AI-assisted review

Instance benchmark

Vultr voc-c-4c-8gb-75s-amd

The complete benchmark report. Every workload, in one place.

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4 vCPU7.7 GiB RAMx86_64Silicon Valley, US

Published report · 17 Oct 2026 · One deployment · 61 min test windowUbuntu 24.04.5 · Region SJC · Method pilot-1

All values below are medians of passed runs unless stated otherwise.

01 /

CPU performance

sysbench 1.0.20 prime workload · 1 thread and all 4 vCPUs.

1,671events/s
Single thread

6,580events/s
All 4 vCPUs

Events / sec

1 thread
1,671
4 threads
6,580

Median of 3 passed runs of about 30 seconds per thread count.

gzip fixed corpus · compression input throughput 207.5 MiB/s · single run.

02 /

Memory bandwidth

sysbench 1.0.20 memory · sequential read and write operations.

Read16,940 MiB/s

Write16,189 MiB/s

CopyNot measured

Throughput (MiB/s)

Read
16,940
Write
16,189
Copy
Not measured

Median of 3 passed runs of about 30 seconds per operation. The copy workload is deferred in this methodology.

03 /

Disk performance

fio 3.36 · direct I/O · sequential, random and mixed jobs measured separately.

Workload	Throughput	p95 latency
Sequential read	3,564 MB/s	11,862 µs
Sequential write	2,551 MB/s	17,695 µs
Random read	120,616 IOPS	358.4 µs
Random write	91,073 IOPS	514.0 µs
Random mix · read	72,053 IOPS	456.7 µs
Random mix · write	30,897 IOPS	485.4 µs

Median of 3 passed runs of about 30 seconds per job. The mixed job's reads and writes are listed separately.

04 /

Network performance

Source: Silicon Valley, US · two controlled London endpoints.

Destination	Download	Upload	RTT	Jitter	Loss
London endpoint 1	99.9 Mbit/s	97.5 Mbit/s	136.3 ms	—	—
London endpoint 2	99.9 Mbit/s	97.5 Mbit/s	136.7 ms	—	—

Results describe these measured paths at a 100 Mbit/s rate setting, not maximum link capacity. RTT is the probe mean; jitter and packet loss were not measured.

05 /

PostgreSQL performance

PostgreSQL 16.15 · pgbench · in-memory and storage-bound datasets.

Dataset profile	Transactions / sec	Average latency	Passed runs
In memory	4,446	0.90 ms	3 of 3 passed
Storage-bound	3,863	1.03 ms	3 of 3 passed

Median of 3 passed runs of about 30 seconds per dataset. Latency percentiles were not measured.

06 /

Consistency across runs

One deployment · repeated runs inside the recorded test window.

24-hour consistencyNot measured

Workload skipped · No measured score. This report covers a 61 min test window, so no time series exists and none is drawn.

Repetition	CPU 1 thread	Memory read	Random read	PostgreSQL
1	1,671 events/s	16,940 MiB/s	119,021 IOPS	4,446 tx/s
2	1,673 events/s	17,186 MiB/s	120,616 IOPS	4,366 tx/s
3	1,656 events/s	16,638 MiB/s	121,490 IOPS	4,500 tx/s

Individual runs, not medians. PostgreSQL uses the in-memory dataset. Spread within one test window does not establish long-term consistency.

07 /

Inspect the evidence.

Recorded environment, reviewed measurements and the published snapshot.

OSUbuntu 24.04.5 LTS

Architecturex86_64

Methodpilot-1

Deployments1

Window61 min

report.json

Reviewed, sanitized snapshot: every run, the environment record and all limitations. Raw intake logs remain private.

Read the full methodology

One deployment describes this report, not every server a provider operates.

A 61 min test window does not establish 24-hour consistency or long-term reliability.

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	Silicon Valley, US (SJC) · detected
Plan	voc-c-4c-8gb-75s-amd · supplied
CPU	AMD EPYC-Rome Processor
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	a77dd70195eee967b0e934081e3bd7b4b3b30b7a1557f0c8d8b77cc31f1578c7
Started	2026-10-17T11:42:27.412Z
Finished	2026-10-17T12:43:09.817Z
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	1,671 events/s
CPU 4 thread(s) · repetition 1	passed	Events per second	6,568 events/s
CPU 1 thread(s) · repetition 2	passed	Events per second	1,673 events/s
CPU 4 thread(s) · repetition 2	passed	Events per second	6,580 events/s
CPU 1 thread(s) · repetition 3	passed	Events per second	1,656 events/s
CPU 4 thread(s) · repetition 3	passed	Events per second	6,592 events/s
gzip fixed corpus · repetition 1	passed	Compression input throughput	207.5 MiB/s

Memory bandwidth

Workload / repetition	Outcome	Metric	Value
Memory read · repetition 1	passed	Bandwidth	16,940 MiB/s
Memory write · repetition 1	passed	Bandwidth	16,189 MiB/s
Memory read · repetition 2	passed	Bandwidth	17,186 MiB/s
Memory write · repetition 2	passed	Bandwidth	15,765 MiB/s
Memory read · repetition 3	passed	Bandwidth	16,638 MiB/s
Memory write · repetition 3	passed	Bandwidth	16,204 MiB/s

Disk performance

Workload / repetition	Outcome	Metric	Value
Disk write · repetition 1	passed	write bandwidth	2,551 MB/s
Disk write · repetition 1	passed	write operations	2,433 IOPS
Disk write · repetition 1	passed	write p50 latency	12,780 µs
Disk write · repetition 1	passed	write p95 latency	17,695 µs
Disk write · repetition 1	passed	write p99 latency	21,365 µs
Disk read · repetition 1	passed	read bandwidth	3,563 MB/s
Disk read · repetition 1	passed	read operations	3,398 IOPS
Disk read · repetition 1	passed	read p50 latency	9,372 µs
Disk read · repetition 1	passed	read p95 latency	11,862 µs
Disk read · repetition 1	passed	read p99 latency	13,173 µs
Disk randwrite · repetition 1	passed	write bandwidth	361.7 MB/s
Disk randwrite · repetition 1	passed	write operations	88,299 IOPS
Disk randwrite · repetition 1	passed	write p50 latency	337.9 µs
Disk randwrite · repetition 1	passed	write p95 latency	528.4 µs
Disk randwrite · repetition 1	passed	write p99 latency	733.2 µs
Disk randread · repetition 1	passed	read bandwidth	487.5 MB/s
Disk randread · repetition 1	passed	read operations	119,021 IOPS
Disk randread · repetition 1	passed	read p50 latency	252.9 µs
Disk randread · repetition 1	passed	read p95 latency	366.6 µs
Disk randread · repetition 1	passed	read p99 latency	452.6 µs
Disk randrw · repetition 1	passed	read bandwidth	295.1 MB/s
Disk randrw · repetition 1	passed	read operations	72,053 IOPS
Disk randrw · repetition 1	passed	read p50 latency	288.8 µs
Disk randrw · repetition 1	passed	read p95 latency	452.6 µs
Disk randrw · repetition 1	passed	read p99 latency	610.3 µs
Disk randrw · repetition 1	passed	write bandwidth	126.6 MB/s
Disk randrw · repetition 1	passed	write operations	30,897 IOPS
Disk randrw · repetition 1	passed	write p50 latency	276.5 µs
Disk randrw · repetition 1	passed	write p95 latency	481.3 µs
Disk randrw · repetition 1	passed	write p99 latency	692.2 µs
Disk write · repetition 2	passed	write bandwidth	2,551 MB/s
Disk write · repetition 2	passed	write operations	2,433 IOPS
Disk write · repetition 2	passed	write p50 latency	12,780 µs
Disk write · repetition 2	passed	write p95 latency	17,170 µs
Disk write · repetition 2	passed	write p99 latency	21,103 µs
Disk read · repetition 2	passed	read bandwidth	3,564 MB/s
Disk read · repetition 2	passed	read operations	3,399 IOPS
Disk read · repetition 2	passed	read p50 latency	9,372 µs
Disk read · repetition 2	passed	read p95 latency	11,993 µs
Disk read · repetition 2	passed	read p99 latency	13,304 µs
Disk randwrite · repetition 2	passed	write bandwidth	373.0 MB/s
Disk randwrite · repetition 2	passed	write operations	91,073 IOPS
Disk randwrite · repetition 2	passed	write p50 latency	325.6 µs
Disk randwrite · repetition 2	passed	write p95 latency	514.0 µs
Disk randwrite · repetition 2	passed	write p99 latency	708.6 µs
Disk randread · repetition 2	passed	read bandwidth	494.0 MB/s
Disk randread · repetition 2	passed	read operations	120,616 IOPS
Disk randread · repetition 2	passed	read p50 latency	250.9 µs
Disk randread · repetition 2	passed	read p95 latency	358.4 µs
Disk randread · repetition 2	passed	read p99 latency	428.0 µs
Disk randrw · repetition 2	passed	read bandwidth	291.7 MB/s
Disk randrw · repetition 2	passed	read operations	71,212 IOPS
Disk randrw · repetition 2	passed	read p50 latency	292.9 µs
Disk randrw · repetition 2	passed	read p95 latency	460.8 µs
Disk randrw · repetition 2	passed	read p99 latency	618.5 µs
Disk randrw · repetition 2	passed	write bandwidth	125.1 MB/s
Disk randrw · repetition 2	passed	write operations	30,533 IOPS
Disk randrw · repetition 2	passed	write p50 latency	280.6 µs
Disk randrw · repetition 2	passed	write p95 latency	493.6 µs
Disk randrw · repetition 2	passed	write p99 latency	725.0 µs
Disk write · repetition 3	passed	write bandwidth	2,549 MB/s
Disk write · repetition 3	passed	write operations	2,431 IOPS
Disk write · repetition 3	passed	write p50 latency	12,780 µs
Disk write · repetition 3	passed	write p95 latency	17,695 µs
Disk write · repetition 3	passed	write p99 latency	21,365 µs
Disk read · repetition 3	passed	read bandwidth	3,564 MB/s
Disk read · repetition 3	passed	read operations	3,399 IOPS
Disk read · repetition 3	passed	read p50 latency	9,372 µs
Disk read · repetition 3	passed	read p95 latency	11,731 µs
Disk read · repetition 3	passed	read p99 latency	13,173 µs
Disk randwrite · repetition 3	passed	write bandwidth	390.7 MB/s
Disk randwrite · repetition 3	passed	write operations	95,385 IOPS
Disk randwrite · repetition 3	passed	write p50 latency	309.2 µs
Disk randwrite · repetition 3	passed	write p95 latency	485.4 µs
Disk randwrite · repetition 3	passed	write p99 latency	675.8 µs
Disk randread · repetition 3	passed	read bandwidth	497.6 MB/s
Disk randread · repetition 3	passed	read operations	121,490 IOPS
Disk randread · repetition 3	passed	read p50 latency	248.8 µs
Disk randread · repetition 3	passed	read p95 latency	354.3 µs
Disk randread · repetition 3	passed	read p99 latency	423.9 µs
Disk randrw · repetition 3	passed	read bandwidth	296.0 MB/s
Disk randrw · repetition 3	passed	read operations	72,261 IOPS
Disk randrw · repetition 3	passed	read p50 latency	288.8 µs
Disk randrw · repetition 3	passed	read p95 latency	456.7 µs
Disk randrw · repetition 3	passed	read p99 latency	618.5 µs
Disk randrw · repetition 3	passed	write bandwidth	126.9 MB/s
Disk randrw · repetition 3	passed	write operations	30,986 IOPS
Disk randrw · repetition 3	passed	write p50 latency	272.4 µs
Disk randrw · repetition 3	passed	write p95 latency	485.4 µs
Disk randrw · repetition 3	passed	write p99 latency	708.6 µs

Network performance

Workload / repetition	Outcome	Metric	Value
Network upload endpoint 1 · repetition 1	passed	Sender throughput	100.2 Mbit/s
Network upload endpoint 1 · repetition 1	passed	Receiver throughput	97.5 Mbit/s
Network download endpoint 1 · repetition 1	passed	Sender throughput	100.1 Mbit/s
Network download endpoint 1 · repetition 1	passed	Receiver throughput	99.9 Mbit/s
Latency endpoint 1 · repetition 1	passed	Round-trip mean	136.3 ms
Network upload endpoint 2 · repetition 1	passed	Sender throughput	100.2 Mbit/s
Network upload endpoint 2 · repetition 1	passed	Receiver throughput	97.5 Mbit/s
Network download endpoint 2 · repetition 1	passed	Sender throughput	100.1 Mbit/s
Network download endpoint 2 · repetition 1	passed	Receiver throughput	99.9 Mbit/s
Latency endpoint 2 · repetition 1	passed	Round-trip mean	136.7 ms

PostgreSQL performance

Workload / repetition	Outcome	Metric	Value
PostgreSQL memory dataset · repetition 1	passed	Transactions	4,446 tx/s
PostgreSQL memory dataset · repetition 1	passed	Average latency	0.90 ms
PostgreSQL memory dataset · repetition 2	passed	Transactions	4,366 tx/s
PostgreSQL memory dataset · repetition 2	passed	Average latency	0.91 ms
PostgreSQL memory dataset · repetition 3	passed	Transactions	4,500 tx/s
PostgreSQL memory dataset · repetition 3	passed	Average latency	0.89 ms
PostgreSQL storage dataset · repetition 1	passed	Transactions	3,747 tx/s
PostgreSQL storage dataset · repetition 1	passed	Average latency	1.07 ms
PostgreSQL storage dataset · repetition 2	passed	Transactions	3,920 tx/s
PostgreSQL storage dataset · repetition 2	passed	Average latency	1.02 ms
PostgreSQL storage dataset · repetition 3	passed	Transactions	3,863 tx/s
PostgreSQL storage dataset · repetition 3	passed	Average latency	1.03 ms

Consistency over time

Workload / repetition	Outcome	Metric	Value
24-hour consistency · repetition 1	skipped	No measured score	Not measured