Hosting resource usage is not just about disk space. CPU, RAM, disk I/O, entry processes, and inode counts can all affect whether a site runs smoothly.
CPU
CPU is used when PHP executes, pages are built, images are processed, backups run, or background tasks fire. Heavy plugins and uncached pages can increase CPU use.
RAM
RAM is working memory. Applications need enough memory to run requests, process uploads, and complete scheduled tasks. PHP memory limits affect individual PHP processes.
Disk I/O
I/O measures reading and writing to disk. Backups, cache rebuilds, large imports, and busy databases can increase I/O.
Inodes
An inode roughly represents a file or directory. A site with many tiny cache files can hit inode limits even if total disk usage looks modest.
What to Do
Enable caching, remove unused files, clean old backups, optimise images, and review plugins. If legitimate traffic has outgrown the plan, it may be time to upgrade.
Resource graphs are clues. Match spikes to real events such as backups, campaigns, imports, or plugin updates.
