Keeping sites healthy
Performance, database and cache
Where a site's speed is going, and the housekeeping that reclaims some of it.
Three tabs share one job: keeping a site quick.
Performance
Response times over time, page weight, and what a page loads before it can render. Useful for answering has this site got slower — a single measurement rarely means much, a trend does.
Database
Table sizes, growth over time, and the bloat that accumulates in every WordPress install: post revisions, auto-drafts, trashed content, expired transients, orphaned metadata, and rows left behind by plugins that were removed years ago.
The cleanup tools remove those categories individually, so you can take the safe ones and leave the rest. Take a backup before a cleanup. These operations delete rows, and while they are conservative, undo means restore.
Optimising tables reclaims the space freed by deletions. It is safe and slow, and worth doing after a large cleanup rather than on a schedule.
Cache
Clears page caches, object cache, transients and OPcache in one action, with support for the common caching plugins. Use it after a change that should be visible immediately and is not.
Clearing a cache is never destructive. Everything it removes is rebuilt on demand — the only cost is that the next visitor pays for the rebuild.
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