Title: Specify a cache validator
Last modified: August 21, 2016

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# Specify a cache validator

 *  [greencode](https://wordpress.org/support/users/greencode/)
 * (@greencode)
 * [12 years, 4 months ago](https://wordpress.org/support/topic/specify-a-cache-validator/)
 * Firstly, using a combination of GTMetrix and W3 Total Cache I’ve got things set
   up to run really well (with the exception of minifying CSS seems to break some
   of the layout, but that’s for a different post).
 * I just have one issue where I get a D for “Specify a cache validator” in Pagespeed,
   even though I have the “Set entity tag (eTag)” setting checked in W3.
 * The error is “The following resources are missing a cache validator. Resources
   that do not specify a cache validator cannot be refreshed efficiently. Specify
   a Last-Modified or ETag header to enable cache validation for the following resources”
 * Any ideas how I can get this to a an A rating?
 * Thanks in advance for any help.
 * [http://wordpress.org/plugins/w3-total-cache/](http://wordpress.org/plugins/w3-total-cache/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Pothi Kalimuthu](https://wordpress.org/support/users/pothi/)
 * (@pothi)
 * [12 years, 4 months ago](https://wordpress.org/support/topic/specify-a-cache-validator/#post-4513790)
 * > I just have one issue where I get a D for “Specify a cache validator” in Pagespeed,
   > even though I have the “Set entity tag (eTag)” setting checked in W3.
 * Are you sure that your server supports eTag?
 *  [detters](https://wordpress.org/support/users/detters/)
 * (@detters)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/specify-a-cache-validator/#post-4513982)
 * I have this problem as well. GT metric give me a Page Speed poor grade on account
   of cache validators. I’ve configured W3 Total Cache pretty extensively now, but
   can’t seem to make this part of my config happy, as well as YSlow which is also
   complaining about Add Expires headers.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Specify a cache validator’ 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/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/w3-total-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/w3-total-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/w3-total-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/w3-total-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/w3-total-cache/reviews/)

## Tags

 * [cache](https://wordpress.org/support/topic-tag/cache/)
 * [etag](https://wordpress.org/support/topic-tag/etag/)

 * 2 replies
 * 3 participants
 * Last reply from: [detters](https://wordpress.org/support/users/detters/)
 * Last activity: [12 years, 1 month ago](https://wordpress.org/support/topic/specify-a-cache-validator/#post-4513982)
 * Status: not resolved