How much RAM/CPU โ common question.
By traffic
500-2K โ 1GB. 2K-10K โ 2GB. 10K-50K โ 4GB. 50K+ โ 8GB.
By CMS
Static โ 512MB. WordPress โ 1-2GB. WooCommerce โ 2-4GB.
Database
MySQL โ 2-8GB cache. Big sites โ separate server.
SSD vs NVMe
500MB/s vs 3GB/s.