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.
448.17events/s
1 threads
1 threads
1,400.82events/s
4 threads
4 threads
- 1 threads448.17
- 4 threads1,400.82
Within-run medians; thread counts retain their recorded allocation.
Compression · 207.09 MiB/s · passed
02 /
Memory bandwidth
Sequential read and write · recorded sysbench workload.
Read8,537.37 MiB/s
Write8,471.29 MiB/s
- Read8,537.37
- Write8,471.29
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 | 725.247 MB/s | Not measured | 691.65 IOPS | Not measured | 87,556.096 us |
| read | 2,642.753 MB/s | Not measured | 2,520.325 IOPS | Not measured | 19,267.584 us | Not measured |
| randwrite | Not measured | 272.929 MB/s | Not measured | 66,632.946 IOPS | Not measured | 692.224 us |
| randread | 389.578 MB/s | Not measured | 95,111.696 IOPS | Not measured | 468.992 us | Not measured |
| randrw | 229.361 MB/s | 98.354 MB/s | 55,996.267 IOPS | 24,012.099 IOPS | 716.8 us | 493.568 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 | 99.945 Mbit/s | 97.414 Mbit/s | 139.083 ms |
| London endpoint 2 | 99.946 Mbit/s | 97.545 Mbit/s | 132.602 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 | 2,088.974 transactions/s | 1.912 ms |
| storage | 1,654.212 transactions/s | 2.415 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
Window1309 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 | c3eb2e7c01f15159032aac93c308aed89ee9645289179752f5a4b9d183a6e775 |
| Started | 2026-10-17T12:38:04.885Z |
| Finished | 2026-10-17T12:59:54.305Z |
| 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 | 448.17 events/s |
| CPU 4 thread(s) · repetition 1 | passed | Events per second | 1,405.87 events/s |
| CPU 1 thread(s) · repetition 2 | passed | Events per second | 448.98 events/s |
| CPU 4 thread(s) · repetition 2 | passed | Events per second | 1,394.49 events/s |
| CPU 1 thread(s) · repetition 3 | passed | Events per second | 446.89 events/s |
| CPU 4 thread(s) · repetition 3 | passed | Events per second | 1,400.82 events/s |
| gzip fixed corpus · repetition 1 | passed | Compression input throughput | 207.09 MiB/s |
Memory bandwidth
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Memory read · repetition 1 | passed | Bandwidth | 8,552.4 MiB/s |
| Memory write · repetition 1 | passed | Bandwidth | 8,373.56 MiB/s |
| Memory read · repetition 2 | passed | Bandwidth | 8,537.37 MiB/s |
| Memory write · repetition 2 | passed | Bandwidth | 8,512.12 MiB/s |
| Memory read · repetition 3 | passed | Bandwidth | 8,516.62 MiB/s |
| Memory write · repetition 3 | passed | Bandwidth | 8,471.29 MiB/s |
Disk performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Disk write · repetition 1 | passed | write bandwidth | 725.247 MB/s |
| Disk write · repetition 1 | passed | write operations | 691.65 IOPS |
| Disk write · repetition 1 | passed | write p50 latency | 42,729.472 us |
| Disk write · repetition 1 | passed | write p95 latency | 87,556.096 us |
| Disk write · repetition 1 | passed | write p99 latency | 125,304.832 us |
| Disk read · repetition 1 | passed | read bandwidth | 2,610.137 MB/s |
| Disk read · repetition 1 | passed | read operations | 2,489.221 IOPS |
| Disk read · repetition 1 | passed | read p50 latency | 11,993.088 us |
| Disk read · repetition 1 | passed | read p95 latency | 20,054.016 us |
| Disk read · repetition 1 | passed | read p99 latency | 30,277.632 us |
| Disk randwrite · repetition 1 | passed | write bandwidth | 272.929 MB/s |
| Disk randwrite · repetition 1 | passed | write operations | 66,632.946 IOPS |
| Disk randwrite · repetition 1 | passed | write p50 latency | 460.8 us |
| Disk randwrite · repetition 1 | passed | write p95 latency | 692.224 us |
| Disk randwrite · repetition 1 | passed | write p99 latency | 847.872 us |
| Disk randread · repetition 1 | passed | read bandwidth | 374.664 MB/s |
| Disk randread · repetition 1 | passed | read operations | 91,470.618 IOPS |
| Disk randread · repetition 1 | passed | read p50 latency | 301.056 us |
| Disk randread · repetition 1 | passed | read p95 latency | 518.144 us |
| Disk randread · repetition 1 | passed | read p99 latency | 1,318.912 us |
| Disk randrw · repetition 1 | passed | read bandwidth | 230.052 MB/s |
| Disk randrw · repetition 1 | passed | read operations | 56,165.05 IOPS |
| Disk randrw · repetition 1 | passed | read p50 latency | 342.016 us |
| Disk randrw · repetition 1 | passed | read p95 latency | 716.8 us |
| Disk randrw · repetition 1 | passed | read p99 latency | 2,736.128 us |
| Disk randrw · repetition 1 | passed | write bandwidth | 98.644 MB/s |
| Disk randrw · repetition 1 | passed | write operations | 24,082.992 IOPS |
| Disk randrw · repetition 1 | passed | write p50 latency | 292.864 us |
| Disk randrw · repetition 1 | passed | write p95 latency | 493.568 us |
| Disk randrw · repetition 1 | passed | write p99 latency | 962.56 us |
| Disk write · repetition 2 | passed | write bandwidth | 573.074 MB/s |
| Disk write · repetition 2 | passed | write operations | 546.526 IOPS |
| Disk write · repetition 2 | passed | write p50 latency | 49,545.216 us |
| Disk write · repetition 2 | passed | write p95 latency | 135,266.304 us |
| Disk write · repetition 2 | passed | write p99 latency | 229,638.144 us |
| Disk read · repetition 2 | passed | read bandwidth | 2,762.697 MB/s |
| Disk read · repetition 2 | passed | read operations | 2,634.713 IOPS |
| Disk read · repetition 2 | passed | read p50 latency | 11,468.8 us |
| Disk read · repetition 2 | passed | read p95 latency | 19,267.584 us |
| Disk read · repetition 2 | passed | read p99 latency | 25,559.04 us |
| Disk randwrite · repetition 2 | passed | write bandwidth | 277.789 MB/s |
| Disk randwrite · repetition 2 | passed | write operations | 67,819.606 IOPS |
| Disk randwrite · repetition 2 | passed | write p50 latency | 456.704 us |
| Disk randwrite · repetition 2 | passed | write p95 latency | 684.032 us |
| Disk randwrite · repetition 2 | passed | write p99 latency | 815.104 us |
| Disk randread · repetition 2 | passed | read bandwidth | 400.876 MB/s |
| Disk randread · repetition 2 | passed | read operations | 97,870.238 IOPS |
| Disk randread · repetition 2 | passed | read p50 latency | 301.056 us |
| Disk randread · repetition 2 | passed | read p95 latency | 464.896 us |
| Disk randread · repetition 2 | passed | read p99 latency | 692.224 us |
| Disk randrw · repetition 2 | passed | read bandwidth | 227.258 MB/s |
| Disk randrw · repetition 2 | passed | read operations | 55,482.934 IOPS |
| Disk randrw · repetition 2 | passed | read p50 latency | 342.016 us |
| Disk randrw · repetition 2 | passed | read p95 latency | 708.608 us |
| Disk randrw · repetition 2 | passed | read p99 latency | 2,703.36 us |
| Disk randrw · repetition 2 | passed | write bandwidth | 97.459 MB/s |
| Disk randrw · repetition 2 | passed | write operations | 23,793.614 IOPS |
| Disk randrw · repetition 2 | passed | write p50 latency | 292.864 us |
| Disk randrw · repetition 2 | passed | write p95 latency | 493.568 us |
| Disk randrw · repetition 2 | passed | write p99 latency | 987.136 us |
| Disk write · repetition 3 | passed | write bandwidth | 804.677 MB/s |
| Disk write · repetition 3 | passed | write operations | 767.4 IOPS |
| Disk write · repetition 3 | passed | write p50 latency | 39,059.456 us |
| Disk write · repetition 3 | passed | write p95 latency | 85,458.944 us |
| Disk write · repetition 3 | passed | write p99 latency | 133,693.44 us |
| Disk read · repetition 3 | passed | read bandwidth | 2,642.753 MB/s |
| Disk read · repetition 3 | passed | read operations | 2,520.325 IOPS |
| Disk read · repetition 3 | passed | read p50 latency | 11,862.016 us |
| Disk read · repetition 3 | passed | read p95 latency | 19,267.584 us |
| Disk read · repetition 3 | passed | read p99 latency | 30,015.488 us |
| Disk randwrite · repetition 3 | passed | write bandwidth | 241.903 MB/s |
| Disk randwrite · repetition 3 | passed | write operations | 59,058.465 IOPS |
| Disk randwrite · repetition 3 | passed | write p50 latency | 456.704 us |
| Disk randwrite · repetition 3 | passed | write p95 latency | 700.416 us |
| Disk randwrite · repetition 3 | passed | write p99 latency | 1,302.528 us |
| Disk randread · repetition 3 | passed | read bandwidth | 389.578 MB/s |
| Disk randread · repetition 3 | passed | read operations | 95,111.696 IOPS |
| Disk randread · repetition 3 | passed | read p50 latency | 305.152 us |
| Disk randread · repetition 3 | passed | read p95 latency | 468.992 us |
| Disk randread · repetition 3 | passed | read p99 latency | 1,253.376 us |
| Disk randrw · repetition 3 | passed | read bandwidth | 229.361 MB/s |
| Disk randrw · repetition 3 | passed | read operations | 55,996.267 IOPS |
| Disk randrw · repetition 3 | passed | read p50 latency | 342.016 us |
| Disk randrw · repetition 3 | passed | read p95 latency | 741.376 us |
| Disk randrw · repetition 3 | passed | read p99 latency | 2,703.36 us |
| Disk randrw · repetition 3 | passed | write bandwidth | 98.354 MB/s |
| Disk randrw · repetition 3 | passed | write operations | 24,012.099 IOPS |
| Disk randrw · repetition 3 | passed | write p50 latency | 292.864 us |
| Disk randrw · repetition 3 | passed | write p95 latency | 501.76 us |
| Disk randrw · repetition 3 | passed | write p99 latency | 970.752 us |
Network performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| Network upload endpoint 1 · repetition 1 | passed | Sender throughput | 100.158 Mbit/s |
| Network upload endpoint 1 · repetition 1 | passed | Receiver throughput | 97.414 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Sender throughput | 100.029 Mbit/s |
| Network download endpoint 1 · repetition 1 | passed | Receiver throughput | 99.945 Mbit/s |
| Latency endpoint 1 · repetition 1 | passed | Round-trip mean | 139.083 ms |
| Network upload endpoint 2 · repetition 1 | passed | Sender throughput | 100.157 Mbit/s |
| Network upload endpoint 2 · repetition 1 | passed | Receiver throughput | 97.545 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Sender throughput | 99.991 Mbit/s |
| Network download endpoint 2 · repetition 1 | passed | Receiver throughput | 99.946 Mbit/s |
| Latency endpoint 2 · repetition 1 | passed | Round-trip mean | 132.602 ms |
PostgreSQL performance
| Workload / repetition | Outcome | Metric | Value |
|---|---|---|---|
| PostgreSQL memory dataset · repetition 1 | passed | Transactions | 2,155.625 transactions/s |
| PostgreSQL memory dataset · repetition 1 | passed | Average latency | 1.853 ms |
| PostgreSQL memory dataset · repetition 2 | passed | Transactions | 2,088.974 transactions/s |
| PostgreSQL memory dataset · repetition 2 | passed | Average latency | 1.912 ms |
| PostgreSQL memory dataset · repetition 3 | passed | Transactions | 2,019.341 transactions/s |
| PostgreSQL memory dataset · repetition 3 | passed | Average latency | 1.978 ms |
| PostgreSQL storage dataset · repetition 1 | passed | Transactions | 1,626.803 transactions/s |
| PostgreSQL storage dataset · repetition 1 | passed | Average latency | 2.456 ms |
| PostgreSQL storage dataset · repetition 2 | passed | Transactions | 1,658.413 transactions/s |
| PostgreSQL storage dataset · repetition 2 | passed | Average latency | 2.409 ms |
| PostgreSQL storage dataset · repetition 3 | passed | Transactions | 1,654.212 transactions/s |
| PostgreSQL storage dataset · repetition 3 | passed | Average latency | 2.415 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.