AI-assisted review
Instance benchmarkDigitalOcean
c-4
The complete benchmark report. Every workload, in one place.
4 vCPU7.8 GiB RAMsfo2x86_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.
449.66events/s
1 threads
1 threads
1,395.44events/s
4 threads
4 threads
- 1 threads449.66
- 4 threads1,395.44
Within-run medians; thread counts retain their recorded allocation.
Compression · 206.933 MiB/s · passed
02 /
Memory bandwidth
Sequential read and write · recorded sysbench workload.
Read7,598.89 MiB/s
Write7,783.73 MiB/s
- Read7,598.89
- Write7,783.73
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 | 1,168.765 MB/s | Not measured | 1,114.621 IOPS | Not measured | 57,409.536 us |
| read | 2,961.951 MB/s | Not measured | 2,824.737 IOPS | Not measured | 12,779.52 us | Not measured |
| randwrite | Not measured | 261.026 MB/s | Not measured | 63,726.942 IOPS | Not measured | 733.184 us |
| randread | 378.062 MB/s | Not measured | 92,300.19 IOPS | Not measured | 501.76 us | Not measured |
| randrw | 216.353 MB/s | 92.82 MB/s | 52,820.506 IOPS | 22,661.045 IOPS | 724.992 us | 577.536 us |
Read, write and mixed workloads are recorded separately. These are medians of measured repetitions.
04 /
Network performance
Source: sfo2 · controlled London endpoints.
| Destination | Download (receiver) | Upload (receiver) | Round-trip mean |
|---|---|---|---|
| London endpoint 1 | 99.77 Mbit/s | 97.292 Mbit/s | 139.054 ms |
| London endpoint 2 | 99.945 Mbit/s | 97.526 Mbit/s | 133.883 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 | 2,208.654 transactions/s | 1.808 ms |
| storage | 1,715.118 transactions/s | 2.329 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
Window1244 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 | sfo2 · detected |
| Plan | c-4 · supplied |
| CPU | Intel(R) Xeon(R) Platinum 8168 CPU @ 2.70GHz |
| 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 | 6343f908ae4f28eb98c261e9c277ed8d7bccaa18952b055d068e1da42f499ab9 |
| Started | 2026-10-17T12:37:59.628Z |
| Finished | 2026-10-17T12:58:43.584Z |
| 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 | 450.03 events/s |
| CPU 4 thread(s) · repetition 1 | passed | Events per second | 1,395.24 events/s |
| CPU 1 thread(s) · repetition 2 | passed | Events per second | 448.53 events/s |
| CPU 4 thread(s) · repetition 2 | passed | Events per second | 1,400.62 events/s |
| CPU 1 thread(s) · repetition 3 | passed | Events per second | 449.66 events/s |
| CPU 4 thread(s) · repetition 3 | passed | Events per second | 1,395.44 events/s |
| gzip fixed corpus · repetition 1 | passed | Compression input throughput | 206.933 MiB/s |
Memory bandwidth
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Memory read · repetition 1 | passed | Bandwidth | 7,561.42 MiB/s |
| Memory write · repetition 1 | passed | Bandwidth | 7,782.88 MiB/s |
| Memory read · repetition 2 | passed | Bandwidth | 7,598.89 MiB/s |
| Memory write · repetition 2 | passed | Bandwidth | 7,789.52 MiB/s |
| Memory read · repetition 3 | passed | Bandwidth | 7,599.74 MiB/s |
| Memory write · repetition 3 | passed | Bandwidth | 7,783.73 MiB/s |
Disk performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Disk write · repetition 1 | passed | write bandwidth | 1,257.837 MB/s |
| Disk write · repetition 1 | passed | write operations | 1,199.567 IOPS |
| Disk write · repetition 1 | passed | write p50 latency | 25,559.04 us |
| Disk write · repetition 1 | passed | write p95 latency | 45,875.2 us |
| Disk write · repetition 1 | passed | write p99 latency | 78,118.912 us |
| Disk read · repetition 1 | passed | read bandwidth | 2,982.32 MB/s |
| Disk read · repetition 1 | passed | read operations | 2,844.162 IOPS |
| Disk read · repetition 1 | passed | read p50 latency | 11,206.656 us |
| Disk read · repetition 1 | passed | read p95 latency | 12,517.376 us |
| Disk read · repetition 1 | passed | read p99 latency | 15,925.248 us |
| Disk randwrite · repetition 1 | passed | write bandwidth | 261.026 MB/s |
| Disk randwrite · repetition 1 | passed | write operations | 63,726.942 IOPS |
| Disk randwrite · repetition 1 | passed | write p50 latency | 477.184 us |
| Disk randwrite · repetition 1 | passed | write p95 latency | 733.184 us |
| Disk randwrite · repetition 1 | passed | write p99 latency | 888.832 us |
| Disk randread · repetition 1 | passed | read bandwidth | 377.664 MB/s |
| Disk randread · repetition 1 | passed | read operations | 92,203.06 IOPS |
| Disk randread · repetition 1 | passed | read p50 latency | 313.344 us |
| Disk randread · repetition 1 | passed | read p95 latency | 501.76 us |
| Disk randread · repetition 1 | passed | read p99 latency | 774.144 us |
| Disk randrw · repetition 1 | passed | read bandwidth | 216.353 MB/s |
| Disk randrw · repetition 1 | passed | read operations | 52,820.506 IOPS |
| Disk randrw · repetition 1 | passed | read p50 latency | 366.592 us |
| Disk randrw · repetition 1 | passed | read p95 latency | 733.184 us |
| Disk randrw · repetition 1 | passed | read p99 latency | 2,605.056 us |
| Disk randrw · repetition 1 | passed | write bandwidth | 92.82 MB/s |
| Disk randrw · repetition 1 | passed | write operations | 22,661.045 IOPS |
| Disk randrw · repetition 1 | passed | write p50 latency | 313.344 us |
| Disk randrw · repetition 1 | passed | write p95 latency | 577.536 us |
| Disk randrw · repetition 1 | passed | write p99 latency | 880.64 us |
| Disk write · repetition 2 | passed | write bandwidth | 1,157.318 MB/s |
| Disk write · repetition 2 | passed | write operations | 1,103.704 IOPS |
| Disk write · repetition 2 | passed | write p50 latency | 27,394.048 us |
| Disk write · repetition 2 | passed | write p95 latency | 57,409.536 us |
| Disk write · repetition 2 | passed | write p99 latency | 95,944.704 us |
| Disk read · repetition 2 | passed | read bandwidth | 2,888.161 MB/s |
| Disk read · repetition 2 | passed | read operations | 2,754.365 IOPS |
| Disk read · repetition 2 | passed | read p50 latency | 12,386.304 us |
| Disk read · repetition 2 | passed | read p95 latency | 14,221.312 us |
| Disk read · repetition 2 | passed | read p99 latency | 19,267.584 us |
| Disk randwrite · repetition 2 | passed | write bandwidth | 258.805 MB/s |
| Disk randwrite · repetition 2 | passed | write operations | 63,184.794 IOPS |
| Disk randwrite · repetition 2 | passed | write p50 latency | 477.184 us |
| Disk randwrite · repetition 2 | passed | write p95 latency | 733.184 us |
| Disk randwrite · repetition 2 | passed | write p99 latency | 897.024 us |
| Disk randread · repetition 2 | passed | read bandwidth | 380.878 MB/s |
| Disk randread · repetition 2 | passed | read operations | 92,987.734 IOPS |
| Disk randread · repetition 2 | passed | read p50 latency | 309.248 us |
| Disk randread · repetition 2 | passed | read p95 latency | 505.856 us |
| Disk randread · repetition 2 | passed | read p99 latency | 659.456 us |
| Disk randrw · repetition 2 | passed | read bandwidth | 219.24 MB/s |
| Disk randrw · repetition 2 | passed | read operations | 53,525.363 IOPS |
| Disk randrw · repetition 2 | passed | read p50 latency | 362.496 us |
| Disk randrw · repetition 2 | passed | read p95 latency | 724.992 us |
| Disk randrw · repetition 2 | passed | read p99 latency | 2,605.056 us |
| Disk randrw · repetition 2 | passed | write bandwidth | 94.051 MB/s |
| Disk randrw · repetition 2 | passed | write operations | 22,961.572 IOPS |
| Disk randrw · repetition 2 | passed | write p50 latency | 309.248 us |
| Disk randrw · repetition 2 | passed | write p95 latency | 561.152 us |
| Disk randrw · repetition 2 | passed | write p99 latency | 864.256 us |
| Disk write · repetition 3 | passed | write bandwidth | 1,168.765 MB/s |
| Disk write · repetition 3 | passed | write operations | 1,114.621 IOPS |
| Disk write · repetition 3 | passed | write p50 latency | 25,821.184 us |
| Disk write · repetition 3 | passed | write p95 latency | 61,079.552 us |
| Disk write · repetition 3 | passed | write p99 latency | 128,450.56 us |
| Disk read · repetition 3 | passed | read bandwidth | 2,961.951 MB/s |
| Disk read · repetition 3 | passed | read operations | 2,824.737 IOPS |
| Disk read · repetition 3 | passed | read p50 latency | 11,206.656 us |
| Disk read · repetition 3 | passed | read p95 latency | 12,779.52 us |
| Disk read · repetition 3 | passed | read p99 latency | 17,956.864 us |
| Disk randwrite · repetition 3 | passed | write bandwidth | 265.293 MB/s |
| Disk randwrite · repetition 3 | passed | write operations | 64,768.774 IOPS |
| Disk randwrite · repetition 3 | passed | write p50 latency | 477.184 us |
| Disk randwrite · repetition 3 | passed | write p95 latency | 733.184 us |
| Disk randwrite · repetition 3 | passed | write p99 latency | 888.832 us |
| Disk randread · repetition 3 | passed | read bandwidth | 378.062 MB/s |
| Disk randread · repetition 3 | passed | read operations | 92,300.19 IOPS |
| Disk randread · repetition 3 | passed | read p50 latency | 317.44 us |
| Disk randread · repetition 3 | passed | read p95 latency | 497.664 us |
| Disk randread · repetition 3 | passed | read p99 latency | 667.648 us |
| Disk randrw · repetition 3 | passed | read bandwidth | 215.112 MB/s |
| Disk randrw · repetition 3 | passed | read operations | 52,517.549 IOPS |
| Disk randrw · repetition 3 | passed | read p50 latency | 366.592 us |
| Disk randrw · repetition 3 | passed | read p95 latency | 724.992 us |
| Disk randrw · repetition 3 | passed | read p99 latency | 2,572.288 us |
| Disk randrw · repetition 3 | passed | write bandwidth | 92.283 MB/s |
| Disk randrw · repetition 3 | passed | write operations | 22,529.916 IOPS |
| Disk randrw · repetition 3 | passed | write p50 latency | 313.344 us |
| Disk randrw · repetition 3 | passed | write p95 latency | 577.536 us |
| Disk randrw · repetition 3 | passed | write p99 latency | 888.832 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 | 97.292 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Sender throughput | 100.072 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Receiver throughput | 99.77 Mbit/s |
| Latency endpoint 1 · repetition 1 | passed | Round-trip mean | 139.054 ms |
| Network upload endpoint 2 · repetition 1 | passed | Sender throughput | 100.156 Mbit/s |
| Network upload endpoint 2 · repetition 1 | passed | Receiver throughput | 97.526 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Sender throughput | 100.126 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Receiver throughput | 99.945 Mbit/s |
| Latency endpoint 2 · repetition 1 | passed | Round-trip mean | 133.883 ms |
PostgreSQL performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| PostgreSQL memory dataset · repetition 1 | passed | Transactions | 2,213.342 transactions/s |
| PostgreSQL memory dataset · repetition 1 | passed | Average latency | 1.804 ms |
| PostgreSQL memory dataset · repetition 2 | passed | Transactions | 2,208.654 transactions/s |
| PostgreSQL memory dataset · repetition 2 | passed | Average latency | 1.808 ms |
| PostgreSQL memory dataset · repetition 3 | passed | Transactions | 2,203.358 transactions/s |
| PostgreSQL memory dataset · repetition 3 | passed | Average latency | 1.812 ms |
| PostgreSQL storage dataset · repetition 1 | passed | Transactions | 1,715.118 transactions/s |
| PostgreSQL storage dataset · repetition 1 | passed | Average latency | 2.329 ms |
| PostgreSQL storage dataset · repetition 2 | passed | Transactions | 1,667.351 transactions/s |
| PostgreSQL storage dataset · repetition 2 | passed | Average latency | 2.396 ms |
| PostgreSQL storage dataset · repetition 3 | passed | Transactions | 1,726.082 transactions/s |
| PostgreSQL storage dataset · repetition 3 | passed | Average latency | 2.314 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.