Hi @greghy, I am happy to answer your question!
The default lifetime of the Page Cache is 3600 seconds and the controls to change that expiration time are actually located in the HTML & XML section located under Performance > Browser Cache. Changing the ‘Expires header lifetime’ will alter the duration of time before your pages are flagged as stale and get regenerated in the cache.
I hope that answers you question and please let us know if there is anything else we can do to help!
Is this value taken into account even if “Set expires header” (in HTML & XML section) is not checked?
Hello @greghy,
In Performance>Page Cache, when you scroll down to the bottom of the page, you ca see under the notes the following:
The TTL of page cache files is set via the “Expires header lifetime” field in the “HTML” section on Browser Cache Settings tab.
If TTL of page cache files is not set, the cache will expire when you empty the cache manually.
