Title: Multisite Caching Issue
Last modified: October 29, 2020

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# Multisite Caching Issue

 *  [wlpdrpat](https://wordpress.org/support/users/wlpdrpat/)
 * (@wlpdrpat)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/multisite-caching-issue/)
 * [@donncha](https://wordpress.org/support/users/donncha/)
 * I recently decided to upgrade my server and to try to get to the new standard
   for WP on PHP and MySQL. Yes, I should have done this a long time ago but everything
   was working perfectly until now.
 * Following upgrading my server and PHP to 5.6.xx and MySQL to 5.7 I then upgraded
   WordPress and plugins.
 * I found a strange new behavior on Super Cache – it is rebuilding the home page
   cache following every page load. So, it sends the old super cache file and then
   rebuilds a new one. This is very strange because I currently have it configured
   to not time out cache and to not rebuild cache. I did that so I could have a 
   chance to debug the various coding issues caused by the upgrades without totally
   disrupting my sites.
 * Any reason you can think of that would cause this behavior??
 * Thanks,
    Pat

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

 *  Thread Starter [wlpdrpat](https://wordpress.org/support/users/wlpdrpat/)
 * (@wlpdrpat)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/multisite-caching-issue/#post-13601438)
 * [@donncha](https://wordpress.org/support/users/donncha/) Would this option cause
   the behavior I described:
 * Cache rebuild. Serve a supercache file to anonymous users while a new file is
   being generated. (Recommended)
 * I have selected the above option because it is recommended but I didn’t think
   this would cause the supercached files to be rebuilt every time someone accesses
   the page. Is that what it is supposed to do?? If so, why?? I thought the whole
   point of cached pages was to reduce load on the server. This option, if it does
   what I described, would appear counterproductive to server resources, ie creating
   a new cached page every time the page is accessed.
 * Please let me know if that is the case.
 * Thanks,
    Pat
 *  Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/)
 * (@donncha)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/multisite-caching-issue/#post-13604848)
 * [@wlpdrpat](https://wordpress.org/support/users/wlpdrpat/) – Did the debug log
   say why the front page cache file was being deleted/put in rebuild mode? Maybe
   some new plugin you have is triggering an action that’s causing this.
    Or the
   front page cache file isn’t being saved at all. Might be worth opening a command
   line in that directory and seeing the files generated there while you hit the
   front page.
 *  Thread Starter [wlpdrpat](https://wordpress.org/support/users/wlpdrpat/)
 * (@wlpdrpat)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/multisite-caching-issue/#post-13605913)
 * [@donncha](https://wordpress.org/support/users/donncha/) I’m using advanced caching
   with mobile device support. So, it creates 2 HTML files (desktop and mobile).
   The issue is occurring on a multisite network but is only affecting one particular
   site. I checked a few of the other sites and it’s not happening on those.
 * So, I would assume you are correct that it is related to some plugin conflict
   or at least that is the direction I am working.
 * Part of the reason I hate upgrading multisite installations is that the individual
   sites all have unique issues to address. Se la vie.

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

The topic ‘Multisite Caching Issue’ is closed to new replies.

 * ![](https://ps.w.org/wp-super-cache/assets/icon-256x256.png?rev=3506220)
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 * 3 replies
 * 2 participants
 * Last reply from: [wlpdrpat](https://wordpress.org/support/users/wlpdrpat/)
 * Last activity: [5 years, 7 months ago](https://wordpress.org/support/topic/multisite-caching-issue/#post-13605913)
 * Status: not resolved