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 · 60 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.

1,642events/s
Single thread

6,540events/s
All 4 vCPUs

Events / sec

1 thread
1,642
4 threads
6,540

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

gzip fixed corpus · compression input throughput 242.2 MiB/s · single run.

02 /

Memory bandwidth

sysbench 1.0.20 memory · sequential read and write operations.

Read33,092 MiB/s

Write23,794 MiB/s

CopyNot measured

Throughput (MiB/s)

Read
33,092
Write
23,794
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	3,447 MB/s	19,005 µs
Sequential write	1,146 MB/s	52,167 µs
Random read	110,878 IOPS	378.9 µs
Random write	90,770 IOPS	522.2 µs
Random mix · read	70,802 IOPS	452.6 µs
Random mix · write	30,355 IOPS	399.4 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	97.6 Mbit/s	136.0 ms	—	—
London endpoint 2	99.9 Mbit/s	97.5 Mbit/s	136.2 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	5,136	0.78 ms	3 of 3 passed
Storage-bound	3,925	1.02 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 60 min test window, so no time series exists and none is drawn.

Repetition	CPU 1 thread	Memory read	Random read	PostgreSQL
1	1,640 events/s	33,092 MiB/s	109,750 IOPS	5,136 tx/s
2	1,649 events/s	33,059 MiB/s	110,878 IOPS	4,788 tx/s
3	1,642 events/s	33,377 MiB/s	111,968 IOPS	5,174 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

Window60 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 60 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-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	2026-10-17T11:42:24.232Z
Finished	2026-10-17T12:42:30.087Z
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	1,640 events/s
CPU 4 thread(s) · repetition 1	passed	Events per second	6,540 events/s
CPU 1 thread(s) · repetition 2	passed	Events per second	1,649 events/s
CPU 4 thread(s) · repetition 2	passed	Events per second	6,553 events/s
CPU 1 thread(s) · repetition 3	passed	Events per second	1,642 events/s
CPU 4 thread(s) · repetition 3	passed	Events per second	6,537 events/s
gzip fixed corpus · repetition 1	passed	Compression input throughput	242.2 MiB/s

Memory bandwidth

Workload / repetition	Outcome	Metric	Value
Memory read · repetition 1	passed	Bandwidth	33,092 MiB/s
Memory write · repetition 1	passed	Bandwidth	23,794 MiB/s
Memory read · repetition 2	passed	Bandwidth	33,059 MiB/s
Memory write · repetition 2	passed	Bandwidth	23,745 MiB/s
Memory read · repetition 3	passed	Bandwidth	33,377 MiB/s
Memory write · repetition 3	passed	Bandwidth	24,074 MiB/s

Disk performance

Workload / repetition	Outcome	Metric	Value
Disk write · repetition 1	passed	write bandwidth	1,146 MB/s
Disk write · repetition 1	passed	write operations	1,093 IOPS
Disk write · repetition 1	passed	write p50 latency	26,083 µs
Disk write · repetition 1	passed	write p95 latency	52,167 µs
Disk write · repetition 1	passed	write p99 latency	76,022 µs
Disk read · repetition 1	passed	read bandwidth	3,560 MB/s
Disk read · repetition 1	passed	read operations	3,395 IOPS
Disk read · repetition 1	passed	read p50 latency	8,454 µs
Disk read · repetition 1	passed	read p95 latency	18,481 µs
Disk read · repetition 1	passed	read p99 latency	24,248 µs
Disk randwrite · repetition 1	passed	write bandwidth	371.8 MB/s
Disk randwrite · repetition 1	passed	write operations	90,760 IOPS
Disk randwrite · repetition 1	passed	write p50 latency	342.0 µs
Disk randwrite · repetition 1	passed	write p95 latency	528.4 µs
Disk randwrite · repetition 1	passed	write p99 latency	610.3 µs
Disk randread · repetition 1	passed	read bandwidth	449.5 MB/s
Disk randread · repetition 1	passed	read operations	109,750 IOPS
Disk randread · repetition 1	passed	read p50 latency	280.6 µs
Disk randread · repetition 1	passed	read p95 latency	383.0 µs
Disk randread · repetition 1	passed	read p99 latency	448.5 µs
Disk randrw · repetition 1	passed	read bandwidth	290.0 MB/s
Disk randrw · repetition 1	passed	read operations	70,802 IOPS
Disk randrw · repetition 1	passed	read p50 latency	321.5 µs
Disk randrw · repetition 1	passed	read p95 latency	448.5 µs
Disk randrw · repetition 1	passed	read p99 latency	528.4 µs
Disk randrw · repetition 1	passed	write bandwidth	124.3 MB/s
Disk randrw · repetition 1	passed	write operations	30,355 IOPS
Disk randrw · repetition 1	passed	write p50 latency	259.1 µs
Disk randrw · repetition 1	passed	write p95 latency	403.5 µs
Disk randrw · repetition 1	passed	write p99 latency	514.0 µs
Disk write · repetition 2	passed	write bandwidth	780.7 MB/s
Disk write · repetition 2	passed	write operations	744.5 IOPS
Disk write · repetition 2	passed	write p50 latency	41,157 µs
Disk write · repetition 2	passed	write p95 latency	68,682 µs
Disk write · repetition 2	passed	write p99 latency	91,750 µs
Disk read · repetition 2	passed	read bandwidth	3,447 MB/s
Disk read · repetition 2	passed	read operations	3,288 IOPS
Disk read · repetition 2	passed	read p50 latency	8,716 µs
Disk read · repetition 2	passed	read p95 latency	19,005 µs
Disk read · repetition 2	passed	read p99 latency	25,559 µs
Disk randwrite · repetition 2	passed	write bandwidth	371.8 MB/s
Disk randwrite · repetition 2	passed	write operations	90,770 IOPS
Disk randwrite · repetition 2	passed	write p50 latency	342.0 µs
Disk randwrite · repetition 2	passed	write p95 latency	522.2 µs
Disk randwrite · repetition 2	passed	write p99 latency	602.1 µs
Disk randread · repetition 2	passed	read bandwidth	454.2 MB/s
Disk randread · repetition 2	passed	read operations	110,878 IOPS
Disk randread · repetition 2	passed	read p50 latency	280.6 µs
Disk randread · repetition 2	passed	read p95 latency	378.9 µs
Disk randread · repetition 2	passed	read p99 latency	432.1 µs
Disk randrw · repetition 2	passed	read bandwidth	290.4 MB/s
Disk randrw · repetition 2	passed	read operations	70,901 IOPS
Disk randrw · repetition 2	passed	read p50 latency	321.5 µs
Disk randrw · repetition 2	passed	read p95 latency	452.6 µs
Disk randrw · repetition 2	passed	read p99 latency	536.6 µs
Disk randrw · repetition 2	passed	write bandwidth	124.5 MB/s
Disk randrw · repetition 2	passed	write operations	30,399 IOPS
Disk randrw · repetition 2	passed	write p50 latency	257.0 µs
Disk randrw · repetition 2	passed	write p95 latency	399.4 µs
Disk randrw · repetition 2	passed	write p99 latency	510.0 µs
Disk write · repetition 3	passed	write bandwidth	1,194 MB/s
Disk write · repetition 3	passed	write operations	1,139 IOPS
Disk write · repetition 3	passed	write p50 latency	25,297 µs
Disk write · repetition 3	passed	write p95 latency	49,545 µs
Disk write · repetition 3	passed	write p99 latency	70,779 µs
Disk read · repetition 3	passed	read bandwidth	2,455 MB/s
Disk read · repetition 3	passed	read operations	2,341 IOPS
Disk read · repetition 3	passed	read p50 latency	12,648 µs
Disk read · repetition 3	passed	read p95 latency	23,986 µs
Disk read · repetition 3	passed	read p99 latency	29,753 µs
Disk randwrite · repetition 3	passed	write bandwidth	382.6 MB/s
Disk randwrite · repetition 3	passed	write operations	93,399 IOPS
Disk randwrite · repetition 3	passed	write p50 latency	333.8 µs
Disk randwrite · repetition 3	passed	write p95 latency	501.8 µs
Disk randwrite · repetition 3	passed	write p99 latency	569.3 µs
Disk randread · repetition 3	passed	read bandwidth	458.6 MB/s
Disk randread · repetition 3	passed	read operations	111,968 IOPS
Disk randread · repetition 3	passed	read p50 latency	276.5 µs
Disk randread · repetition 3	passed	read p95 latency	374.8 µs
Disk randread · repetition 3	passed	read p99 latency	423.9 µs
Disk randrw · repetition 3	passed	read bandwidth	289.3 MB/s
Disk randrw · repetition 3	passed	read operations	70,623 IOPS
Disk randrw · repetition 3	passed	read p50 latency	321.5 µs
Disk randrw · repetition 3	passed	read p95 latency	452.6 µs
Disk randrw · repetition 3	passed	read p99 latency	528.4 µs
Disk randrw · repetition 3	passed	write bandwidth	124.0 MB/s
Disk randrw · repetition 3	passed	write operations	30,279 IOPS
Disk randrw · repetition 3	passed	write p50 latency	257.0 µs
Disk randrw · repetition 3	passed	write p95 latency	399.4 µs
Disk randrw · repetition 3	passed	write p99 latency	501.8 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	97.6 Mbit/s
Network download endpoint 1 · repetition 1	passed	Sender throughput	100.0 Mbit/s
Network download endpoint 1 · repetition 1	passed	Receiver throughput	99.9 Mbit/s
Latency endpoint 1 · repetition 1	passed	Round-trip mean	136.0 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	136.2 ms

PostgreSQL performance

Workload / repetition	Outcome	Metric	Value
PostgreSQL memory dataset · repetition 1	passed	Transactions	5,136 tx/s
PostgreSQL memory dataset · repetition 1	passed	Average latency	0.78 ms
PostgreSQL memory dataset · repetition 2	passed	Transactions	4,788 tx/s
PostgreSQL memory dataset · repetition 2	passed	Average latency	0.83 ms
PostgreSQL memory dataset · repetition 3	passed	Transactions	5,174 tx/s
PostgreSQL memory dataset · repetition 3	passed	Average latency	0.77 ms
PostgreSQL storage dataset · repetition 1	passed	Transactions	4,055 tx/s
PostgreSQL storage dataset · repetition 1	passed	Average latency	0.99 ms
PostgreSQL storage dataset · repetition 2	passed	Transactions	3,870 tx/s
PostgreSQL storage dataset · repetition 2	passed	Average latency	1.03 ms
PostgreSQL storage dataset · repetition 3	passed	Transactions	3,925 tx/s
PostgreSQL storage dataset · repetition 3	passed	Average latency	1.02 ms

Consistency over time

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