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_64London, UK

Published report · 17 Oct 2026 · One deployment · 57 min test windowUbuntu 24.04.5 · Region LHR · 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

6,656events/s
All 4 vCPUs

Events / sec

1 thread
1,671
4 threads
6,656

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

gzip fixed corpus · compression input throughput 242.1 MiB/s · single run.

02 /

Memory bandwidth

sysbench 1.0.20 memory · sequential read and write operations.

Read36,657 MiB/s

Write25,594 MiB/s

CopyNot measured

Throughput (MiB/s)

Read
36,657
Write
25,594
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	4,197 MB/s	15,139 µs
Sequential write	2,133 MB/s	29,229 µs
Random read	117,225 IOPS	354.3 µs
Random write	99,265 IOPS	452.6 µs
Random mix · read	77,091 IOPS	387.1 µs
Random mix · write	33,055 IOPS	337.9 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: London, UK · two controlled London endpoints.

Destination	Download	Upload	RTT	Jitter	Loss
London endpoint 1	100.1 Mbit/s	100.1 Mbit/s	4.28 ms	—	—
London endpoint 2	100.1 Mbit/s	100.2 Mbit/s	0.39 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	5,451	0.73 ms	3 of 3 passed
Storage-bound	4,492	0.89 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 57 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	36,657 MiB/s	116,891 IOPS	5,349 tx/s
2	1,673 events/s	36,828 MiB/s	117,360 IOPS	5,485 tx/s
3	1,671 events/s	36,459 MiB/s	117,225 IOPS	5,451 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

Window57 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 57 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	London, UK (LHR) · detected
Plan	voc-c-4c-8gb-75s-amd · supplied
CPU	AMD EPYC-Milan 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	c06bb7f1ceae8b8188ca260a103cbaccaab1c5f36b72c34d37b6968e52710924
Started	2026-10-17T11:42:12.594Z
Finished	2026-10-17T12:38:48.941Z
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	6,657 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	6,611 events/s
CPU 1 thread(s) · repetition 3	passed	Events per second	1,671 events/s
CPU 4 thread(s) · repetition 3	passed	Events per second	6,656 events/s
gzip fixed corpus · repetition 1	passed	Compression input throughput	242.1 MiB/s

Memory bandwidth

Workload / repetition	Outcome	Metric	Value
Memory read · repetition 1	passed	Bandwidth	36,657 MiB/s
Memory write · repetition 1	passed	Bandwidth	25,258 MiB/s
Memory read · repetition 2	passed	Bandwidth	36,828 MiB/s
Memory write · repetition 2	passed	Bandwidth	25,594 MiB/s
Memory read · repetition 3	passed	Bandwidth	36,459 MiB/s
Memory write · repetition 3	passed	Bandwidth	25,736 MiB/s

Disk performance

Workload / repetition	Outcome	Metric	Value
Disk write · repetition 1	passed	write bandwidth	3,074 MB/s
Disk write · repetition 1	passed	write operations	2,931 IOPS
Disk write · repetition 1	passed	write p50 latency	9,110 µs
Disk write · repetition 1	passed	write p95 latency	18,481 µs
Disk write · repetition 1	passed	write p99 latency	29,753 µs
Disk read · repetition 1	passed	read bandwidth	4,197 MB/s
Disk read · repetition 1	passed	read operations	4,003 IOPS
Disk read · repetition 1	passed	read p50 latency	7,242 µs
Disk read · repetition 1	passed	read p95 latency	15,139 µs
Disk read · repetition 1	passed	read p99 latency	20,054 µs
Disk randwrite · repetition 1	passed	write bandwidth	404.2 MB/s
Disk randwrite · repetition 1	passed	write operations	98,672 IOPS
Disk randwrite · repetition 1	passed	write p50 latency	321.5 µs
Disk randwrite · repetition 1	passed	write p95 latency	460.8 µs
Disk randwrite · repetition 1	passed	write p99 latency	514.0 µs
Disk randread · repetition 1	passed	read bandwidth	478.8 MB/s
Disk randread · repetition 1	passed	read operations	116,891 IOPS
Disk randread · repetition 1	passed	read p50 latency	264.2 µs
Disk randread · repetition 1	passed	read p95 latency	354.3 µs
Disk randread · repetition 1	passed	read p99 latency	391.2 µs
Disk randrw · repetition 1	passed	read bandwidth	314.9 MB/s
Disk randrw · repetition 1	passed	read operations	76,870 IOPS
Disk randrw · repetition 1	passed	read p50 latency	305.2 µs
Disk randrw · repetition 1	passed	read p95 latency	387.1 µs
Disk randrw · repetition 1	passed	read p99 latency	444.4 µs
Disk randrw · repetition 1	passed	write bandwidth	135.0 MB/s
Disk randrw · repetition 1	passed	write operations	32,960 IOPS
Disk randrw · repetition 1	passed	write p50 latency	238.6 µs
Disk randrw · repetition 1	passed	write p95 latency	337.9 µs
Disk randrw · repetition 1	passed	write p99 latency	415.7 µs
Disk write · repetition 2	passed	write bandwidth	2,072 MB/s
Disk write · repetition 2	passed	write operations	1,976 IOPS
Disk write · repetition 2	passed	write p50 latency	14,877 µs
Disk write · repetition 2	passed	write p95 latency	30,540 µs
Disk write · repetition 2	passed	write p99 latency	39,059 µs
Disk read · repetition 2	passed	read bandwidth	4,500 MB/s
Disk read · repetition 2	passed	read operations	4,291 IOPS
Disk read · repetition 2	passed	read p50 latency	6,717 µs
Disk read · repetition 2	passed	read p95 latency	14,877 µs
Disk read · repetition 2	passed	read p99 latency	19,530 µs
Disk randwrite · repetition 2	passed	write bandwidth	407.0 MB/s
Disk randwrite · repetition 2	passed	write operations	99,374 IOPS
Disk randwrite · repetition 2	passed	write p50 latency	321.5 µs
Disk randwrite · repetition 2	passed	write p95 latency	452.6 µs
Disk randwrite · repetition 2	passed	write p99 latency	501.8 µs
Disk randread · repetition 2	passed	read bandwidth	480.7 MB/s
Disk randread · repetition 2	passed	read operations	117,360 IOPS
Disk randread · repetition 2	passed	read p50 latency	264.2 µs
Disk randread · repetition 2	passed	read p95 latency	354.3 µs
Disk randread · repetition 2	passed	read p99 latency	387.1 µs
Disk randrw · repetition 2	passed	read bandwidth	315.8 MB/s
Disk randrw · repetition 2	passed	read operations	77,091 IOPS
Disk randrw · repetition 2	passed	read p50 latency	301.1 µs
Disk randrw · repetition 2	passed	read p95 latency	387.1 µs
Disk randrw · repetition 2	passed	read p99 latency	448.5 µs
Disk randrw · repetition 2	passed	write bandwidth	135.4 MB/s
Disk randrw · repetition 2	passed	write operations	33,055 IOPS
Disk randrw · repetition 2	passed	write p50 latency	236.5 µs
Disk randrw · repetition 2	passed	write p95 latency	342.0 µs
Disk randrw · repetition 2	passed	write p99 latency	419.8 µs
Disk write · repetition 3	passed	write bandwidth	2,133 MB/s
Disk write · repetition 3	passed	write operations	2,034 IOPS
Disk write · repetition 3	passed	write p50 latency	14,483 µs
Disk write · repetition 3	passed	write p95 latency	29,229 µs
Disk write · repetition 3	passed	write p99 latency	38,535 µs
Disk read · repetition 3	passed	read bandwidth	4,158 MB/s
Disk read · repetition 3	passed	read operations	3,966 IOPS
Disk read · repetition 3	passed	read p50 latency	7,111 µs
Disk read · repetition 3	passed	read p95 latency	16,187 µs
Disk read · repetition 3	passed	read p99 latency	20,840 µs
Disk randwrite · repetition 3	passed	write bandwidth	406.6 MB/s
Disk randwrite · repetition 3	passed	write operations	99,265 IOPS
Disk randwrite · repetition 3	passed	write p50 latency	321.5 µs
Disk randwrite · repetition 3	passed	write p95 latency	452.6 µs
Disk randwrite · repetition 3	passed	write p99 latency	501.8 µs
Disk randread · repetition 3	passed	read bandwidth	480.2 MB/s
Disk randread · repetition 3	passed	read operations	117,225 IOPS
Disk randread · repetition 3	passed	read p50 latency	264.2 µs
Disk randread · repetition 3	passed	read p95 latency	354.3 µs
Disk randread · repetition 3	passed	read p99 latency	387.1 µs
Disk randrw · repetition 3	passed	read bandwidth	316.3 MB/s
Disk randrw · repetition 3	passed	read operations	77,222 IOPS
Disk randrw · repetition 3	passed	read p50 latency	301.1 µs
Disk randrw · repetition 3	passed	read p95 latency	383.0 µs
Disk randrw · repetition 3	passed	read p99 latency	440.3 µs
Disk randrw · repetition 3	passed	write bandwidth	135.6 MB/s
Disk randrw · repetition 3	passed	write operations	33,110 IOPS
Disk randrw · repetition 3	passed	write p50 latency	236.5 µs
Disk randrw · repetition 3	passed	write p95 latency	337.9 µs
Disk randrw · repetition 3	passed	write p99 latency	415.7 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	100.1 Mbit/s
Network download endpoint 1 · repetition 1	passed	Sender throughput	100.1 Mbit/s
Network download endpoint 1 · repetition 1	passed	Receiver throughput	100.1 Mbit/s
Latency endpoint 1 · repetition 1	passed	Round-trip mean	4.28 ms
Network upload endpoint 2 · repetition 1	passed	Sender throughput	100.2 Mbit/s
Network upload endpoint 2 · repetition 1	passed	Receiver throughput	100.2 Mbit/s
Network download endpoint 2 · repetition 1	passed	Sender throughput	100.1 Mbit/s
Network download endpoint 2 · repetition 1	passed	Receiver throughput	100.1 Mbit/s
Latency endpoint 2 · repetition 1	passed	Round-trip mean	0.39 ms

PostgreSQL performance

Workload / repetition	Outcome	Metric	Value
PostgreSQL memory dataset · repetition 1	passed	Transactions	5,349 tx/s
PostgreSQL memory dataset · repetition 1	passed	Average latency	0.75 ms
PostgreSQL memory dataset · repetition 2	passed	Transactions	5,485 tx/s
PostgreSQL memory dataset · repetition 2	passed	Average latency	0.73 ms
PostgreSQL memory dataset · repetition 3	passed	Transactions	5,451 tx/s
PostgreSQL memory dataset · repetition 3	passed	Average latency	0.73 ms
PostgreSQL storage dataset · repetition 1	passed	Transactions	4,541 tx/s
PostgreSQL storage dataset · repetition 1	passed	Average latency	0.88 ms
PostgreSQL storage dataset · repetition 2	passed	Transactions	4,492 tx/s
PostgreSQL storage dataset · repetition 2	passed	Average latency	0.89 ms
PostgreSQL storage dataset · repetition 3	passed	Transactions	4,430 tx/s
PostgreSQL storage dataset · repetition 3	passed	Average latency	0.90 ms

Consistency over time

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