
      		 2,361,945 71,869,634 30.43×
      mcontend
      		 83.87 7,619 90.85×
      mergesort
      		 25.8 1,262 48.90×
      qsort
      		 17.4 828.17 47.60×
      skiplist
      		 5,529 280,466 50.73×
      tree
      		 1.8 38.35 21.31×
      MemorySingleMultiScaling
      cache
      		 354,257 680,576 1.92×
      cachehammer
      		 495,426 13,958,019 28.17×
      cacheline
      		 56.96 3,503 61.50×
      l1cache
      		 192.09 6,078 31.64×
      memcpy
      		 355.99 11,977 33.64×
      memrate
      		 1.75 11.49 6.57×
      memthrash
      		 163.38 488.17 2.99×
      ptr-chase
      		 29,667,501 399,957,642 13.48×
      spinmem
      		 132.19 1,874 14.17×
      stream
      		 77.61 18,067 232.80×
      vm
      		 54,044 299,861 5.55×

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYAccelerators
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      ecs.c6a.2xlarge 816 GiB0
      ecs.c6a.4xlarge 1632 GiB0
      ecs.c6a.8xlarge 3264 GiB0
      ecs.c6a.32xlarge 128256 GiB0

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      ecs.c6a.16xlarge FAQs