AI-assisted review
Instance benchmarkVultr
vc2-4c-8gb
The complete benchmark report. Every workload, in one place.
4 vCPU7.7 GiB RAMLHRx86_64
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.
403.04events/s
1 threads
1 threads
1,560.95events/s
4 threads
4 threads
- 1 threads403.04
- 4 threads1,560.95
Within-run medians; thread counts retain their recorded allocation.
Compression · 180.703 MiB/s · passed
02 /
Memory bandwidth
Sequential read and write · recorded sysbench workload.
Read7,019.14 MiB/s
Write7,077.46 MiB/s
- Read7,019.14
- Write7,077.46
Memory copy was not measured.
03 /
Disk performance
fio · direct I/O · recorded sequential and random workloads.
| Workload | Read bandwidth | Write bandwidth | Read IOPS | Write IOPS | Read p95 | Write p95 |
|---|---|---|---|---|---|---|
| write | Not measured | 521.114 MB/s | Not measured | 496.973 IOPS | Not measured | 77,070.336 us |
| read | 551.219 MB/s | Not measured | 525.684 IOPS | Not measured | 68,681.728 us | Not measured |
| randwrite | Not measured | 206.276 MB/s | Not measured | 50,360.319 IOPS | Not measured | 741.376 us |
| randread | 311.682 MB/s | Not measured | 76,094.23 IOPS | Not measured | 569.344 us | Not measured |
| randrw | 181.037 MB/s | 77.649 MB/s | 44,198.381 IOPS | 18,957.359 IOPS | 1,400.832 us | 577.536 us |
Read, write and mixed workloads are recorded separately. These are medians of measured repetitions.
04 /
Network performance
Source: LHR · controlled London endpoints.
| Destination | Download (receiver) | Upload (receiver) | Round-trip mean |
|---|---|---|---|
| London endpoint 1 | 100.12 Mbit/s | 100.092 Mbit/s | 3.894 ms |
| London endpoint 2 | 100.12 Mbit/s | 100.136 Mbit/s | 0.364 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 profile | Transactions / sec | Average latency |
|---|---|---|
| memory | 3,089.739 transactions/s | 1.292 ms |
| storage | 2,529.66 transactions/s | 1.579 ms |
Within-run medians. PostgreSQL latency percentiles were not measured.
06 /
Consistency over time
Recorded outcomes only; no synthetic time-series.
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| 24-hour consistency · repetition 1 | skipped | No measured score | Not 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
Window2486 seconds
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 field | Value |
|---|---|
| Provider | Vultr · detected |
| Region | LHR · detected |
| Plan | vc2-4c-8gb · supplied |
| CPU | Intel Xeon Processor (Skylake, IBRS) |
| Architecture | x86_64 |
| Kernel | 6.8.0-146-generic |
| Virtualization | microsoft |
| Agent | 0.2.0 (45388107250ca6e26b216f15a9c17b8d405ec1b7+source.ff98e866b26b3ac76b512554) |
| Dependencies | sysbench: 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 hash | 02cc433ad56706c6dabc7d4e5574432106311860841b52d5650a23f28c636338 |
| Started | 2026-10-17T11:42:17.000Z |
| Finished | 2026-10-17T12:23:42.816Z |
| Execution status | completed |
Every measured repetition and outcome
CPU performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| CPU 1 thread(s) · repetition 1 | passed | Events per second | 403.04 events/s |
| CPU 4 thread(s) · repetition 1 | passed | Events per second | 1,578.35 events/s |
| CPU 1 thread(s) · repetition 2 | passed | Events per second | 401.09 events/s |
| CPU 4 thread(s) · repetition 2 | passed | Events per second | 1,541.39 events/s |
| CPU 1 thread(s) · repetition 3 | passed | Events per second | 413.11 events/s |
| CPU 4 thread(s) · repetition 3 | passed | Events per second | 1,560.95 events/s |
| gzip fixed corpus · repetition 1 | passed | Compression input throughput | 180.703 MiB/s |
Memory bandwidth
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Memory read · repetition 1 | passed | Bandwidth | 7,097.7 MiB/s |
| Memory write · repetition 1 | passed | Bandwidth | 7,037.05 MiB/s |
| Memory read · repetition 2 | passed | Bandwidth | 7,019.14 MiB/s |
| Memory write · repetition 2 | passed | Bandwidth | 7,077.46 MiB/s |
| Memory read · repetition 3 | passed | Bandwidth | 6,964.84 MiB/s |
| Memory write · repetition 3 | passed | Bandwidth | 7,124.37 MiB/s |
Disk performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Disk write · repetition 1 | passed | write bandwidth | 509.409 MB/s |
| Disk write · repetition 1 | passed | write operations | 485.81 IOPS |
| Disk write · repetition 1 | passed | write p50 latency | 63,176.704 us |
| Disk write · repetition 1 | passed | write p95 latency | 80,216.064 us |
| Disk write · repetition 1 | passed | write p99 latency | 95,944.704 us |
| Disk read · repetition 1 | passed | read bandwidth | 524.776 MB/s |
| Disk read · repetition 1 | passed | read operations | 500.466 IOPS |
| Disk read · repetition 1 | passed | read p50 latency | 60,030.976 us |
| Disk read · repetition 1 | passed | read p95 latency | 86,507.52 us |
| Disk read · repetition 1 | passed | read p99 latency | 96,993.28 us |
| Disk randwrite · repetition 1 | passed | write bandwidth | 209.194 MB/s |
| Disk randwrite · repetition 1 | passed | write operations | 51,072.852 IOPS |
| Disk randwrite · repetition 1 | passed | write p50 latency | 419.84 us |
| Disk randwrite · repetition 1 | passed | write p95 latency | 733.184 us |
| Disk randwrite · repetition 1 | passed | write p99 latency | 7,831.552 us |
| Disk randread · repetition 1 | passed | read bandwidth | 310.991 MB/s |
| Disk randread · repetition 1 | passed | read operations | 75,925.602 IOPS |
| Disk randread · repetition 1 | passed | read p50 latency | 403.456 us |
| Disk randread · repetition 1 | passed | read p95 latency | 569.344 us |
| Disk randread · repetition 1 | passed | read p99 latency | 684.032 us |
| Disk randrw · repetition 1 | passed | read bandwidth | 181.037 MB/s |
| Disk randrw · repetition 1 | passed | read operations | 44,198.381 IOPS |
| Disk randrw · repetition 1 | passed | read p50 latency | 423.936 us |
| Disk randrw · repetition 1 | passed | read p95 latency | 1,400.832 us |
| Disk randrw · repetition 1 | passed | read p99 latency | 2,088.96 us |
| Disk randrw · repetition 1 | passed | write bandwidth | 77.649 MB/s |
| Disk randrw · repetition 1 | passed | write operations | 18,957.359 IOPS |
| Disk randrw · repetition 1 | passed | write p50 latency | 366.592 us |
| Disk randrw · repetition 1 | passed | write p95 latency | 577.536 us |
| Disk randrw · repetition 1 | passed | write p99 latency | 806.912 us |
| Disk write · repetition 2 | passed | write bandwidth | 521.114 MB/s |
| Disk write · repetition 2 | passed | write operations | 496.973 IOPS |
| Disk write · repetition 2 | passed | write p50 latency | 62,128.128 us |
| Disk write · repetition 2 | passed | write p95 latency | 77,070.336 us |
| Disk write · repetition 2 | passed | write p99 latency | 91,750.4 us |
| Disk read · repetition 2 | passed | read bandwidth | 551.219 MB/s |
| Disk read · repetition 2 | passed | read operations | 525.684 IOPS |
| Disk read · repetition 2 | passed | read p50 latency | 60,030.976 us |
| Disk read · repetition 2 | passed | read p95 latency | 68,681.728 us |
| Disk read · repetition 2 | passed | read p99 latency | 85,458.944 us |
| Disk randwrite · repetition 2 | passed | write bandwidth | 206.276 MB/s |
| Disk randwrite · repetition 2 | passed | write operations | 50,360.319 IOPS |
| Disk randwrite · repetition 2 | passed | write p50 latency | 428.032 us |
| Disk randwrite · repetition 2 | passed | write p95 latency | 782.336 us |
| Disk randwrite · repetition 2 | passed | write p99 latency | 8,093.696 us |
| Disk randread · repetition 2 | passed | read bandwidth | 313.925 MB/s |
| Disk randread · repetition 2 | passed | read operations | 76,641.779 IOPS |
| Disk randread · repetition 2 | passed | read p50 latency | 399.36 us |
| Disk randread · repetition 2 | passed | read p95 latency | 569.344 us |
| Disk randread · repetition 2 | passed | read p99 latency | 692.224 us |
| Disk randrw · repetition 2 | passed | read bandwidth | 180.235 MB/s |
| Disk randrw · repetition 2 | passed | read operations | 44,002.633 IOPS |
| Disk randrw · repetition 2 | passed | read p50 latency | 419.84 us |
| Disk randrw · repetition 2 | passed | read p95 latency | 1,400.832 us |
| Disk randrw · repetition 2 | passed | read p99 latency | 2,113.536 us |
| Disk randrw · repetition 2 | passed | write bandwidth | 77.299 MB/s |
| Disk randrw · repetition 2 | passed | write operations | 18,871.904 IOPS |
| Disk randrw · repetition 2 | passed | write p50 latency | 362.496 us |
| Disk randrw · repetition 2 | passed | write p95 latency | 577.536 us |
| Disk randrw · repetition 2 | passed | write p99 latency | 1,073.152 us |
| Disk write · repetition 3 | passed | write bandwidth | 522.404 MB/s |
| Disk write · repetition 3 | passed | write operations | 498.203 IOPS |
| Disk write · repetition 3 | passed | write p50 latency | 62,128.128 us |
| Disk write · repetition 3 | passed | write p95 latency | 74,973.184 us |
| Disk write · repetition 3 | passed | write p99 latency | 90,701.824 us |
| Disk read · repetition 3 | passed | read bandwidth | 555.055 MB/s |
| Disk read · repetition 3 | passed | read operations | 529.341 IOPS |
| Disk read · repetition 3 | passed | read p50 latency | 60,030.976 us |
| Disk read · repetition 3 | passed | read p95 latency | 68,681.728 us |
| Disk read · repetition 3 | passed | read p99 latency | 83,361.792 us |
| Disk randwrite · repetition 3 | passed | write bandwidth | 205.89 MB/s |
| Disk randwrite · repetition 3 | passed | write operations | 50,266.218 IOPS |
| Disk randwrite · repetition 3 | passed | write p50 latency | 407.552 us |
| Disk randwrite · repetition 3 | passed | write p95 latency | 741.376 us |
| Disk randwrite · repetition 3 | passed | write p99 latency | 9,371.648 us |
| Disk randread · repetition 3 | passed | read bandwidth | 311.682 MB/s |
| Disk randread · repetition 3 | passed | read operations | 76,094.23 IOPS |
| Disk randread · repetition 3 | passed | read p50 latency | 403.456 us |
| Disk randread · repetition 3 | passed | read p95 latency | 577.536 us |
| Disk randread · repetition 3 | passed | read p99 latency | 692.224 us |
| Disk randrw · repetition 3 | passed | read bandwidth | 182.129 MB/s |
| Disk randrw · repetition 3 | passed | read operations | 44,465.084 IOPS |
| Disk randrw · repetition 3 | passed | read p50 latency | 419.84 us |
| Disk randrw · repetition 3 | passed | read p95 latency | 1,400.832 us |
| Disk randrw · repetition 3 | passed | read p99 latency | 2,088.96 us |
| Disk randrw · repetition 3 | passed | write bandwidth | 78.121 MB/s |
| Disk randrw · repetition 3 | passed | write operations | 19,072.598 IOPS |
| Disk randrw · repetition 3 | passed | write p50 latency | 354.304 us |
| Disk randrw · repetition 3 | passed | write p95 latency | 569.344 us |
| Disk randrw · repetition 3 | passed | write p99 latency | 864.256 us |
Network performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Network upload endpoint 1 · repetition 1 | passed | Sender throughput | 100.156 Mbit/s |
| Network upload endpoint 1 · repetition 1 | passed | Receiver throughput | 100.092 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Sender throughput | 100.08 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Receiver throughput | 100.12 Mbit/s |
| Latency endpoint 1 · repetition 1 | passed | Round-trip mean | 3.894 ms |
| Network upload endpoint 2 · repetition 1 | passed | Sender throughput | 100.154 Mbit/s |
| Network upload endpoint 2 · repetition 1 | passed | Receiver throughput | 100.136 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Sender throughput | 100.114 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Receiver throughput | 100.12 Mbit/s |
| Latency endpoint 2 · repetition 1 | passed | Round-trip mean | 0.364 ms |
PostgreSQL performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| PostgreSQL memory dataset · repetition 1 | passed | Transactions | 3,136.366 transactions/s |
| PostgreSQL memory dataset · repetition 1 | passed | Average latency | 1.272 ms |
| PostgreSQL memory dataset · repetition 2 | passed | Transactions | 3,089.739 transactions/s |
| PostgreSQL memory dataset · repetition 2 | passed | Average latency | 1.292 ms |
| PostgreSQL memory dataset · repetition 3 | passed | Transactions | 3,086.268 transactions/s |
| PostgreSQL memory dataset · repetition 3 | passed | Average latency | 1.293 ms |
| PostgreSQL storage dataset · repetition 1 | passed | Transactions | 2,527.26 transactions/s |
| PostgreSQL storage dataset · repetition 1 | passed | Average latency | 1.58 ms |
| PostgreSQL storage dataset · repetition 2 | passed | Transactions | 2,529.66 transactions/s |
| PostgreSQL storage dataset · repetition 2 | passed | Average latency | 1.579 ms |
| PostgreSQL storage dataset · repetition 3 | passed | Transactions | 2,581.247 transactions/s |
| PostgreSQL storage dataset · repetition 3 | passed | Average latency | 1.547 ms |
Consistency over time
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| 24-hour consistency · repetition 1 | skipped | No measured score | Not measured |
One deployment during its recorded test window. Raw intake logs remain private; the JSON download contains the reviewed, sanitized snapshot.