How to increase the speed of adding to the shared cache?

I’ve been getting the error:

Your cache directory (/) did not exist and couldn’t be created by the web server. Check / permissions.

When I try to activate wp-super-cache. Any help much appreciated.

Hello,

I want to remove the wp-cache plugin.
When i try to do it from the admin panel, i get this message:

Warning: include(../../../wp-load.php) [function.include]: failed to open stream: No such file or directory in /home/www/mysite.com/wp-content/plugins/wp-super-cache/uninstall.php on line 8

Warning: include() [function.include]: Failed opening '../../../wp-load.php' for inclusion (include_path='.:/usr/share/php') in /home/www/mysite.com/wp-content/plugins/wp-super-cache/uninstall.php on line 8

UNINSTALL_WPSUPERCACHE must be set to a non-blank value in uninstall.php

How can i do?

Thanks,

https://www.ads-software.com/extend/plugins/wp-cache/

what is:

define(‘WP_CACHE’, true); //Added by WP-Cache Manager

added to top of my template and the admin pages, please let me know how i can remove it. it messed up my site:

https://marloo.net

thanks.

https://www.ads-software.com/extend/plugins/wp-cache/