AI-assisted review

Instance benchmark

Vultr vc2-4c-8gb

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

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4 vCPU7.7 GiB RAMx86_64Silicon Valley, US$40.00 / month

Published report · 17 Oct 2026 · One deployment · 31 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.

417.7events/s
Single thread

1,645events/s
All 4 vCPUs

Events / sec

1 thread
417.7
4 threads
1,645

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

gzip fixed corpus · compression input throughput 206.8 MiB/s · single run.

02 /

Memory bandwidth

sysbench 1.0.20 memory · sequential read and write operations.

Read8,484 MiB/s

Write8,196 MiB/s

CopyNot measured

Throughput (MiB/s)

Read
8,484
Write
8,196
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	547.0 MB/s	78,119 µs
Sequential write	363.4 MB/s	116,916 µs
Random read	61,245 IOPS	847.9 µs
Random write	35,912 IOPS	1,466 µs
Random mix · read	29,491 IOPS	1,794 µs
Random mix · write	12,648 IOPS	1,384 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 · LibreSpeed CLI 1.0.14 · public HTTPS destinations.

Destination	Download	Upload	HTTP latency	HTTP jitter	Loss
Frankfurt, Germany (Clouvider) 17/10/2026, 17:36:33 UTC · Separate VM network-only run · View reviewed run	458.2 Mbit/s	102.9 Mbit/s	144.6 ms	0.39 ms	Not measured
New York, United States (2) (Clouvider) 17/10/2026, 17:36:33 UTC · Separate VM network-only run · View reviewed run	1,368 Mbit/s	262.7 Mbit/s	61.1 ms	0.11 ms	Not measured

One 10-second download and upload per destination, three concurrent streams, IPv4 over HTTPS, with no configured rate limit. HTTP latency and jitter are application-level measurements; packet loss was not measured. These paths do not establish maximum link capacity.

Latest matching published internet speed test for this provider, plan, recorded region and resource class, taken on a separate VM. These values are not measurements from this full benchmark deployment. The original capped iperf path checks remain under Evidence; their values and test window are unchanged.

Browse all network speed tests.

12 GiB outbound-interface abort threshold is sampled; kernel buffering and sampling may overshoot. Retained counters disclose actual observed bytes.

05 /

PostgreSQL performance

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

Dataset profile	Transactions / sec	Average latency	Passed runs
In memory	2,975	1.34 ms	3 of 3 passed
Storage-bound	2,117	1.89 ms	3 of 3 passed

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

Running PostgreSQL yourself? Read our PostgreSQL tutorials.

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 31 min test window, so no time series exists and none is drawn.

Repetition	CPU 1 thread	Memory read	Random read	PostgreSQL
1	417.7 events/s	8,484 MiB/s	61,245 IOPS	2,812 tx/s
2	414.3 events/s	8,495 MiB/s	69,387 IOPS	2,975 tx/s
3	420.3 events/s	8,460 MiB/s	56,757 IOPS	3,088 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

Window31 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 31 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.

Environment and configuration

Recorded field	Value
Provider	Vultr · detected
Region	Silicon Valley, US (SJC) · detected
Plan	vc2-4c-8gb · supplied
List price	$40.00 / month · $0.055 / hour. List price on 17 Oct 2026, USD before tax. Source: Vultr plan catalog (API).
CPU	Intel Xeon Processor (Skylake, IBRS)
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	72886dac270518a1ed0500297796cf6203e66942956f3f31acb03ecc36ba6612
Started	2026-10-17T11:54:35.232Z
Finished	2026-10-17T12:25:51.905Z
Execution status	completed

Historical capped network path checks

Original full benchmark deployment · 17 Oct 2026. These controlled iperf path checks used a 100 Mbit/s rate setting and do not measure internet speed or maximum link capacity. RTT is the probe mean; jitter and packet loss were not measured. The original report JSON retains these measurements.

Controlled destination	Download	Upload	RTT	Jitter	Loss
London endpoint 1	99.8 Mbit/s	97.5 Mbit/s	136.2 ms	—	—
London endpoint 2	99.9 Mbit/s	97.5 Mbit/s	135.8 ms	—	—

Every measured repetition and outcome

CPU performance

Workload / repetition	Outcome	Metric	Value
CPU 1 thread(s) · repetition 1	passed	Events per second	417.7 events/s
CPU 4 thread(s) · repetition 1	passed	Events per second	1,670 events/s
CPU 1 thread(s) · repetition 2	passed	Events per second	414.3 events/s
CPU 4 thread(s) · repetition 2	passed	Events per second	1,620 events/s
CPU 1 thread(s) · repetition 3	passed	Events per second	420.3 events/s
CPU 4 thread(s) · repetition 3	passed	Events per second	1,645 events/s
gzip fixed corpus · repetition 1	passed	Compression input throughput	206.8 MiB/s

Memory bandwidth

Workload / repetition	Outcome	Metric	Value
Memory read · repetition 1	passed	Bandwidth	8,484 MiB/s
Memory write · repetition 1	passed	Bandwidth	8,143 MiB/s
Memory read · repetition 2	passed	Bandwidth	8,495 MiB/s
Memory write · repetition 2	passed	Bandwidth	8,320 MiB/s
Memory read · repetition 3	passed	Bandwidth	8,460 MiB/s
Memory write · repetition 3	passed	Bandwidth	8,196 MiB/s

Disk performance

Workload / repetition	Outcome	Metric	Value
Disk write · repetition 1	passed	write bandwidth	341.0 MB/s
Disk write · repetition 1	passed	write operations	325.2 IOPS
Disk write · repetition 1	passed	write p50 latency	95,945 µs
Disk write · repetition 1	passed	write p95 latency	131,596 µs
Disk write · repetition 1	passed	write p99 latency	158,335 µs
Disk read · repetition 1	passed	read bandwidth	508.3 MB/s
Disk read · repetition 1	passed	read operations	484.7 IOPS
Disk read · repetition 1	passed	read p50 latency	61,604 µs
Disk read · repetition 1	passed	read p95 latency	91,750 µs
Disk read · repetition 1	passed	read p99 latency	101,188 µs
Disk randwrite · repetition 1	passed	write bandwidth	147.1 MB/s
Disk randwrite · repetition 1	passed	write operations	35,912 IOPS
Disk randwrite · repetition 1	passed	write p50 latency	428.0 µs
Disk randwrite · repetition 1	passed	write p95 latency	1,466 µs
Disk randwrite · repetition 1	passed	write p99 latency	15,401 µs
Disk randread · repetition 1	passed	read bandwidth	250.9 MB/s
Disk randread · repetition 1	passed	read operations	61,245 IOPS
Disk randread · repetition 1	passed	read p50 latency	346.1 µs
Disk randread · repetition 1	passed	read p95 latency	585.7 µs
Disk randread · repetition 1	passed	read p99 latency	2,572 µs
Disk randrw · repetition 1	passed	read bandwidth	157.5 MB/s
Disk randrw · repetition 1	passed	read operations	38,444 IOPS
Disk randrw · repetition 1	passed	read p50 latency	415.7 µs
Disk randrw · repetition 1	passed	read p95 latency	1,516 µs
Disk randrw · repetition 1	passed	read p99 latency	2,179 µs
Disk randrw · repetition 1	passed	write bandwidth	67.5 MB/s
Disk randrw · repetition 1	passed	write operations	16,482 IOPS
Disk randrw · repetition 1	passed	write p50 latency	342.0 µs
Disk randrw · repetition 1	passed	write p95 latency	1,171 µs
Disk randrw · repetition 1	passed	write p99 latency	5,603 µs
Disk write · repetition 2	passed	write bandwidth	369.2 MB/s
Disk write · repetition 2	passed	write operations	352.1 IOPS
Disk write · repetition 2	passed	write p50 latency	88,605 µs
Disk write · repetition 2	passed	write p95 latency	113,770 µs
Disk write · repetition 2	passed	write p99 latency	141,558 µs
Disk read · repetition 2	passed	read bandwidth	552.5 MB/s
Disk read · repetition 2	passed	read operations	526.9 IOPS
Disk read · repetition 2	passed	read p50 latency	60,031 µs
Disk read · repetition 2	passed	read p95 latency	70,779 µs
Disk read · repetition 2	passed	read p99 latency	84,410 µs
Disk randwrite · repetition 2	passed	write bandwidth	162.2 MB/s
Disk randwrite · repetition 2	passed	write operations	39,593 IOPS
Disk randwrite · repetition 2	passed	write p50 latency	419.8 µs
Disk randwrite · repetition 2	passed	write p95 latency	1,384 µs
Disk randwrite · repetition 2	passed	write p99 latency	13,042 µs
Disk randread · repetition 2	passed	read bandwidth	284.2 MB/s
Disk randread · repetition 2	passed	read operations	69,387 IOPS
Disk randread · repetition 2	passed	read p50 latency	354.3 µs
Disk randread · repetition 2	passed	read p95 latency	847.9 µs
Disk randread · repetition 2	passed	read p99 latency	1,122 µs
Disk randrw · repetition 2	passed	read bandwidth	120.8 MB/s
Disk randrw · repetition 2	passed	read operations	29,491 IOPS
Disk randrw · repetition 2	passed	read p50 latency	536.6 µs
Disk randrw · repetition 2	passed	read p95 latency	1,794 µs
Disk randrw · repetition 2	passed	read p99 latency	2,769 µs
Disk randrw · repetition 2	passed	write bandwidth	51.8 MB/s
Disk randrw · repetition 2	passed	write operations	12,648 IOPS
Disk randrw · repetition 2	passed	write p50 latency	419.8 µs
Disk randrw · repetition 2	passed	write p95 latency	1,384 µs
Disk randrw · repetition 2	passed	write p99 latency	5,145 µs
Disk write · repetition 3	passed	write bandwidth	363.4 MB/s
Disk write · repetition 3	passed	write operations	346.5 IOPS
Disk write · repetition 3	passed	write p50 latency	89,653 µs
Disk write · repetition 3	passed	write p95 latency	116,916 µs
Disk write · repetition 3	passed	write p99 latency	141,558 µs
Disk read · repetition 3	passed	read bandwidth	547.0 MB/s
Disk read · repetition 3	passed	read operations	521.6 IOPS
Disk read · repetition 3	passed	read p50 latency	60,031 µs
Disk read · repetition 3	passed	read p95 latency	78,119 µs
Disk read · repetition 3	passed	read p99 latency	92,799 µs
Disk randwrite · repetition 3	passed	write bandwidth	134.5 MB/s
Disk randwrite · repetition 3	passed	write operations	32,840 IOPS
Disk randwrite · repetition 3	passed	write p50 latency	536.6 µs
Disk randwrite · repetition 3	passed	write p95 latency	2,179 µs
Disk randwrite · repetition 3	passed	write p99 latency	12,517 µs
Disk randread · repetition 3	passed	read bandwidth	232.5 MB/s
Disk randread · repetition 3	passed	read operations	56,757 IOPS
Disk randread · repetition 3	passed	read p50 latency	391.2 µs
Disk randread · repetition 3	passed	read p95 latency	978.9 µs
Disk randread · repetition 3	passed	read p99 latency	2,089 µs
Disk randrw · repetition 3	passed	read bandwidth	120.5 MB/s
Disk randrw · repetition 3	passed	read operations	29,407 IOPS
Disk randrw · repetition 3	passed	read p50 latency	544.8 µs
Disk randrw · repetition 3	passed	read p95 latency	1,827 µs
Disk randrw · repetition 3	passed	read p99 latency	2,802 µs
Disk randrw · repetition 3	passed	write bandwidth	51.7 MB/s
Disk randrw · repetition 3	passed	write operations	12,610 IOPS
Disk randrw · repetition 3	passed	write p50 latency	428.0 µs
Disk randrw · repetition 3	passed	write p95 latency	1,450 µs
Disk randrw · repetition 3	passed	write p99 latency	6,455 µs

Network performance

Workload / repetition	Outcome	Metric	Value
Network upload endpoint 1 · repetition 1	passed	Sender throughput	100.1 Mbit/s
Network upload endpoint 1 · repetition 1	passed	Receiver throughput	97.5 Mbit/s
Network download endpoint 1 · repetition 1	passed	Sender throughput	100.0 Mbit/s
Network download endpoint 1 · repetition 1	passed	Receiver throughput	99.8 Mbit/s
Latency endpoint 1 · repetition 1	passed	Round-trip mean	136.2 ms
Network upload endpoint 2 · repetition 1	passed	Sender throughput	100.1 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	135.8 ms

PostgreSQL performance

Workload / repetition	Outcome	Metric	Value
PostgreSQL memory dataset · repetition 1	passed	Transactions	2,812 tx/s
PostgreSQL memory dataset · repetition 1	passed	Average latency	1.42 ms
PostgreSQL memory dataset · repetition 2	passed	Transactions	2,975 tx/s
PostgreSQL memory dataset · repetition 2	passed	Average latency	1.34 ms
PostgreSQL memory dataset · repetition 3	passed	Transactions	3,088 tx/s
PostgreSQL memory dataset · repetition 3	passed	Average latency	1.29 ms
PostgreSQL storage dataset · repetition 1	passed	Transactions	2,039 tx/s
PostgreSQL storage dataset · repetition 1	passed	Average latency	1.96 ms
PostgreSQL storage dataset · repetition 2	passed	Transactions	2,296 tx/s
PostgreSQL storage dataset · repetition 2	passed	Average latency	1.74 ms
PostgreSQL storage dataset · repetition 3	passed	Transactions	2,117 tx/s
PostgreSQL storage dataset · repetition 3	passed	Average latency	1.89 ms

Consistency over time

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