ecs.c8a.4xlarge by Alibaba Cloud

ecs.c8a.4xlarge is a ecs.c8a family (16 vCPUs, 32 GiB RAM, 0 GB storage) server offered by Alibaba Cloud with 16 vCPUs, 32 GiB of memory and 0 GB of storage. The pricing starts at 0.0911 USD per hour.
16 vCPU
32 GiB Memory
Spare SCore
24,601
(All-cores)
3,073
(Single-core)

Specifications

Server Metadata

Vendor ID
alicloud
Name
ecs.c8a.4xlarge
Description
ecs.c8a family (16 vCPUs, 32 GiB RAM, 0 GB storage)
Family
ecs.c8a
Hw Virt
Average Time To Start
12.5
Status
active
Observed At
2026-09-13T19:43:56.343659

Availability

REGION / IDSPOTONDEMAND
Shenzhen (CN) / cn-shenzhen
0.0911 USD/h 0.4795 USD/h

Processor

vCPUs
16
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
16
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
256 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
256 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
8 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, perfctr_llc, 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
8
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
32 GiB
Memory Amount Actual
32 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
      7 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A compute-optimized instance featuring dedicated AMD EPYC cores, strong single-threaded performance, and a balanced two-gigabyte-per-core memory configuration.

      Compute Optimized

      Alibaba Cloud ecs.c8a.4xlarge is an x86_64 compute-optimized instance featuring 16 dedicated vCPUs on an AMD EPYC 9T24 processor running at 2.7 GHz, paired with 32.0 GB of RAM. It lacks local storage and GPUs, relying on a 7 Gbps baseline network bandwidth. Performance benchmarks show strong single-core capabilities, with stress-ng and Geekbench single-core scores in the top 25%, alongside average multi-core and database performance. However, a key tradeoff is its weak uncached large-block read-only memory bandwidth, which falls into the bottom 25%. This instance is suited for compute-bound applications, text processing, and web serving where dedicated CPU resources are required but massive memory-to-CPU ratios or high-throughput uncached memory access are not critical.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.808Score
      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) 1,464,445 ops/sec 1,917,397 ops/sec 0.764 50.00% 50.00% -12.60%
      Redis RPS (pipeline=16, SET) 11,391,809 ops/sec 11,681,410 ops/sec 0.975 20.00% 20.00% -0.51%
      PassMark Memory Mark (composite) 2,522 2,418 1.04 10.00% 10.00% +0.39%
      Memory bandwidth (read, 16 MB ~ L3) 41,000 MB/sec 108,140 MB/sec 0.379 10.00% 10.00% -9.25%
      PassMark single-thread CPU 2,885 Mops/s 2,365 Mops/s 1.22 10.00% 10.00% +2.01%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,000

      Geekbench Multi-Core

      Score: 11,705

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 26406
      Compression
      		 313369
      Encryption
      		 19244
      Extended Instructions
      		 21863
      Floating Point Maths
      		 42481
      Integer Maths
      		 75867
      Physics
      		 2477
      Prime Numbers
      		 126
      Single Threaded
      		 2885
      String Sorting
      		 45289

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2522
      Database Operations
      		 7589
      Memory Latency
      		 76
      Memory Read Cached
      		 27520
      Memory Read Uncached
      		 26024
      Memory Write
      		 25836

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYGPUs
      ecs.c8a.large 24 GiB0
      ecs.c8a.xlarge 48 GiB0
      ecs.c8a.2xlarge 816 GiB0
      ecs.c8a.8xlarge 3264 GiB0
      ecs.c8a.12xlarge 4896 GiB0
      ecs.c8a.16xlarge 64128 GiB0
      ecs.c8a.24xlarge 96192 GiB0

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      ecs.c8a.4xlarge FAQs