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_64London, UK

Published report · 17 Oct 2026 · One deployment · 36 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.

420.3events/s
Single thread

1,662events/s
All 4 vCPUs

Events / sec

1 thread
420.3
4 threads
1,662

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

gzip fixed corpus · compression input throughput 180.6 MiB/s · single run.

02 /

Memory bandwidth

sysbench 1.0.20 memory · sequential read and write operations.

Read8,432 MiB/s

Write8,455 MiB/s

CopyNot measured

Throughput (MiB/s)

Read
8,432
Write
8,455
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	539.3 MB/s	81,265 µs
Sequential write	484.9 MB/s	93,848 µs
Random read	86,151 IOPS	444.4 µs
Random write	51,114 IOPS	749.6 µs
Random mix · read	47,646 IOPS	1,401 µs
Random mix · write	20,428 IOPS	544.8 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	3.63 ms	—	—
London endpoint 2	100.1 Mbit/s	100.2 Mbit/s	0.41 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	3,295	1.21 ms	3 of 3 passed
Storage-bound	2,577	1.55 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 36 min test window, so no time series exists and none is drawn.

Repetition	CPU 1 thread	Memory read	Random read	PostgreSQL
1	420.3 events/s	8,432 MiB/s	85,750 IOPS	3,335 tx/s
2	423.3 events/s	8,331 MiB/s	86,151 IOPS	3,295 tx/s
3	388.2 events/s	8,551 MiB/s	89,746 IOPS	3,013 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

Window36 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 36 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	vc2-4c-8gb · supplied
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	c06bb7f1ceae8b8188ca260a103cbaccaab1c5f36b72c34d37b6968e52710924
Started	2026-10-17T11:48:08.521Z
Finished	2026-10-17T12:24:26.445Z
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	420.3 events/s
CPU 4 thread(s) · repetition 1	passed	Events per second	1,662 events/s
CPU 1 thread(s) · repetition 2	passed	Events per second	423.3 events/s
CPU 4 thread(s) · repetition 2	passed	Events per second	1,656 events/s
CPU 1 thread(s) · repetition 3	passed	Events per second	388.2 events/s
CPU 4 thread(s) · repetition 3	passed	Events per second	1,668 events/s
gzip fixed corpus · repetition 1	passed	Compression input throughput	180.6 MiB/s

Memory bandwidth

Workload / repetition	Outcome	Metric	Value
Memory read · repetition 1	passed	Bandwidth	8,432 MiB/s
Memory write · repetition 1	passed	Bandwidth	8,455 MiB/s
Memory read · repetition 2	passed	Bandwidth	8,331 MiB/s
Memory write · repetition 2	passed	Bandwidth	8,663 MiB/s
Memory read · repetition 3	passed	Bandwidth	8,551 MiB/s
Memory write · repetition 3	passed	Bandwidth	8,287 MiB/s

Disk performance

Workload / repetition	Outcome	Metric	Value
Disk write · repetition 1	passed	write bandwidth	484.9 MB/s
Disk write · repetition 1	passed	write operations	462.5 IOPS
Disk write · repetition 1	passed	write p50 latency	64,750 µs
Disk write · repetition 1	passed	write p95 latency	93,848 µs
Disk write · repetition 1	passed	write p99 latency	114,819 µs
Disk read · repetition 1	passed	read bandwidth	517.7 MB/s
Disk read · repetition 1	passed	read operations	493.7 IOPS
Disk read · repetition 1	passed	read p50 latency	60,031 µs
Disk read · repetition 1	passed	read p95 latency	88,605 µs
Disk read · repetition 1	passed	read p99 latency	98,042 µs
Disk randwrite · repetition 1	passed	write bandwidth	206.3 MB/s
Disk randwrite · repetition 1	passed	write operations	50,359 IOPS
Disk randwrite · repetition 1	passed	write p50 latency	378.9 µs
Disk randwrite · repetition 1	passed	write p95 latency	749.6 µs
Disk randwrite · repetition 1	passed	write p99 latency	12,386 µs
Disk randread · repetition 1	passed	read bandwidth	351.2 MB/s
Disk randread · repetition 1	passed	read operations	85,750 IOPS
Disk randread · repetition 1	passed	read p50 latency	337.9 µs
Disk randread · repetition 1	passed	read p95 latency	444.4 µs
Disk randread · repetition 1	passed	read p99 latency	602.1 µs
Disk randrw · repetition 1	passed	read bandwidth	185.3 MB/s
Disk randrw · repetition 1	passed	read operations	45,230 IOPS
Disk randrw · repetition 1	passed	read p50 latency	383.0 µs
Disk randrw · repetition 1	passed	read p95 latency	1,434 µs
Disk randrw · repetition 1	passed	read p99 latency	2,146 µs
Disk randrw · repetition 1	passed	write bandwidth	79.5 MB/s
Disk randrw · repetition 1	passed	write operations	19,403 IOPS
Disk randrw · repetition 1	passed	write p50 latency	288.8 µs
Disk randrw · repetition 1	passed	write p95 latency	544.8 µs
Disk randrw · repetition 1	passed	write p99 latency	3,031 µs
Disk write · repetition 2	passed	write bandwidth	482.2 MB/s
Disk write · repetition 2	passed	write operations	459.8 IOPS
Disk write · repetition 2	passed	write p50 latency	62,652 µs
Disk write · repetition 2	passed	write p95 latency	98,042 µs
Disk write · repetition 2	passed	write p99 latency	119,013 µs
Disk read · repetition 2	passed	read bandwidth	539.3 MB/s
Disk read · repetition 2	passed	read operations	514.4 IOPS
Disk read · repetition 2	passed	read p50 latency	60,031 µs
Disk read · repetition 2	passed	read p95 latency	81,265 µs
Disk read · repetition 2	passed	read p99 latency	91,750 µs
Disk randwrite · repetition 2	passed	write bandwidth	209.4 MB/s
Disk randwrite · repetition 2	passed	write operations	51,114 IOPS
Disk randwrite · repetition 2	passed	write p50 latency	383.0 µs
Disk randwrite · repetition 2	passed	write p95 latency	798.7 µs
Disk randwrite · repetition 2	passed	write p99 latency	10,813 µs
Disk randread · repetition 2	passed	read bandwidth	352.9 MB/s
Disk randread · repetition 2	passed	read operations	86,151 IOPS
Disk randread · repetition 2	passed	read p50 latency	354.3 µs
Disk randread · repetition 2	passed	read p95 latency	440.3 µs
Disk randread · repetition 2	passed	read p99 latency	610.3 µs
Disk randrw · repetition 2	passed	read bandwidth	195.2 MB/s
Disk randrw · repetition 2	passed	read operations	47,646 IOPS
Disk randrw · repetition 2	passed	read p50 latency	387.1 µs
Disk randrw · repetition 2	passed	read p95 latency	1,401 µs
Disk randrw · repetition 2	passed	read p99 latency	2,056 µs
Disk randrw · repetition 2	passed	write bandwidth	83.7 MB/s
Disk randrw · repetition 2	passed	write operations	20,428 IOPS
Disk randrw · repetition 2	passed	write p50 latency	292.9 µs
Disk randrw · repetition 2	passed	write p95 latency	553.0 µs
Disk randrw · repetition 2	passed	write p99 latency	1,647 µs
Disk write · repetition 3	passed	write bandwidth	490.1 MB/s
Disk write · repetition 3	passed	write operations	467.4 IOPS
Disk write · repetition 3	passed	write p50 latency	62,652 µs
Disk write · repetition 3	passed	write p95 latency	93,848 µs
Disk write · repetition 3	passed	write p99 latency	111,673 µs
Disk read · repetition 3	passed	read bandwidth	551.3 MB/s
Disk read · repetition 3	passed	read operations	525.7 IOPS
Disk read · repetition 3	passed	read p50 latency	60,031 µs
Disk read · repetition 3	passed	read p95 latency	70,779 µs
Disk read · repetition 3	passed	read p99 latency	86,508 µs
Disk randwrite · repetition 3	passed	write bandwidth	209.7 MB/s
Disk randwrite · repetition 3	passed	write operations	51,189 IOPS
Disk randwrite · repetition 3	passed	write p50 latency	378.9 µs
Disk randwrite · repetition 3	passed	write p95 latency	716.8 µs
Disk randwrite · repetition 3	passed	write p99 latency	10,945 µs
Disk randread · repetition 3	passed	read bandwidth	367.6 MB/s
Disk randread · repetition 3	passed	read operations	89,746 IOPS
Disk randread · repetition 3	passed	read p50 latency	337.9 µs
Disk randread · repetition 3	passed	read p95 latency	456.7 µs
Disk randread · repetition 3	passed	read p99 latency	618.5 µs
Disk randrw · repetition 3	passed	read bandwidth	198.0 MB/s
Disk randrw · repetition 3	passed	read operations	48,337 IOPS
Disk randrw · repetition 3	passed	read p50 latency	383.0 µs
Disk randrw · repetition 3	passed	read p95 latency	1,384 µs
Disk randrw · repetition 3	passed	read p99 latency	2,056 µs
Disk randrw · repetition 3	passed	write bandwidth	84.9 MB/s
Disk randrw · repetition 3	passed	write operations	20,725 IOPS
Disk randrw · repetition 3	passed	write p50 latency	288.8 µs
Disk randrw · repetition 3	passed	write p95 latency	501.8 µs
Disk randrw · repetition 3	passed	write p99 latency	1,974 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	3.63 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	0.41 ms

PostgreSQL performance

Workload / repetition	Outcome	Metric	Value
PostgreSQL memory dataset · repetition 1	passed	Transactions	3,335 tx/s
PostgreSQL memory dataset · repetition 1	passed	Average latency	1.20 ms
PostgreSQL memory dataset · repetition 2	passed	Transactions	3,295 tx/s
PostgreSQL memory dataset · repetition 2	passed	Average latency	1.21 ms
PostgreSQL memory dataset · repetition 3	passed	Transactions	3,013 tx/s
PostgreSQL memory dataset · repetition 3	passed	Average latency	1.33 ms
PostgreSQL storage dataset · repetition 1	passed	Transactions	2,658 tx/s
PostgreSQL storage dataset · repetition 1	passed	Average latency	1.50 ms
PostgreSQL storage dataset · repetition 2	passed	Transactions	2,505 tx/s
PostgreSQL storage dataset · repetition 2	passed	Average latency	1.59 ms
PostgreSQL storage dataset · repetition 3	passed	Transactions	2,577 tx/s
PostgreSQL storage dataset · repetition 3	passed	Average latency	1.55 ms

Consistency over time

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