ecs.r5.4xlarge by Alibaba Cloud

ecs.r5.4xlarge is a ecs.r5 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 0.1986 USD per hour.
16 vCPU
128 GiB Memory
Spare SCore
11,726
(All-cores)
1,107
(Single-core)

Specifications

Server Metadata

Vendor ID
alicloud
Name
ecs.r5.4xlarge
Description
ecs.r5 family (16 vCPUs, 128 GiB RAM, 0 GB storage)
Family
ecs.r5
Hw Virt
Status
active
Observed At
2026-10-16T13:33:29.210969

Availability

REGION / IDSPOTONDEMAND
Jakarta (ID) / ap-southeast-5
0.1986 USD/h 1.168 USD/h
Beijing (CN) / cn-beijing
- 1.45 USD/h
Shenzhen (CN) / cn-shenzhen
- 1.45 USD/h

Processor

vCPUs
16
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
8
CPU Speed
2.5 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8163
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
33 MiB
CPU L3 Cache Total
33 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, ss, ht, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, xtopology, nonstop_tsc, cpuid, tsc_known_freq, pni, pclmulqdq, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, pti, ibrs, ibpb, stibp, fsgsbase, tsc_adjust, bmi1, hle, avx2, smep, bmi2, erms, invpcid, rtm, mpx, avx512f, avx512dq, rdseed, adx, smap, avx512cd, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, arat
Ecpus
10.6
Scalability
66.25

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-dense virtual server featuring a high RAM-to-vCPU ratio for multi-threaded, memory-bound workloads without local storage requirements.

      Memory OptimizedGeneral Purpose

      Alibaba Cloud ecs.r5.4xlarge is a memory-optimized instance featuring 16 dedicated vCPUs and 128.0 GB of RAM, powered by an Intel Xeon 8163 processor running at 2.5 GHz. Built on the KVM hypervisor, this x86_64 instance offers a high memory-to-vCPU ratio of 8.0 GB per core, though it lacks local storage and GPU accelerators. Performance benchmarks reveal a distinct trade-off: single-core CPU performance and single-threaded compression tasks are weak, positioning in the bottom 10% to 25%, while multi-core execution and memory bandwidth reach average tiers. With a baseline network bandwidth of 5 Gbps, this instance is qualitatively cost-efficient for memory-intensive applications that leverage multi-threading rather than raw single-core speed. It is best suited for database operations, Redis caching, static web serving, and moderate multi-threaded processing.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.58Score
      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) 954,641 ops/sec 1,918,343 ops/sec 0.5 50.00% 50.00% -29.00%
      Redis RPS (pipeline=16, SET) 6,757,819 ops/sec 11,704,734 ops/sec 0.57 20.00% 20.00% -11.00%
      PassMark Memory Mark (composite) 1,780 2,416 0.75 10.00% 10.00% -2.80%
      Memory bandwidth (read, 16 MB ~ L3) 83,476 MB/sec 108,420 MB/sec 0.75 10.00% 10.00% -2.80%
      PassMark single-thread CPU 1,681 Mops/s 2,365 Mops/s 0.71 10.00% 10.00% -3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 928

      Geekbench Multi-Core

      Score: 5,773

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 13,025
      Compression
      		 180,666
      Encryption
      		 5,439
      Extended Instructions
      		 11,872
      Floating Point Maths
      		 21,050
      Integer Maths
      		 39,227
      Physics
      		 1,360
      Prime Numbers
      		 75
      Single Threaded
      		 1,681
      String Sorting
      		 23,743

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 1,780
      Database Operations
      		 4,298
      Memory Latency
      		 80
      Memory Read Cached
      		 19,477
      Memory Read Uncached
      		 6,501
      Memory Write
      		 7,083

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 120.22 127.28 1.06×
      bitops
      		 100,322 880,727 8.78×
      branch
      		 122,176 1,470,912 12.04×
      funccall
      		 450.28 3,796 8.43×
      funcret
      		 9,159 105,707 11.54×
      hash
      		 103,504 1,218,685 11.77×
      intmath
      		 17,990 216,634 12.04×
      nop
      		 151,628 1,044,566 6.89×
      prime
      		 263,381 2,376,164 9.02×
      rotate
      		 76,571 769,490 10.05×
      str
      		 609,624 6,683,249 10.96×
      wcs
      		 402,633 3,671,209 9.12×
      CryptographySingleMultiScaling
      crypt
      		 1,936 15,069 7.78×
      CompressionSingleMultiScaling
      jpeg
      		 475.88 4,732 9.94×
      zlib
      		 44.96 540.74 12.03×
      HypervisorSingleMultiScaling
      clock
      		 8,690 87,577 10.08×
      clone
      		 244.73 2,408 9.84×
      context
      		 563.38 6,554 11.63×
      cpu-sched
      		 67.07 1,023 15.26×
      eventfd
      		 23,706 411,063 17.34×
      fault
      		 8,494 77,058 9.07×
      fork
      		 2,179 20,894 9.59×
      getrandom
      		 32,353 327,879 10.13×
      hrtimers
      		 507,476 1,167,075 2.30×
      mprotect
      		 510,744 993,531 1.95×
      mtx
      		 13,506,382 330,361,275 24.46×
      munmap
      		 1,604 16,452 10.26×
      null
      		 53,085 611,285 11.52×
      pipe
      		 402,095 2,209,914 5.50×
      priv-instr
      		 155,623 1,762,582 11.33×
      resched
      		 1,619,409 641,122 0.40×
      switch
      		 59,206 1,154,240 19.50×
      timermix
      		 113,966 1,307,147 11.47×
      tlb-shootdown
      		 9,348 23,398 2.50×
      tsc
      		 789,135 8,822,372 11.18×
      usersyscall
      		 100,891 1,146,984 11.37×
      vdso
      		 64,227,162 894,230,130 13.92×
      vfork
      		 15,357 106,269 6.92×
      x86syscall
      		 579,678 6,679,926 11.52×
      yield
      		 3,570,025 3,723,431 1.04×
      zero
      		 507,908 5,882,893 11.58×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 12,938 126,563 9.78×
      expmath
      		 2,133 25,982 12.18×
      fma
      		 479,005 6,591,105 13.76×
      fp
      		 132 1,575 11.93×
      fractal
      		 4.2 48.61 11.57×
      hyperbolic
      		 2,230 27,721 12.43×
      logmath
      		 3,610 43,400 12.02×
      matrix
      		 2,471 30,525 12.36×
      matrix-3d
      		 472.16 2,848 6.03×
      monte-carlo
      		 32.01 477.4 14.91×
      mpfr
      		 983.17 8,549 8.70×
      powmath
      		 1,262 15,387 12.20×
      trig
      		 1,365 14,882 10.91×
      veccmp
      		 12,304 96,079 7.81×
      vecfp
      		 1,758 17,388 9.89×
      vecmath
      		 1,678 21,098 12.57×
      vecshuf
      		 743.82 6,389 8.59×
      vecwide
      		 44,963 421,356 9.37×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 5.8 52.8 9.10×
      bsearch
      		 197.32 1,814 9.19×
      bubblesort
      		 0.6 3.2 5.33×
      fibsearch
      		 222.9 2,204 9.89×
      heapsort
      		 6.6 64 9.70×
      hsearch
      		 4,055 39,221 9.67×
      insertionsort
      		 6.4 51.2 8.00×
      malloc
      		 1,474,495 13,516,894 9.17×
      mcontend
      		 69.3 3,279 47.31×
      mergesort
      		 21.2 220.39 10.40×
      qsort
      		 15 146.99 9.80×
      skiplist
      		 4,145 47,066 11.35×
      tree
      		 1 8.39 8.39×
      MemorySingleMultiScaling
      cache
      		 210,452 356,267 1.69×
      cachehammer
      		 356,850 4,713,118 13.21×
      cacheline
      		 19.35 317.12 16.39×
      l1cache
      		 179.28 1,539 8.58×
      memcpy
      		 302.7 2,435 8.04×
      memrate
      		 0.94 8.7 9.26×
      memthrash
      		 107.15 471.39 4.40×
      ptr-chase
      		 10,230,618 117,752,018 11.51×
      spinmem
      		 184.39 538.92 2.92×
      stream
      		 31.63 5,239 165.62×
      vm
      		 16,395 291,747 17.79×

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      LLM Inference Speed for Prompt Processing

      LLM Inference Speed for Text Generation

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYAccelerators
      ecs.r5.large 216 GiB0
      ecs.r5.xlarge 432 GiB0
      ecs.r5.2xlarge 864 GiB0
      ecs.r5.3xlarge 1296 GiB0
      ecs.r5.6xlarge 24192 GiB0
      ecs.r5.8xlarge 32256 GiB0
      ecs.r5.16xlarge 64512 GiB0

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      ecs.r5.4xlarge FAQs