Title: Super Cache
Last modified: August 19, 2016

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# Super Cache

 *  Resolved [Jonathan Stegall](https://wordpress.org/support/users/jonathanstegall/)
 * (@jonathanstegall)
 * [15 years, 7 months ago](https://wordpress.org/support/topic/super-cache-2/)
 * Hello,
 * We run several WP sites that use SuperCache, and have upgraded many of them to
   0.9.9. One of them seems to have stopped working entirely. Pages are not stored
   in the cache folder (the cache folder contains nothing but .htaccess and an empty
   meta folder), and the footer has the following error message:
    `<!-- Page not
   cached by WP Super Cache. Could not get mutex lock. -->`
 * I’ve tried $use_flock = true, I’ve tried changing the value of $sem_id, and I’ve
   tried including umask( 0022 ); in wp-config.php. I also have tried regenerating
   the .htaccess rules, just in case. So far, none of these have helped, and the
   tester continues to say that the timestamps don’t match.
 * I haven’t been able to find any other things to try, and would love to hear if
   there are other things I could try.
 * Thanks,
    Jonathan

Viewing 1 replies (of 1 total)

 *  Thread Starter [Jonathan Stegall](https://wordpress.org/support/users/jonathanstegall/)
 * (@jonathanstegall)
 * [15 years, 7 months ago](https://wordpress.org/support/topic/super-cache-2/#post-1690546)
 * Well, apparently removing the cache folder and reinstalling the plugin from scratch
   fixed this. There may have been a file missing from the initial upgrade.
 * Hope that helps, if anyone else experiences this.

Viewing 1 replies (of 1 total)

The topic ‘Super Cache’ is closed to new replies.

## Tags

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

 * 1 reply
 * 1 participant
 * Last reply from: [Jonathan Stegall](https://wordpress.org/support/users/jonathanstegall/)
 * Last activity: [15 years, 7 months ago](https://wordpress.org/support/topic/super-cache-2/#post-1690546)
 * Status: resolved

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