AI-assisted review
Instance benchmark

Vultr
vc2-4c-8gb

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

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4 vCPU7.7 GiB RAMSJCx86_64
Tested 17 Oct 2026 · One deployment · pilot profileUbuntu 24.04.5 LTS · Methodology pilot-1

Within-run medians of passed repetitions. Some workloads are incomplete. One recorded test window; limitations and review details below.

01 /

CPU performance

sysbench prime workload · recorded thread counts.

416.23events/s
1 threads
1,644.19events/s
4 threads
Events / sec
  • 1 threads
    416.23
  • 4 threads
    1,644.19

Within-run medians; thread counts retain their recorded allocation.

Compression · 178.038 MiB/s · passed

02 /

Memory bandwidth

Sequential read and write · recorded sysbench workload.

Read6,557.04 MiB/s
Write6,731.93 MiB/s
Throughput (MiB/s)
  • Read
    6,557.04
  • Write
    6,731.93

Memory copy was not measured.

03 /

Disk performance

fio · direct I/O · recorded sequential and random workloads.

WorkloadRead bandwidthWrite bandwidthRead IOPSWrite IOPSRead p95Write p95
writeNot measured497.101 MB/sNot measured474.073 IOPSNot measured79,167.488 us
read516.667 MB/sNot measured492.732 IOPSNot measured71,827.456 usNot measured
randwriteNot measured291.704 MB/sNot measured71,216.893 IOPSNot measured692.224 us
randread257.534 MB/sNot measured62,874.571 IOPSNot measured880.64 usNot measured
randrw164.495 MB/s70.518 MB/s40,159.895 IOPS17,216.426 IOPS1,204.224 us1,044.48 us

Read, write and mixed workloads are recorded separately. These are medians of measured repetitions.

04 /

Network performance

Source: SJC · controlled London endpoints.

DestinationDownload (receiver)Upload (receiver)Round-trip mean
London endpoint 199.946 Mbit/s97.467 Mbit/s136.484 ms
London endpoint 299.943 Mbit/s97.464 Mbit/s136.435 ms

100 Mbit/s rate setting · requested 64 MiB per direction; actual bytes can exceed the target. These routes do not measure maximum link capacity. Jitter and packet-loss scores are not inferred.

05 /

PostgreSQL performance

pgbench · recorded memory and storage dataset profiles.

Dataset profileTransactions / secAverage latency
memory2,660.958 transactions/s1.501 ms
storage2,076.571 transactions/s1.923 ms

Within-run medians. PostgreSQL latency percentiles were not measured.

06 /

Consistency over time

Recorded outcomes only; no synthetic time-series.

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

This pilot does not establish 24-hour consistency or long-term reliability.

07 /

Inspect the evidence.

Recorded environment, reviewed measurements, and versioned source.

OSUbuntu 24.04.5 LTS
Architecturex86_64
Methodpilot-1
Deployments1
Window2698 seconds
report.json
Read the full methodology

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
RegionSJC · detected
Planvc2-4c-8gb · supplied
CPUIntel Xeon Processor (Skylake, IBRS)
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 hash8b66604f20ca195b8e22af7875db999d934adfee73f97e55d0cc7841e8c41d83
Started2026-10-17T11:42:30.714Z
Finished2026-10-17T12:27:28.852Z
Execution statuscompleted
Every measured repetition and outcome

CPU performance

Workload / repetitionOutcomeMetricValue
CPU 1 thread(s) · repetition 1passedEvents per second408.68 events/s
CPU 4 thread(s) · repetition 1passedEvents per second1,640.97 events/s
CPU 1 thread(s) · repetition 2passedEvents per second416.23 events/s
CPU 4 thread(s) · repetition 2passedEvents per second1,653.21 events/s
CPU 1 thread(s) · repetition 3passedEvents per second418.75 events/s
CPU 4 thread(s) · repetition 3passedEvents per second1,644.19 events/s
gzip fixed corpus · repetition 1passedCompression input throughput178.038 MiB/s

Memory bandwidth

Workload / repetitionOutcomeMetricValue
Memory read · repetition 1passedBandwidth6,607.87 MiB/s
Memory write · repetition 1passedBandwidth6,699.28 MiB/s
Memory read · repetition 2passedBandwidth6,556.68 MiB/s
Memory write · repetition 2passedBandwidth6,731.93 MiB/s
Memory read · repetition 3passedBandwidth6,557.04 MiB/s
Memory write · repetition 3passedBandwidth6,789.77 MiB/s

Disk performance

Workload / repetitionOutcomeMetricValue
Disk write · repetition 1passedwrite bandwidth492.994 MB/s
Disk write · repetition 1passedwrite operations470.156 IOPS
Disk write · repetition 1passedwrite p50 latency66,322.432 us
Disk write · repetition 1passedwrite p95 latency84,410.368 us
Disk write · repetition 1passedwrite p99 latency106,430.464 us
Disk read · repetition 1passedread bandwidth513.631 MB/s
Disk read · repetition 1passedread operations489.837 IOPS
Disk read · repetition 1passedread p50 latency62,128.128 us
Disk read · repetition 1passedread p95 latency82,313.216 us
Disk read · repetition 1passedread p99 latency96,993.28 us
Disk randwrite · repetition 1passedwrite bandwidth293.077 MB/s
Disk randwrite · repetition 1passedwrite operations71,551.982 IOPS
Disk randwrite · repetition 1passedwrite p50 latency395.264 us
Disk randwrite · repetition 1passedwrite p95 latency692.224 us
Disk randwrite · repetition 1passedwrite p99 latency1,351.68 us
Disk randread · repetition 1passedread bandwidth251.741 MB/s
Disk randread · repetition 1passedread operations61,460.285 IOPS
Disk randread · repetition 1passedread p50 latency468.992 us
Disk randread · repetition 1passedread p95 latency790.528 us
Disk randread · repetition 1passedread p99 latency1,384.448 us
Disk randrw · repetition 1passedread bandwidth164.495 MB/s
Disk randrw · repetition 1passedread operations40,159.895 IOPS
Disk randrw · repetition 1passedread p50 latency497.664 us
Disk randrw · repetition 1passedread p95 latency1,171.456 us
Disk randrw · repetition 1passedread p99 latency2,670.592 us
Disk randrw · repetition 1passedwrite bandwidth70.518 MB/s
Disk randrw · repetition 1passedwrite operations17,216.426 IOPS
Disk randrw · repetition 1passedwrite p50 latency342.016 us
Disk randrw · repetition 1passedwrite p95 latency987.136 us
Disk randrw · repetition 1passedwrite p99 latency1,843.2 us
Disk write · repetition 2passedwrite bandwidth505.764 MB/s
Disk write · repetition 2passedwrite operations482.334 IOPS
Disk write · repetition 2passedwrite p50 latency65,798.144 us
Disk write · repetition 2passedwrite p95 latency77,070.336 us
Disk write · repetition 2passedwrite p99 latency90,701.824 us
Disk read · repetition 2passedread bandwidth516.667 MB/s
Disk read · repetition 2passedread operations492.732 IOPS
Disk read · repetition 2passedread p50 latency64,225.28 us
Disk read · repetition 2passedread p95 latency71,827.456 us
Disk read · repetition 2passedread p99 latency84,410.368 us
Disk randwrite · repetition 2passedwrite bandwidth224.424 MB/s
Disk randwrite · repetition 2passedwrite operations54,791.04 IOPS
Disk randwrite · repetition 2passedwrite p50 latency407.552 us
Disk randwrite · repetition 2passedwrite p95 latency905.216 us
Disk randwrite · repetition 2passedwrite p99 latency6,324.224 us
Disk randread · repetition 2passedread bandwidth258.731 MB/s
Disk randread · repetition 2passedread operations63,166.861 IOPS
Disk randread · repetition 2passedread p50 latency452.608 us
Disk randread · repetition 2passedread p95 latency913.408 us
Disk randread · repetition 2passedread p99 latency1,220.608 us
Disk randrw · repetition 2passedread bandwidth163.003 MB/s
Disk randrw · repetition 2passedread operations39,795.694 IOPS
Disk randrw · repetition 2passedread p50 latency497.664 us
Disk randrw · repetition 2passedread p95 latency1,204.224 us
Disk randrw · repetition 2passedread p99 latency2,670.592 us
Disk randrw · repetition 2passedwrite bandwidth69.885 MB/s
Disk randrw · repetition 2passedwrite operations17,061.758 IOPS
Disk randrw · repetition 2passedwrite p50 latency346.112 us
Disk randrw · repetition 2passedwrite p95 latency1,056.768 us
Disk randrw · repetition 2passedwrite p99 latency1,957.888 us
Disk write · repetition 3passedwrite bandwidth497.101 MB/s
Disk write · repetition 3passedwrite operations474.073 IOPS
Disk write · repetition 3passedwrite p50 latency66,322.432 us
Disk write · repetition 3passedwrite p95 latency79,167.488 us
Disk write · repetition 3passedwrite p99 latency100,139.008 us
Disk read · repetition 3passedread bandwidth544.277 MB/s
Disk read · repetition 3passedread operations519.063 IOPS
Disk read · repetition 3passedread p50 latency61,079.552 us
Disk read · repetition 3passedread p95 latency66,322.432 us
Disk read · repetition 3passedread p99 latency80,216.064 us
Disk randwrite · repetition 3passedwrite bandwidth291.704 MB/s
Disk randwrite · repetition 3passedwrite operations71,216.893 IOPS
Disk randwrite · repetition 3passedwrite p50 latency399.36 us
Disk randwrite · repetition 3passedwrite p95 latency684.032 us
Disk randwrite · repetition 3passedwrite p99 latency1,335.296 us
Disk randread · repetition 3passedread bandwidth257.534 MB/s
Disk randread · repetition 3passedread operations62,874.571 IOPS
Disk randread · repetition 3passedread p50 latency456.704 us
Disk randread · repetition 3passedread p95 latency880.64 us
Disk randread · repetition 3passedread p99 latency1,220.608 us
Disk randrw · repetition 3passedread bandwidth164.548 MB/s
Disk randrw · repetition 3passedread operations40,172.928 IOPS
Disk randrw · repetition 3passedread p50 latency489.472 us
Disk randrw · repetition 3passedread p95 latency1,204.224 us
Disk randrw · repetition 3passedread p99 latency2,768.896 us
Disk randrw · repetition 3passedwrite bandwidth70.545 MB/s
Disk randrw · repetition 3passedwrite operations17,222.993 IOPS
Disk randrw · repetition 3passedwrite p50 latency342.016 us
Disk randrw · repetition 3passedwrite p95 latency1,044.48 us
Disk randrw · repetition 3passedwrite p99 latency1,925.12 us

Network performance

Workload / repetitionOutcomeMetricValue
Network upload endpoint 1 · repetition 1passedSender throughput100.148 Mbit/s
Network upload endpoint 1 · repetition 1passedReceiver throughput97.467 Mbit/s
Network download endpoint 1 · repetition 1passedSender throughput100.102 Mbit/s
Network download endpoint 1 · repetition 1passedReceiver throughput99.946 Mbit/s
Latency endpoint 1 · repetition 1passedRound-trip mean136.484 ms
Network upload endpoint 2 · repetition 1passedSender throughput100.155 Mbit/s
Network upload endpoint 2 · repetition 1passedReceiver throughput97.464 Mbit/s
Network download endpoint 2 · repetition 1passedSender throughput100.09 Mbit/s
Network download endpoint 2 · repetition 1passedReceiver throughput99.943 Mbit/s
Latency endpoint 2 · repetition 1passedRound-trip mean136.435 ms

PostgreSQL performance

Workload / repetitionOutcomeMetricValue
PostgreSQL memory dataset · repetition 1passedTransactions2,733.138 transactions/s
PostgreSQL memory dataset · repetition 1passedAverage latency1.461 ms
PostgreSQL memory dataset · repetition 2passedTransactions2,660.958 transactions/s
PostgreSQL memory dataset · repetition 2passedAverage latency1.501 ms
PostgreSQL memory dataset · repetition 3passedTransactions2,657.542 transactions/s
PostgreSQL memory dataset · repetition 3passedAverage latency1.502 ms
PostgreSQL storage dataset · repetition 1passedTransactions2,060.086 transactions/s
PostgreSQL storage dataset · repetition 1passedAverage latency1.939 ms
PostgreSQL storage dataset · repetition 2passedTransactions2,100.19 transactions/s
PostgreSQL storage dataset · repetition 2passedAverage latency1.902 ms
PostgreSQL storage dataset · repetition 3passedTransactions2,076.571 transactions/s
PostgreSQL storage dataset · repetition 3passedAverage latency1.923 ms

Consistency over time

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

One deployment during its recorded test window. Raw intake logs remain private; the JSON download contains the reviewed, sanitized snapshot.

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