AI-assisted review
Instance benchmarkDigitalOcean
c-4
The complete benchmark report. Every workload, in one place.
4 vCPU7.8 GiB RAMlon1x86_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.
1,083.84events/s
1 threads
1 threads
2,252.36events/s
4 threads
4 threads
- 1 threads1,083.84
- 4 threads2,252.36
Within-run medians; thread counts retain their recorded allocation.
Compression · 207.693 MiB/s · passed
02 /
Memory bandwidth
Sequential read and write · recorded sysbench workload.
Read11,270.65 MiB/s
Write9,551.34 MiB/s
- Read11,270.65
- Write9,551.34
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 | 1,877.109 MB/s | Not measured | 1,790.151 IOPS | Not measured | 35,389.44 us |
| read | 13,052.922 MB/s | Not measured | 12,448.237 IOPS | Not measured | 5,275.648 us | Not measured |
| randwrite | Not measured | 442.978 MB/s | Not measured | 108,148.995 IOPS | Not measured | 552.96 us |
| randread | 606.725 MB/s | Not measured | 148,126.129 IOPS | Not measured | 333.824 us | Not measured |
| randrw | 343.995 MB/s | 147.488 MB/s | 83,983.067 IOPS | 36,007.866 IOPS | 403.456 us | 342.016 us |
Read, write and mixed workloads are recorded separately. These are medians of measured repetitions.
04 /
Network performance
Source: lon1 · controlled London endpoints.
| Destination | Download (receiver) | Upload (receiver) | Round-trip mean |
|---|---|---|---|
| London endpoint 1 | 100.12 Mbit/s | 100.141 Mbit/s | 1.116 ms |
| London endpoint 2 | 100.121 Mbit/s | 100.089 Mbit/s | 3.368 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 | 3,755.682 transactions/s | 1.063 ms |
| storage | 2,974.777 transactions/s | 1.342 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
Window1931 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 | DigitalOcean · detected |
| Region | lon1 · detected |
| Plan | c-4 · supplied |
| CPU | Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz |
| Architecture | x86_64 |
| Kernel | 6.8.0-142-generic |
| Virtualization | kvm |
| 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 | c3eb2e7c01f15159032aac93c308aed89ee9645289179752f5a4b9d183a6e775 |
| Started | 2026-10-17T12:20:50.114Z |
| Finished | 2026-10-17T12:53:00.910Z |
| 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 | 1,082.85 events/s |
| CPU 4 thread(s) · repetition 1 | passed | Events per second | 2,248.74 events/s |
| CPU 1 thread(s) · repetition 2 | passed | Events per second | 1,086.32 events/s |
| CPU 4 thread(s) · repetition 2 | passed | Events per second | 2,252.36 events/s |
| CPU 1 thread(s) · repetition 3 | passed | Events per second | 1,083.84 events/s |
| CPU 4 thread(s) · repetition 3 | passed | Events per second | 2,261.18 events/s |
| gzip fixed corpus · repetition 1 | passed | Compression input throughput | 207.693 MiB/s |
Memory bandwidth
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Memory read · repetition 1 | passed | Bandwidth | 11,270.65 MiB/s |
| Memory write · repetition 1 | passed | Bandwidth | 9,551.34 MiB/s |
| Memory read · repetition 2 | passed | Bandwidth | 10,965.19 MiB/s |
| Memory write · repetition 2 | passed | Bandwidth | 9,492.08 MiB/s |
| Memory read · repetition 3 | passed | Bandwidth | 11,615.33 MiB/s |
| Memory write · repetition 3 | passed | Bandwidth | 9,806.53 MiB/s |
Disk performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Disk write · repetition 1 | passed | write bandwidth | 1,924.579 MB/s |
| Disk write · repetition 1 | passed | write operations | 1,835.422 IOPS |
| Disk write · repetition 1 | passed | write p50 latency | 14,745.6 us |
| Disk write · repetition 1 | passed | write p95 latency | 34,340.864 us |
| Disk write · repetition 1 | passed | write p99 latency | 46,399.488 us |
| Disk read · repetition 1 | passed | read bandwidth | 12,724.076 MB/s |
| Disk read · repetition 1 | passed | read operations | 12,134.624 IOPS |
| Disk read · repetition 1 | passed | read p50 latency | 2,088.96 us |
| Disk read · repetition 1 | passed | read p95 latency | 5,865.472 us |
| Disk read · repetition 1 | passed | read p99 latency | 12,910.592 us |
| Disk randwrite · repetition 1 | passed | write bandwidth | 442.978 MB/s |
| Disk randwrite · repetition 1 | passed | write operations | 108,148.995 IOPS |
| Disk randwrite · repetition 1 | passed | write p50 latency | 272.384 us |
| Disk randwrite · repetition 1 | passed | write p95 latency | 536.576 us |
| Disk randwrite · repetition 1 | passed | write p99 latency | 823.296 us |
| Disk randread · repetition 1 | passed | read bandwidth | 616.273 MB/s |
| Disk randread · repetition 1 | passed | read operations | 150,457.318 IOPS |
| Disk randread · repetition 1 | passed | read p50 latency | 193.536 us |
| Disk randread · repetition 1 | passed | read p95 latency | 329.728 us |
| Disk randread · repetition 1 | passed | read p99 latency | 370.688 us |
| Disk randrw · repetition 1 | passed | read bandwidth | 343.995 MB/s |
| Disk randrw · repetition 1 | passed | read operations | 83,983.067 IOPS |
| Disk randrw · repetition 1 | passed | read p50 latency | 261.12 us |
| Disk randrw · repetition 1 | passed | read p95 latency | 403.456 us |
| Disk randrw · repetition 1 | passed | read p99 latency | 593.92 us |
| Disk randrw · repetition 1 | passed | write bandwidth | 147.488 MB/s |
| Disk randrw · repetition 1 | passed | write operations | 36,007.866 IOPS |
| Disk randrw · repetition 1 | passed | write p50 latency | 207.872 us |
| Disk randrw · repetition 1 | passed | write p95 latency | 342.016 us |
| Disk randrw · repetition 1 | passed | write p99 latency | 460.8 us |
| Disk write · repetition 2 | passed | write bandwidth | 1,810.703 MB/s |
| Disk write · repetition 2 | passed | write operations | 1,726.821 IOPS |
| Disk write · repetition 2 | passed | write p50 latency | 15,925.248 us |
| Disk write · repetition 2 | passed | write p95 latency | 35,389.44 us |
| Disk write · repetition 2 | passed | write p99 latency | 50,069.504 us |
| Disk read · repetition 2 | passed | read bandwidth | 16,049.693 MB/s |
| Disk read · repetition 2 | passed | read operations | 15,306.18 IOPS |
| Disk read · repetition 2 | passed | read p50 latency | 1,875.968 us |
| Disk read · repetition 2 | passed | read p95 latency | 3,293.184 us |
| Disk read · repetition 2 | passed | read p99 latency | 8,159.232 us |
| Disk randwrite · repetition 2 | passed | write bandwidth | 451.005 MB/s |
| Disk randwrite · repetition 2 | passed | write operations | 110,108.596 IOPS |
| Disk randwrite · repetition 2 | passed | write p50 latency | 268.288 us |
| Disk randwrite · repetition 2 | passed | write p95 latency | 552.96 us |
| Disk randwrite · repetition 2 | passed | write p99 latency | 823.296 us |
| Disk randread · repetition 2 | passed | read bandwidth | 606.725 MB/s |
| Disk randread · repetition 2 | passed | read operations | 148,126.129 IOPS |
| Disk randread · repetition 2 | passed | read p50 latency | 193.536 us |
| Disk randread · repetition 2 | passed | read p95 latency | 333.824 us |
| Disk randread · repetition 2 | passed | read p99 latency | 354.304 us |
| Disk randrw · repetition 2 | passed | read bandwidth | 357.898 MB/s |
| Disk randrw · repetition 2 | passed | read operations | 87,377.387 IOPS |
| Disk randrw · repetition 2 | passed | read p50 latency | 250.88 us |
| Disk randrw · repetition 2 | passed | read p95 latency | 395.264 us |
| Disk randrw · repetition 2 | passed | read p99 latency | 618.496 us |
| Disk randrw · repetition 2 | passed | write bandwidth | 153.426 MB/s |
| Disk randrw · repetition 2 | passed | write operations | 37,457.585 IOPS |
| Disk randrw · repetition 2 | passed | write p50 latency | 195.584 us |
| Disk randrw · repetition 2 | passed | write p95 latency | 333.824 us |
| Disk randrw · repetition 2 | passed | write p99 latency | 481.28 us |
| Disk write · repetition 3 | passed | write bandwidth | 1,877.109 MB/s |
| Disk write · repetition 3 | passed | write operations | 1,790.151 IOPS |
| Disk write · repetition 3 | passed | write p50 latency | 15,138.816 us |
| Disk write · repetition 3 | passed | write p95 latency | 35,389.44 us |
| Disk write · repetition 3 | passed | write p99 latency | 46,923.776 us |
| Disk read · repetition 3 | passed | read bandwidth | 13,052.922 MB/s |
| Disk read · repetition 3 | passed | read operations | 12,448.237 IOPS |
| Disk read · repetition 3 | passed | read p50 latency | 2,146.304 us |
| Disk read · repetition 3 | passed | read p95 latency | 5,275.648 us |
| Disk read · repetition 3 | passed | read p99 latency | 11,468.8 us |
| Disk randwrite · repetition 3 | passed | write bandwidth | 434.846 MB/s |
| Disk randwrite · repetition 3 | passed | write operations | 106,163.561 IOPS |
| Disk randwrite · repetition 3 | passed | write p50 latency | 276.48 us |
| Disk randwrite · repetition 3 | passed | write p95 latency | 561.152 us |
| Disk randwrite · repetition 3 | passed | write p99 latency | 823.296 us |
| Disk randread · repetition 3 | passed | read bandwidth | 599.411 MB/s |
| Disk randread · repetition 3 | passed | read operations | 146,340.455 IOPS |
| Disk randread · repetition 3 | passed | read p50 latency | 195.584 us |
| Disk randread · repetition 3 | passed | read p95 latency | 333.824 us |
| Disk randread · repetition 3 | passed | read p99 latency | 354.304 us |
| Disk randrw · repetition 3 | passed | read bandwidth | 339.342 MB/s |
| Disk randrw · repetition 3 | passed | read operations | 82,847.105 IOPS |
| Disk randrw · repetition 3 | passed | read p50 latency | 264.192 us |
| Disk randrw · repetition 3 | passed | read p95 latency | 403.456 us |
| Disk randrw · repetition 3 | passed | read p99 latency | 643.072 us |
| Disk randrw · repetition 3 | passed | write bandwidth | 145.499 MB/s |
| Disk randrw · repetition 3 | passed | write operations | 35,522.316 IOPS |
| Disk randrw · repetition 3 | passed | write p50 latency | 211.968 us |
| Disk randrw · repetition 3 | passed | write p95 latency | 342.016 us |
| Disk randrw · repetition 3 | passed | write p99 latency | 505.856 us |
Network performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Network upload endpoint 1 · repetition 1 | passed | Sender throughput | 100.157 Mbit/s |
| Network upload endpoint 1 · repetition 1 | passed | Receiver throughput | 100.141 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Sender throughput | 100.099 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Receiver throughput | 100.12 Mbit/s |
| Latency endpoint 1 · repetition 1 | passed | Round-trip mean | 1.116 ms |
| Network upload endpoint 2 · repetition 1 | passed | Sender throughput | 100.158 Mbit/s |
| Network upload endpoint 2 · repetition 1 | passed | Receiver throughput | 100.089 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Sender throughput | 100.066 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Receiver throughput | 100.121 Mbit/s |
| Latency endpoint 2 · repetition 1 | passed | Round-trip mean | 3.368 ms |
PostgreSQL performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| PostgreSQL memory dataset · repetition 1 | passed | Transactions | 3,755.682 transactions/s |
| PostgreSQL memory dataset · repetition 1 | passed | Average latency | 1.063 ms |
| PostgreSQL memory dataset · repetition 2 | passed | Transactions | 3,762.978 transactions/s |
| PostgreSQL memory dataset · repetition 2 | passed | Average latency | 1.061 ms |
| PostgreSQL memory dataset · repetition 3 | passed | Transactions | 3,601.93 transactions/s |
| PostgreSQL memory dataset · repetition 3 | passed | Average latency | 1.108 ms |
| PostgreSQL storage dataset · repetition 1 | passed | Transactions | 2,974.777 transactions/s |
| PostgreSQL storage dataset · repetition 1 | passed | Average latency | 1.342 ms |
| PostgreSQL storage dataset · repetition 2 | passed | Transactions | 3,031.374 transactions/s |
| PostgreSQL storage dataset · repetition 2 | passed | Average latency | 1.317 ms |
| PostgreSQL storage dataset · repetition 3 | passed | Transactions | 2,789.73 transactions/s |
| PostgreSQL storage dataset · repetition 3 | passed | Average latency | 1.432 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.