AI-assisted review
Instance benchmarkVultr
vc2-4c-8gb
The complete benchmark report. Every workload, in one place.
4 vCPU7.7 GiB RAMSJCx86_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.
417.65events/s
1 threads
1 threads
1,644.98events/s
4 threads
4 threads
- 1 threads417.65
- 4 threads1,644.98
Within-run medians; thread counts retain their recorded allocation.
Compression · 206.83 MiB/s · passed
02 /
Memory bandwidth
Sequential read and write · recorded sysbench workload.
Read8,484 MiB/s
Write8,195.79 MiB/s
- Read8,484
- Write8,195.79
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 | 363.352 MB/s | Not measured | 346.52 IOPS | Not measured | 116,916.224 us |
| read | 546.985 MB/s | Not measured | 521.645 IOPS | Not measured | 78,118.912 us | Not measured |
| randwrite | Not measured | 147.098 MB/s | Not measured | 35,912.481 IOPS | Not measured | 1,466.368 us |
| randread | 250.861 MB/s | Not measured | 61,245.325 IOPS | Not measured | 847.872 us | Not measured |
| randrw | 120.796 MB/s | 51.806 MB/s | 29,491.117 IOPS | 12,647.978 IOPS | 1,794.048 us | 1,384.448 us |
Read, write and mixed workloads are recorded separately. These are medians of measured repetitions.
04 /
Network performance
Source: SJC · controlled London endpoints.
| Destination | Download (receiver) | Upload (receiver) | Round-trip mean |
|---|---|---|---|
| London endpoint 1 | 99.769 Mbit/s | 97.467 Mbit/s | 136.211 ms |
| London endpoint 2 | 99.944 Mbit/s | 97.471 Mbit/s | 135.79 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 | 2,974.709 transactions/s | 1.342 ms |
| storage | 2,116.81 transactions/s | 1.887 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
Window1877 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.
Environment and configuration
| Recorded field | Value |
|---|---|
| Provider | Vultr · detected |
| Region | SJC · 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 | 72886dac270518a1ed0500297796cf6203e66942956f3f31acb03ecc36ba6612 |
| Started | 2026-10-17T11:54:35.232Z |
| Finished | 2026-10-17T12:25:51.905Z |
| 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 | 417.65 events/s |
| CPU 4 thread(s) · repetition 1 | passed | Events per second | 1,670.09 events/s |
| CPU 1 thread(s) · repetition 2 | passed | Events per second | 414.26 events/s |
| CPU 4 thread(s) · repetition 2 | passed | Events per second | 1,620.02 events/s |
| CPU 1 thread(s) · repetition 3 | passed | Events per second | 420.3 events/s |
| CPU 4 thread(s) · repetition 3 | passed | Events per second | 1,644.98 events/s |
| gzip fixed corpus · repetition 1 | passed | Compression input throughput | 206.83 MiB/s |
Memory bandwidth
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Memory read · repetition 1 | passed | Bandwidth | 8,484 MiB/s |
| Memory write · repetition 1 | passed | Bandwidth | 8,143.29 MiB/s |
| Memory read · repetition 2 | passed | Bandwidth | 8,494.72 MiB/s |
| Memory write · repetition 2 | passed | Bandwidth | 8,320.45 MiB/s |
| Memory read · repetition 3 | passed | Bandwidth | 8,459.84 MiB/s |
| Memory write · repetition 3 | passed | Bandwidth | 8,195.79 MiB/s |
Disk performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Disk write · repetition 1 | passed | write bandwidth | 341.009 MB/s |
| Disk write · repetition 1 | passed | write operations | 325.211 IOPS |
| Disk write · repetition 1 | passed | write p50 latency | 95,944.704 us |
| Disk write · repetition 1 | passed | write p95 latency | 131,596.288 us |
| Disk write · repetition 1 | passed | write p99 latency | 158,334.976 us |
| Disk read · repetition 1 | passed | read bandwidth | 508.293 MB/s |
| Disk read · repetition 1 | passed | read operations | 484.746 IOPS |
| Disk read · repetition 1 | passed | read p50 latency | 61,603.84 us |
| Disk read · repetition 1 | passed | read p95 latency | 91,750.4 us |
| Disk read · repetition 1 | passed | read p99 latency | 101,187.584 us |
| Disk randwrite · repetition 1 | passed | write bandwidth | 147.098 MB/s |
| Disk randwrite · repetition 1 | passed | write operations | 35,912.481 IOPS |
| Disk randwrite · repetition 1 | passed | write p50 latency | 428.032 us |
| Disk randwrite · repetition 1 | passed | write p95 latency | 1,466.368 us |
| Disk randwrite · repetition 1 | passed | write p99 latency | 15,400.96 us |
| Disk randread · repetition 1 | passed | read bandwidth | 250.861 MB/s |
| Disk randread · repetition 1 | passed | read operations | 61,245.325 IOPS |
| Disk randread · repetition 1 | passed | read p50 latency | 346.112 us |
| Disk randread · repetition 1 | passed | read p95 latency | 585.728 us |
| Disk randread · repetition 1 | passed | read p99 latency | 2,572.288 us |
| Disk randrw · repetition 1 | passed | read bandwidth | 157.467 MB/s |
| Disk randrw · repetition 1 | passed | read operations | 38,444.052 IOPS |
| Disk randrw · repetition 1 | passed | read p50 latency | 415.744 us |
| Disk randrw · repetition 1 | passed | read p95 latency | 1,515.52 us |
| Disk randrw · repetition 1 | passed | read p99 latency | 2,179.072 us |
| Disk randrw · repetition 1 | passed | write bandwidth | 67.509 MB/s |
| Disk randrw · repetition 1 | passed | write operations | 16,481.584 IOPS |
| Disk randrw · repetition 1 | passed | write p50 latency | 342.016 us |
| Disk randrw · repetition 1 | passed | write p95 latency | 1,171.456 us |
| Disk randrw · repetition 1 | passed | write p99 latency | 5,603.328 us |
| Disk write · repetition 2 | passed | write bandwidth | 369.21 MB/s |
| Disk write · repetition 2 | passed | write operations | 352.106 IOPS |
| Disk write · repetition 2 | passed | write p50 latency | 88,604.672 us |
| Disk write · repetition 2 | passed | write p95 latency | 113,770.496 us |
| Disk write · repetition 2 | passed | write p99 latency | 141,557.76 us |
| Disk read · repetition 2 | passed | read bandwidth | 552.512 MB/s |
| Disk read · repetition 2 | passed | read operations | 526.916 IOPS |
| Disk read · repetition 2 | passed | read p50 latency | 60,030.976 us |
| Disk read · repetition 2 | passed | read p95 latency | 70,778.88 us |
| Disk read · repetition 2 | passed | read p99 latency | 84,410.368 us |
| Disk randwrite · repetition 2 | passed | write bandwidth | 162.175 MB/s |
| Disk randwrite · repetition 2 | passed | write operations | 39,593.414 IOPS |
| Disk randwrite · repetition 2 | passed | write p50 latency | 419.84 us |
| Disk randwrite · repetition 2 | passed | write p95 latency | 1,384.448 us |
| Disk randwrite · repetition 2 | passed | write p99 latency | 13,041.664 us |
| Disk randread · repetition 2 | passed | read bandwidth | 284.21 MB/s |
| Disk randread · repetition 2 | passed | read operations | 69,387.154 IOPS |
| Disk randread · repetition 2 | passed | read p50 latency | 354.304 us |
| Disk randread · repetition 2 | passed | read p95 latency | 847.872 us |
| Disk randread · repetition 2 | passed | read p99 latency | 1,122.304 us |
| Disk randrw · repetition 2 | passed | read bandwidth | 120.796 MB/s |
| Disk randrw · repetition 2 | passed | read operations | 29,491.117 IOPS |
| Disk randrw · repetition 2 | passed | read p50 latency | 536.576 us |
| Disk randrw · repetition 2 | passed | read p95 latency | 1,794.048 us |
| Disk randrw · repetition 2 | passed | read p99 latency | 2,768.896 us |
| Disk randrw · repetition 2 | passed | write bandwidth | 51.806 MB/s |
| Disk randrw · repetition 2 | passed | write operations | 12,647.978 IOPS |
| Disk randrw · repetition 2 | passed | write p50 latency | 419.84 us |
| Disk randrw · repetition 2 | passed | write p95 latency | 1,384.448 us |
| Disk randrw · repetition 2 | passed | write p99 latency | 5,144.576 us |
| Disk write · repetition 3 | passed | write bandwidth | 363.352 MB/s |
| Disk write · repetition 3 | passed | write operations | 346.52 IOPS |
| Disk write · repetition 3 | passed | write p50 latency | 89,653.248 us |
| Disk write · repetition 3 | passed | write p95 latency | 116,916.224 us |
| Disk write · repetition 3 | passed | write p99 latency | 141,557.76 us |
| Disk read · repetition 3 | passed | read bandwidth | 546.985 MB/s |
| Disk read · repetition 3 | passed | read operations | 521.645 IOPS |
| Disk read · repetition 3 | passed | read p50 latency | 60,030.976 us |
| Disk read · repetition 3 | passed | read p95 latency | 78,118.912 us |
| Disk read · repetition 3 | passed | read p99 latency | 92,798.976 us |
| Disk randwrite · repetition 3 | passed | write bandwidth | 134.511 MB/s |
| Disk randwrite · repetition 3 | passed | write operations | 32,839.544 IOPS |
| Disk randwrite · repetition 3 | passed | write p50 latency | 536.576 us |
| Disk randwrite · repetition 3 | passed | write p95 latency | 2,179.072 us |
| Disk randwrite · repetition 3 | passed | write p99 latency | 12,517.376 us |
| Disk randread · repetition 3 | passed | read bandwidth | 232.476 MB/s |
| Disk randread · repetition 3 | passed | read operations | 56,756.841 IOPS |
| Disk randread · repetition 3 | passed | read p50 latency | 391.168 us |
| Disk randread · repetition 3 | passed | read p95 latency | 978.944 us |
| Disk randread · repetition 3 | passed | read p99 latency | 2,088.96 us |
| Disk randrw · repetition 3 | passed | read bandwidth | 120.45 MB/s |
| Disk randrw · repetition 3 | passed | read operations | 29,406.786 IOPS |
| Disk randrw · repetition 3 | passed | read p50 latency | 544.768 us |
| Disk randrw · repetition 3 | passed | read p95 latency | 1,826.816 us |
| Disk randrw · repetition 3 | passed | read p99 latency | 2,801.664 us |
| Disk randrw · repetition 3 | passed | write bandwidth | 51.651 MB/s |
| Disk randrw · repetition 3 | passed | write operations | 12,610.08 IOPS |
| Disk randrw · repetition 3 | passed | write p50 latency | 428.032 us |
| Disk randrw · repetition 3 | passed | write p95 latency | 1,449.984 us |
| Disk randrw · repetition 3 | passed | write p99 latency | 6,455.296 us |
Network performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Network upload endpoint 1 · repetition 1 | passed | Sender throughput | 100.144 Mbit/s |
| Network upload endpoint 1 · repetition 1 | passed | Receiver throughput | 97.467 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Sender throughput | 100.016 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Receiver throughput | 99.769 Mbit/s |
| Latency endpoint 1 · repetition 1 | passed | Round-trip mean | 136.211 ms |
| Network upload endpoint 2 · repetition 1 | passed | Sender throughput | 100.147 Mbit/s |
| Network upload endpoint 2 · repetition 1 | passed | Receiver throughput | 97.471 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Sender throughput | 100.109 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Receiver throughput | 99.944 Mbit/s |
| Latency endpoint 2 · repetition 1 | passed | Round-trip mean | 135.79 ms |
PostgreSQL performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| PostgreSQL memory dataset · repetition 1 | passed | Transactions | 2,812.195 transactions/s |
| PostgreSQL memory dataset · repetition 1 | passed | Average latency | 1.42 ms |
| PostgreSQL memory dataset · repetition 2 | passed | Transactions | 2,974.709 transactions/s |
| PostgreSQL memory dataset · repetition 2 | passed | Average latency | 1.342 ms |
| PostgreSQL memory dataset · repetition 3 | passed | Transactions | 3,088.307 transactions/s |
| PostgreSQL memory dataset · repetition 3 | passed | Average latency | 1.292 ms |
| PostgreSQL storage dataset · repetition 1 | passed | Transactions | 2,039.13 transactions/s |
| PostgreSQL storage dataset · repetition 1 | passed | Average latency | 1.959 ms |
| PostgreSQL storage dataset · repetition 2 | passed | Transactions | 2,296.485 transactions/s |
| PostgreSQL storage dataset · repetition 2 | passed | Average latency | 1.739 ms |
| PostgreSQL storage dataset · repetition 3 | passed | Transactions | 2,116.81 transactions/s |
| PostgreSQL storage dataset · repetition 3 | passed | Average latency | 1.887 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.