Title: [Plugin – W3 Total Cache] – Plugin Doesn’t Cache
Last modified: August 19, 2016

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# [Plugin – W3 Total Cache] – Plugin Doesn’t Cache

 *  [d4jaj1](https://wordpress.org/support/users/d4jaj1/)
 * (@d4jaj1)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/)
 * Installed the plugin and really didn’t see any difference in performance. Turned
   on debug and found the following:
 * <!– W3 Total Cache: Page cache debug info:
    Engine: disk (enhanced) Key: [http://www.domain.com/contact/index.html.gzip](http://www.domain.com/contact/index.html.gzip)**
   Caching: enabled Status: not cached Creation Time: 1.059s Header info: X-Powered-
   By: W3 Total Cache/0.8.5.1 X-Pingback: [http://www.domain.com/xmlrpc.php](http://www.domain.com/xmlrpc.php)
   Content-Type: text/html; charset=UTF-8 Pragma: public Expires: Fri, 29 Jan 2010
   20:46:18 GMT Last-Modified: Fri, 29 Jan 2010 19:46:18 GMT Cache-Control: max-
   age=3600, public, must-revalidate Vary: Accept-Encoding, Cookie Etag: 9ba6d44db931a913ba058155615f06cd
   Content-Encoding: gzip
 * I’m guess the cache-control line has something to do with it – but I don’t have
   a cache control setting on any of my pages.
 * Thoughts?

Viewing 13 replies - 1 through 13 (of 13 total)

 *  Thread Starter [d4jaj1](https://wordpress.org/support/users/d4jaj1/)
 * (@d4jaj1)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365236)
 * Furthermore – it doesn’t seem like you can deactivate this plugin. I emptied 
   the page cache and deactivated the plugin and all pages get a 404 error. Reactivate
   it and the page appears.
 * What gives?
 *  [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * (@fredericktownes)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365249)
 * Are you logged in while testing? As for the 404s that’s hard to guess without
   a bug submission as that is not a known bug.
 *  Thread Starter [d4jaj1](https://wordpress.org/support/users/d4jaj1/)
 * (@d4jaj1)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365256)
 * I am logged in while testing (firefox); however I’m using another browser to 
   perform the tests (IE8).
 * I will submit a bug report on the uninstall thing.
 *  [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * (@fredericktownes)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365438)
 * Using ctrl + shift + del can you clear your cookies and let me know if the issue
   continues? If that fails can you check `wp-content/w3tc/pgcache/` and see if 
   any files are being written?
 *  Thread Starter [d4jaj1](https://wordpress.org/support/users/d4jaj1/)
 * (@d4jaj1)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365439)
 * Did the cache thing, even used Google Chrome which had never been to the site–
   same issue. As for directory, no files are being written – even when the plugin
   is active. When the plugin is active – all pages will load. When plugin deactivated–
   only homepage will display – rest of site generates 404 error.
 *  [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * (@fredericktownes)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365451)
 * One or more of the following is true:
    - There’s some files missing from the installation. If you cannot activate /
      deactivate without fatal errors files are missing or permissions are in fact
      not ok.
    - There’s “interference” from another plugin (try to disable all except W3TC
      to confirm).
    - You have another caching plugin of any type installed (even if activated)
 *  Thread Starter [d4jaj1](https://wordpress.org/support/users/d4jaj1/)
 * (@d4jaj1)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365520)
 * I sent a bug report so you can check this yourself. If you look at the bug report,
   you will see:
 * 1) Can’t say what is/isn’t missing from installation – but I can activate and
   reactivate the plugin no problem. Active, site works but doesn’t cache – inactive,
   site doesn’t work except homepage.
 * 2) Per the bug report I submitted – ALL plugins are deactivated and defualt WP
   theme active.
 * 3) See #1, no plugin active. In fact, no other cache plugins installed. WP Super
   Cache was installed, but I deleted prior to installing this one. That plugin 
   directory no longer exists.
 * Have you looked at the bug report I submitted? BTW, does this plugin have a log
   file?
 *  [ericbojo](https://wordpress.org/support/users/ericbojo/)
 * (@ericbojo)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365551)
 * For some reason, mine said: Status Cache: not-enabled (not logged in) but when
   I deleted all my cookies/ emptied cache, It was fine.
 * Also I notice that my
 * > wp-content/w3tc/pgcache/
 *  folder is empty. Is this normal? I am using the memcache settings for page/minify.
 * Also, My site gets reallly slow when I use database caching (after I update posts/
   pages etc). Is this because my free memory on my server is only like 30 megs (
   with it DB cacheing disabled)?
 *  [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * (@fredericktownes)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365566)
 * > Also I notice that my `wp-content/w3tc/pgcache/` folder is empty. Is this normal?
   > I am using the memcache settings for page/minify.
 * If you’re not using disk method for page cache (as you said), then yes it’s normal.
 * > My site gets reallly slow when I use database caching (after I update posts/
   > pages etc). Is this because my free memory on my server is only like 30 megs(
   > with it DB cacheing disabled)?
 * Free memory is irrelevant.
 * If you’re using memcached for DB caching and you haven’t installed the PECL Memcache
   PHP extension, then yes this can happen. If you’re using disk, then you have 
   a “slow” disk array / excessive queries / an optimized theme.
 * For best results (if you have a single standalone server), use APC as your DB
   caching method and adjust the SHM size accordingly.
 *  [ericbojo](https://wordpress.org/support/users/ericbojo/)
 * (@ericbojo)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365572)
 * Thanks for the answer. I wasn’t sure If I needed to change the write to **wp-
   content/w3tc/pgcache/ ** to 777, so I guess I can change it back to 755.
 * I am using a VPS. So will I be able to install APC? And what is SHM size, and
   how to adjust it.. what are the proper parameters etc..?
 * How can I verify that PECL Memcache PHP extension is installed? I am running 
   debian (is the command something like memcache -v ?).
 * Can you refer me to any tutorials on how to install APC or memcache?
 *  [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * (@fredericktownes)
 * [16 years, 2 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365575)
 * > I wasn’t sure If I needed to change the write to wp-content/w3tc/pgcache/ to
   > 777, so I guess I can change it back to 755.
 * Right
 * > I am using a VPS. So will I be able to install APC? And what is SHM size, and
   > how to adjust it.. what are the proper parameters etc..
 * Yes. So choose a value, then copy the file apc.php to some location you can open
   in your browser and check it after 6-24h and see if you have some available memory
   left or and very little fragmentation. If there’s a lot, lower the SHM, if there’s
   not do the reverse.
 * > How can I verify that PECL Memcache PHP extension is installed? I am running
   > debian (is the command something like memcache -v ?).
 * For a standalone server you don’t need it. Go to the installation tab or read
   the FAQ tab of the plugin to learn more.
 * > Can you refer me to any tutorials on how to install APC or memcache?
 * Go to the installation tab of the plugin.
 *  [hamamoto](https://wordpress.org/support/users/hamamoto/)
 * (@hamamoto)
 * [15 years, 6 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365753)
 * I’m having the same issue as d4jaj1 when I deactivate the plugin (all pages load
   when activated, only the homepage when deactivated).
 * Was there a resolution to the issue?
 *  [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * (@fredericktownes)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365754)
 * The cause of other issues in this thread are likely not related to your situation.
   Are you using disk enhanced mode? Are you using fancy permalinks? Did you check
   your WordPress .htaccess directives after deactivation?

Viewing 13 replies - 1 through 13 (of 13 total)

The topic ‘[Plugin – W3 Total Cache] – Plugin Doesn’t Cache’ is closed to new replies.

 * 13 replies
 * 4 participants
 * Last reply from: [Frederick Townes](https://wordpress.org/support/users/fredericktownes/)
 * Last activity: [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-w3-total-cache-plugin-doesnt-cache/#post-1365754)
 * Status: not resolved

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