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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
24515
(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
2026-08-10T02:09:33.671463

Availability

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

Processor

vCPUs
64
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
64
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
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
      16 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A compute-optimized instance featuring sixty-four dedicated AMD EPYC cores, delivering strong multi-threaded performance and high-density parallel processing.

      Compute OptimizedGeneral Purpose

      Alibaba Cloud ecs.c6a.16xlarge is a compute-optimized instance featuring 64 dedicated physical cores powered by an AMD EPYC 7H12 processor at 2.6 GHz. Built on x86_64 architecture and the KVM hypervisor, it provides 128.0 GB of RAM, resulting in a 2.0 GB per core ratio. The instance lacks local storage and GPU accelerators, but offers a 16 Gbps baseline network bandwidth. Benchmark data highlights a performance tradeoff: single-core CPU performance and single-threaded compression are weak, whereas multi-threaded operations, such as bzip3 decompression and Passmark CPU encryption, rank in the top 25 percent. Memory bandwidth, database operations, and static web serving throughput perform at average levels. This profile makes the instance highly efficient for parallelized workloads, cryptography, and multi-threaded batch processing, rather than single-threaded applications.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.81Score
      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 1,910,660 ops/sec 2.39 50.00% 50.00% +54.60%
      Redis RPS (pipeline=16, SET) 31,158,909 ops/sec 11,608,287 ops/sec 2.68 20.00% 20.00% +21.80%
      PassMark Memory Mark (composite) 2,683 2,416 1.11 10.00% 10.00% +1.05%
      Memory bandwidth (read, 16 MB ~ L3) 72,276 MB/sec 107,896 MB/sec 0.67 10.00% 10.00% -3.93%
      PassMark single-thread CPU 2,129 Mops/s 2,364 Mops/s 0.9 10.00% 10.00% -1.05%

      Memory Bandwidth

      Compression

      OpenSSL

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 52515
      Compression
      		 944411
      Encryption
      		 68035
      Extended Instructions
      		 52734
      Floating Point Maths
      		 128524
      Integer Maths
      		 215107
      Physics
      		 3300
      Prime Numbers
      		 265
      Single Threaded
      		 2129
      String Sorting
      		 100437

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2683
      Database Operations
      		 17698
      Memory Latency
      		 54
      Memory Read Cached
      		 24435
      Memory Read Uncached
      		 11923
      Memory Write
      		 11267

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYGPUs
      ecs.c6a.large 24 GiB0
      ecs.c6a.xlarge 48 GiB0
      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