AI-assisted review
Instance benchmark

Vultr voc-c-4c-8gb-75s-amd

The complete benchmark report. Every workload, in one place.

4 vCPU7.7 GiB RAMx86_64Silicon Valley, US$80.00 / month
Published report · 17 Oct 2026 · One deployment · 58 min test windowUbuntu 24.04.5 · Region SJC · Method pilot-1

All values below are medians of passed runs unless stated otherwise.

01 /

CPU performance

sysbench 1.0.20 prime workload · 1 thread and all 4 vCPUs.

2,013events/s
Single thread
8,009events/s
All 4 vCPUs
Events / sec
  • 1 thread
    2,013
  • 4 threads
    8,009

Median of 3 passed runs of about 30 seconds per thread count.

gzip fixed corpus · compression input throughput 291.0 MiB/s · single run.

02 /

Memory bandwidth

sysbench 1.0.20 memory · sequential read and write operations.

Read37,671 MiB/s
Write29,682 MiB/s
CopyNot measured
Throughput (MiB/s)
  • Read
    37,671
  • Write
    29,682
  • Copy
    Not measured

Median of 3 passed runs of about 30 seconds per operation. The copy workload is deferred in this methodology.

03 /

Disk performance

fio 3.36 · direct I/O · sequential, random and mixed jobs measured separately.

WorkloadThroughputp95 latency
Sequential read1,856 MB/s46,399 µs
Sequential write4,174 MB/s10,420 µs
Random read266,391 IOPS214.0 µs
Random write352,724 IOPS154.6 µs
Random mix · read190,456 IOPS259.1 µs
Random mix · write81,636 IOPS114.2 µs

Median of 3 passed runs of about 30 seconds per job. The mixed job's reads and writes are listed separately.

04 /

Network performance

Source: Silicon Valley, US · LibreSpeed CLI 1.0.14 · public HTTPS destinations.

DestinationDownloadUploadHTTP latencyHTTP jitterLoss
Frankfurt, Germany (Clouvider)
17/10/2026, 17:55:24 UTC · Separate VM network-only run · View reviewed run
508.0 Mbit/s102.9 Mbit/s140.5 ms0.07 msNot measured
New York, United States (2) (Clouvider)
17/10/2026, 17:55:24 UTC · Separate VM network-only run · View reviewed run
1,187 Mbit/s254.0 Mbit/s66.0 ms1.30 msNot measured

One 10-second download and upload per destination, three concurrent streams, IPv4 over HTTPS, with no configured rate limit. HTTP latency and jitter are application-level measurements; packet loss was not measured. These paths do not establish maximum link capacity.

Latest matching published internet speed test for this provider, plan, recorded region and resource class, taken on a separate VM. These values are not measurements from this full benchmark deployment. The original capped iperf path checks remain under Evidence; their values and test window are unchanged.

Wall-clock reliability was not verified; recorded timestamps should be treated with that limitation.

Browse all network speed tests.

12 GiB outbound-interface abort threshold is sampled; kernel buffering and sampling may overshoot. Retained counters disclose actual observed bytes.

05 /

PostgreSQL performance

PostgreSQL 16.15 · pgbench · in-memory and storage-bound datasets.

Dataset profileTransactions / secAverage latencyPassed runs
In memory10,6890.37 ms3 of 3 passed
Storage-bound8,2140.49 ms3 of 3 passed

Median of 3 passed runs of about 30 seconds per dataset. Latency percentiles were not measured.

Running PostgreSQL yourself? Read our PostgreSQL tutorials.

06 /

Consistency across runs

One deployment · repeated runs inside the recorded test window.

24-hour consistencyNot measured

Workload skipped · No measured score. This report covers a 58 min test window, so no time series exists and none is drawn.

RepetitionCPU 1 threadMemory readRandom readPostgreSQL
12,008 events/s38,270 MiB/s266,391 IOPS9,690 tx/s
22,016 events/s37,622 MiB/s297,138 IOPS10,689 tx/s
32,013 events/s37,671 MiB/s250,013 IOPS12,387 tx/s

Individual runs, not medians. PostgreSQL uses the in-memory dataset. Spread within one test window does not establish long-term consistency.

07 /

Inspect the evidence.

Recorded environment, reviewed measurements and the published snapshot.

OSUbuntu 24.04.5 LTS
Architecturex86_64
Methodpilot-1
Deployments1
Window58 min
report.json

Reviewed, sanitized snapshot: every run, the environment record and all limitations. Raw intake logs remain private.

Read the full methodology

One deployment describes this report, not every server a provider operates.

A 58 min test window does not establish 24-hour consistency or long-term reliability.

AI-assisted review · Codex AI-assisted evidence review (user-delegated) · Reviewed 17 Oct 2026 · Published 17 Oct 2026 · Revision 1

Review and measurement limits
  • Single deployment; not an independent three-instance cohort.
  • No hardware attestation.
  • Pilot memory implements read/write; copy workload deferred.
  • Network endpoints must be supplied by the operator; no public third-party servers are used.
  • Database latency distribution is not available from this pilot parser; average latency only.
  • This profile is not a full implementation of all proposed methodology tests.
  • Resource-constrained environment: CPU workers and RAM reflect affinity/cgroup limits, not host capacity. Private resource-limits evidence retains both; do not merge container/VM or architecture cohorts.
  • Short profile: does not establish 24-hour consistency.
  • This report received AI-assisted evidence review under user-delegated authorization. This is not independent human verification or hardware attestation.
  • This pilot measures its recorded test window. It does not establish 24-hour consistency, long-term reliability or provider-wide performance.
  • Network tests use two controlled London endpoints, one stream, a 100 Mbit/s rate setting and a requested 64 MiB byte target per direction. Reverse-mode polling can exceed that byte target; actual sent and received bytes govern traffic accounting. These results do not measure maximum link capacity.
  • SKU and region were matched to retained deployment records. A missing detected SKU uses the operator-supplied plan and remains labelled supplied. Control-plane records and checksums do not attest the physical host or establish physical-host independence.
  • Package versions and available guard and journal evidence were reviewed. These records do not establish continuous absence of package activity throughout the test window.
  • The pilot includes memory read/write and average PostgreSQL latency. Memory-copy tests and PostgreSQL latency percentiles are not implemented. Skipped consistency and missing measurements are not scores.
  • This first-wave run began before background package controls were tightened. Mitigation and point-in-time package checks are retained, but a prelaunch idle guard and continuous package-activity coverage are unavailable. Effects from unobserved background package activity cannot be ruled out.
Environment and configuration
Recorded fieldValue
ProviderVultr · detected
RegionSilicon Valley, US (SJC) · detected
Planvoc-c-4c-8gb-75s-amd · supplied
List price$80.00 / month · $0.110 / hour. List price on 17 Oct 2026, USD before tax. Source: Vultr plan catalog (API).
CPUAMD EPYC-Turin Processor
Architecturex86_64
Kernel6.8.0-146-generic
Virtualizationmicrosoft
Agent0.2.0 (45388107250ca6e26b216f15a9c17b8d405ec1b7+source.ff98e866b26b3ac76b512554)
Dependenciessysbench: sysbench 1.0.20 · fio: fio-3.36 · iperf3: iperf 3.16 (cJSON 1.7.15) · postgresql: postgres (PostgreSQL) 16.15 (Ubuntu 16.15-0ubuntu0.24.04.1) · pgbench: pgbench (PostgreSQL) 16.15 (Ubuntu 16.15-0ubuntu0.24.04.1) · gzip: gzip 1.12 · apt:sysbench: 1.0.20+ds-6build2 · apt:fio: 3.36-1ubuntu0.1 · apt:iperf3: 3.16-1build2 · apt:postgresql-16: 16.15-0ubuntu0.24.04.1 · apt:postgresql-client-16: 16.15-0ubuntu0.24.04.1 · apt:gzip: 1.12-1ubuntu3.2
Configuration hash5e3d02236dfacc1f903efb3f73808c3d2d21dbadc2992ec63aa342187f5af6c3
Started2026-10-17T11:42:16.728Z
Finished2026-10-17T12:40:34.743Z
Execution statuscompleted
Historical capped network path checks

Original full benchmark deployment · 17 Oct 2026. These controlled iperf path checks used a 100 Mbit/s rate setting and do not measure internet speed or maximum link capacity. RTT is the probe mean; jitter and packet loss were not measured. The original report JSON retains these measurements.

Controlled destinationDownloadUploadRTTJitterLoss
London endpoint 199.9 Mbit/s97.6 Mbit/s131.8 ms——
London endpoint 299.9 Mbit/s97.5 Mbit/s136.2 ms——
Every measured repetition and outcome

CPU performance

Workload / repetitionOutcomeMetricValue
CPU 1 thread(s) · repetition 1passedEvents per second2,008 events/s
CPU 4 thread(s) · repetition 1passedEvents per second8,016 events/s
CPU 1 thread(s) · repetition 2passedEvents per second2,016 events/s
CPU 4 thread(s) · repetition 2passedEvents per second8,009 events/s
CPU 1 thread(s) · repetition 3passedEvents per second2,013 events/s
CPU 4 thread(s) · repetition 3passedEvents per second8,002 events/s
gzip fixed corpus · repetition 1passedCompression input throughput291.0 MiB/s

Memory bandwidth

Workload / repetitionOutcomeMetricValue
Memory read · repetition 1passedBandwidth38,270 MiB/s
Memory write · repetition 1passedBandwidth29,682 MiB/s
Memory read · repetition 2passedBandwidth37,622 MiB/s
Memory write · repetition 2passedBandwidth30,393 MiB/s
Memory read · repetition 3passedBandwidth37,671 MiB/s
Memory write · repetition 3passedBandwidth29,553 MiB/s

Disk performance

Workload / repetitionOutcomeMetricValue
Disk write · repetition 1passedwrite bandwidth4,179 MB/s
Disk write · repetition 1passedwrite operations3,986 IOPS
Disk write · repetition 1passedwrite p50 latency7,700 µs
Disk write · repetition 1passedwrite p95 latency10,289 µs
Disk write · repetition 1passedwrite p99 latency12,517 µs
Disk read · repetition 1passedread bandwidth1,856 MB/s
Disk read · repetition 1passedread operations1,770 IOPS
Disk read · repetition 1passedread p50 latency15,139 µs
Disk read · repetition 1passedread p95 latency46,399 µs
Disk read · repetition 1passedread p99 latency53,740 µs
Disk randwrite · repetition 1passedwrite bandwidth1,476 MB/s
Disk randwrite · repetition 1passedwrite operations360,371 IOPS
Disk randwrite · repetition 1passedwrite p50 latency79.4 µs
Disk randwrite · repetition 1passedwrite p95 latency154.6 µs
Disk randwrite · repetition 1passedwrite p99 latency193.5 µs
Disk randread · repetition 1passedread bandwidth1,091 MB/s
Disk randread · repetition 1passedread operations266,391 IOPS
Disk randread · repetition 1passedread p50 latency106.0 µs
Disk randread · repetition 1passedread p95 latency214.0 µs
Disk randread · repetition 1passedread p99 latency301.1 µs
Disk randrw · repetition 1passedread bandwidth780.1 MB/s
Disk randrw · repetition 1passedread operations190,456 IOPS
Disk randrw · repetition 1passedread p50 latency111.1 µs
Disk randrw · repetition 1passedread p95 latency288.8 µs
Disk randrw · repetition 1passedread p99 latency536.6 µs
Disk randrw · repetition 1passedwrite bandwidth334.4 MB/s
Disk randrw · repetition 1passedwrite operations81,636 IOPS
Disk randrw · repetition 1passedwrite p50 latency63.7 µs
Disk randrw · repetition 1passedwrite p95 latency103.9 µs
Disk randrw · repetition 1passedwrite p99 latency146.4 µs
Disk write · repetition 2passedwrite bandwidth4,174 MB/s
Disk write · repetition 2passedwrite operations3,980 IOPS
Disk write · repetition 2passedwrite p50 latency7,700 µs
Disk write · repetition 2passedwrite p95 latency10,420 µs
Disk write · repetition 2passedwrite p99 latency12,517 µs
Disk read · repetition 2passedread bandwidth10,722 MB/s
Disk read · repetition 2passedread operations10,225 IOPS
Disk read · repetition 2passedread p50 latency2,867 µs
Disk read · repetition 2passedread p95 latency6,783 µs
Disk read · repetition 2passedread p99 latency10,420 µs
Disk randwrite · repetition 2passedwrite bandwidth1,357 MB/s
Disk randwrite · repetition 2passedwrite operations331,220 IOPS
Disk randwrite · repetition 2passedwrite p50 latency86.5 µs
Disk randwrite · repetition 2passedwrite p95 latency162.8 µs
Disk randwrite · repetition 2passedwrite p99 latency193.5 µs
Disk randread · repetition 2passedread bandwidth1,217 MB/s
Disk randread · repetition 2passedread operations297,138 IOPS
Disk randread · repetition 2passedread p50 latency102.9 µs
Disk randread · repetition 2passedread p95 latency146.4 µs
Disk randread · repetition 2passedread p99 latency173.1 µs
Disk randrw · repetition 2passedread bandwidth823.6 MB/s
Disk randrw · repetition 2passedread operations201,072 IOPS
Disk randrw · repetition 2passedread p50 latency106.0 µs
Disk randrw · repetition 2passedread p95 latency259.1 µs
Disk randrw · repetition 2passedread p99 latency473.1 µs
Disk randrw · repetition 2passedwrite bandwidth353.0 MB/s
Disk randrw · repetition 2passedwrite operations86,188 IOPS
Disk randrw · repetition 2passedwrite p50 latency64.3 µs
Disk randrw · repetition 2passedwrite p95 latency114.2 µs
Disk randrw · repetition 2passedwrite p99 latency156.7 µs
Disk write · repetition 3passedwrite bandwidth4,166 MB/s
Disk write · repetition 3passedwrite operations3,973 IOPS
Disk write · repetition 3passedwrite p50 latency7,700 µs
Disk write · repetition 3passedwrite p95 latency10,420 µs
Disk write · repetition 3passedwrite p99 latency12,517 µs
Disk read · repetition 3passedread bandwidth1,393 MB/s
Disk read · repetition 3passedread operations1,328 IOPS
Disk read · repetition 3passedread p50 latency18,219 µs
Disk read · repetition 3passedread p95 latency56,361 µs
Disk read · repetition 3passedread p99 latency66,847 µs
Disk randwrite · repetition 3passedwrite bandwidth1,445 MB/s
Disk randwrite · repetition 3passedwrite operations352,724 IOPS
Disk randwrite · repetition 3passedwrite p50 latency81.4 µs
Disk randwrite · repetition 3passedwrite p95 latency152.6 µs
Disk randwrite · repetition 3passedwrite p99 latency193.5 µs
Disk randread · repetition 3passedread bandwidth1,024 MB/s
Disk randread · repetition 3passedread operations250,013 IOPS
Disk randread · repetition 3passedread p50 latency101.9 µs
Disk randread · repetition 3passedread p95 latency276.5 µs
Disk randread · repetition 3passedread p99 latency399.4 µs
Disk randrw · repetition 3passedread bandwidth765.4 MB/s
Disk randrw · repetition 3passedread operations186,862 IOPS
Disk randrw · repetition 3passedread p50 latency116.2 µs
Disk randrw · repetition 3passedread p95 latency259.1 µs
Disk randrw · repetition 3passedread p99 latency473.1 µs
Disk randrw · repetition 3passedwrite bandwidth328.1 MB/s
Disk randrw · repetition 3passedwrite operations80,103 IOPS
Disk randrw · repetition 3passedwrite p50 latency73.2 µs
Disk randrw · repetition 3passedwrite p95 latency119.3 µs
Disk randrw · repetition 3passedwrite p99 latency164.9 µs

Network performance

Workload / repetitionOutcomeMetricValue
Network upload endpoint 1 · repetition 1passedSender throughput100.2 Mbit/s
Network upload endpoint 1 · repetition 1passedReceiver throughput97.6 Mbit/s
Network download endpoint 1 · repetition 1passedSender throughput100.0 Mbit/s
Network download endpoint 1 · repetition 1passedReceiver throughput99.9 Mbit/s
Latency endpoint 1 · repetition 1passedRound-trip mean131.8 ms
Network upload endpoint 2 · repetition 1passedSender throughput100.2 Mbit/s
Network upload endpoint 2 · repetition 1passedReceiver throughput97.5 Mbit/s
Network download endpoint 2 · repetition 1passedSender throughput100.1 Mbit/s
Network download endpoint 2 · repetition 1passedReceiver throughput99.9 Mbit/s
Latency endpoint 2 · repetition 1passedRound-trip mean136.2 ms

PostgreSQL performance

Workload / repetitionOutcomeMetricValue
PostgreSQL memory dataset · repetition 1passedTransactions9,690 tx/s
PostgreSQL memory dataset · repetition 1passedAverage latency0.41 ms
PostgreSQL memory dataset · repetition 2passedTransactions10,689 tx/s
PostgreSQL memory dataset · repetition 2passedAverage latency0.37 ms
PostgreSQL memory dataset · repetition 3passedTransactions12,387 tx/s
PostgreSQL memory dataset · repetition 3passedAverage latency0.32 ms
PostgreSQL storage dataset · repetition 1passedTransactions8,353 tx/s
PostgreSQL storage dataset · repetition 1passedAverage latency0.48 ms
PostgreSQL storage dataset · repetition 2passedTransactions8,214 tx/s
PostgreSQL storage dataset · repetition 2passedAverage latency0.49 ms
PostgreSQL storage dataset · repetition 3passedTransactions8,012 tx/s
PostgreSQL storage dataset · repetition 3passedAverage latency0.50 ms

Consistency over time

Workload / repetitionOutcomeMetricValue
24-hour consistency · repetition 1skippedNo measured scoreNot measured