Most VPS sizing questions have the same answer: start with what your workload needs today, upgrade in place when you actually hit a limit.
Start from the workload, not the price list
A static site or small API can run comfortably on 1 to 2 CPU cores and 2 to 4 GB RAM. A database-backed app with real traffic, or a handful of services on one box (web server, database, cache), typically wants 4 GB RAM and up. If you are not sure, undersize slightly rather than oversize, a Corenzy VPS upgrades in place without a rebuild.
RAM is usually the first thing you run out of
CPU exhaustion shows up as slow responses under load. RAM exhaustion shows up as the OOM killer terminating processes, or the server locking up entirely, a much worse failure mode. When in doubt between more cores and more RAM for the same budget, more RAM is the safer choice for most general workloads.
NVMe storage matters more than the GB number
Every Corenzy VPS plan runs on NVMe storage, not spinning disk or even SATA SSD. For anything with a database, random small reads and writes, exactly what NVMe is built for, this matters far more day to day than the raw disk-space number on the plan.
Upgrading later
Upgrades apply to the existing server, no reinstall, no data migration, no new IP. Downgrades are more limited since they can require freeing up disk space first. That asymmetry is exactly why starting smaller and upgrading when you actually need to is lower-risk than guessing high on day one.
Buy for the traffic you have this month. A VPS upgrade takes minutes, months of overpaid idle capacity does not refund itself.
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