Прочети на българскиAfter the disk benchmarks we also ran a separate CPU / RAM test with sysbench to see more clearly the difference between a lighter and a stronger VPS profile. The test was run in two temporary LXC clones made from the plan templates, not directly on the Proxmox host.
Test environment
- Start-like: 2 vCPU, 4 GB RAM
- Power-like: 4 vCPU, 8 GB RAM
- sysbench was used for the CPU and memory tests
- this is not a synthetic test of the host, but a measurement inside the temporary instances themselves
First results
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Metric Start-like Power-like
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CPU single-thread 474.09 eps 472.63 eps
CPU all cores 925.28 eps 1841.70 eps
Memory read 46927.98 MiB/s 46962.82 MiB/s
Memory write 28681.49 MiB/s 11653.67 MiB/sSecond memory pass
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Metric Start-like Power-like
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4K read, all cores 22135.75 MiB/s 35270.54 MiB/s
4K write, all cores 1836.54 MiB/s 1933.31 MiB/s
1M read, 1 thread 25636.51 MiB/s 25607.77 MiB/s
1M write, 1 thread 21209.21 MiB/s 19720.22 MiB/sWhat we see here
- single-thread CPU is almost the same, which is normal on the same host processor
- with multi-core CPU Power-like is almost 2x above Start-like, which matches 4 versus 2 vCPU
- for memory read Power-like shows a real lead in the multi-core 4K profile
- for memory write there is no strong, clear signal of a big difference between the two profiles
- the first, lower write result for Power-like should not be read on its own as a marketing conclusion
Practical conclusion
- if your workload is more sensitive to a single core, the difference will not be dramatic
- if the workload uses more threads, the Power-like profile has a clear lead
- a disk benchmark alone is not enough to judge a VPS plan, which is why the CPU and RAM tests are the important second half
For the storage comparison see also the topics Comparing the storage pools in Proxmox and Comparison table: Start vs Power vs Plus vs Micron.