Title: _old
Last modified: April 23, 2022

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# _old

 *  Resolved [futureyoon](https://wordpress.org/support/users/futureyoon/)
 * (@futureyoon)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/_old/)
 * hi
 * under ‘page_enhanced’ > mydomain.com > folder
 * I saw 2 files _index_ssl.html and _index_ssl.html_gzip
    and not long after, somehow‘
   _old’ has been added to the these file names. It seems that the file with ‘_old’
   cache is invalidated (expired) after 10 to 20min for some reasons.
 * Is there a way to control to keep these cache’s lifespan forever unless deleted?
   at least where can I control this lifespan?
 * Thank you

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * (@vmarko)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/_old/#post-15588002)
 * Hello [@futureyoon](https://wordpress.org/support/users/futureyoon/)
 * Thank you for reaching out and I am happy to assist you with this.
    Disk: Enhanced
   caching method is persistent and it means that the page will remain cached and
   will not expire unless the cache is purged. _old files are created when the cache
   is purged. It’s fine to have _old files. if you always have only _old files –
   that’s a sign something purges cache all the time. like theme or some plugin.
   Depending on your Purge Policy settings in Performance>Page Cache, the cache 
   is automatically purged once the content is changed or new content is published.
   If nothing was changed and you have not purged the cache manually, as I stated
   before, this may mean that something else is calling the cache invalidation like
   some theme or other plugin. If you have both normal and _old files, this means
   that the cache is purged, and the new file is generated. The _old file will remain
   there until the “Garbage collection interval” kicks in and the default time is
   3600s
 * I hope this helps!
 * Thanks!
 *  Thread Starter [futureyoon](https://wordpress.org/support/users/futureyoon/)
 * (@futureyoon)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/_old/#post-15596789)
 * OK. Thank you! That’s well explained and now I got a better view.
 *  Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * (@vmarko)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/_old/#post-15596853)
 * Hello [@futureyoon](https://wordpress.org/support/users/futureyoon/)
 * You are most welcome!
 * We would really appreciate it if you could take a minute and post a review [here](https://wordpress.org/support/plugin/w3-total-cache/reviews/).
   This will help us to continue offering a top-notch product to users.
    Thanks!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘_old’ is closed to new replies.

 * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806)
 * [W3 Total Cache](https://wordpress.org/plugins/w3-total-cache/)
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 * 3 replies
 * 2 participants
 * Last reply from: [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * Last activity: [4 years, 1 month ago](https://wordpress.org/support/topic/_old/#post-15596853)
 * Status: resolved