How to Use Object Cache for WordPress
- 1). Open your FTP program and log in to your website.
- 2). Locate the "wp-config.php" file and download the file to your computer.
- 3). Open the "wp-config.php" file. Locate the "ENABLE_CACHE value and set it to "define('ENABLE_CACHE', TRUE);"
- 4). Save and close the "wp-config.php" file.
- 5). Upload the new "wp-config.php" file to your server.
- 6). Go to the "wp-content" directory using your FTP program.
- 7). Create a folder named "cache" within the "wp-content" folder.
- 8). Set the permissions for your new folder to "755" to ensure that it is writable. Permissions are typically changed by right-clicking on the directory name in your FTP program and selecting a "permissions" option.
Source...