Title: Should I define WP_REDIS_DATABASE?
Last modified: August 30, 2016

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# Should I define WP_REDIS_DATABASE?

 *  Resolved [LZL0](https://wordpress.org/support/users/lchief/)
 * (@lchief)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/should-i-define-wp_redis_database/)
 * Hello,
 * I am running multiple databases on my MariaDB server. Redis is running with HHVM
   3.8. Should I define WP_REDIS_DATABASE? If yes, then how could I get the ID of
   my current WordPress database using the terminal?
 * [https://wordpress.org/plugins/redis-cache/](https://wordpress.org/plugins/redis-cache/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/should-i-define-wp_redis_database/#post-6328841)
 * Multiple MariaDB databases won’t be a problem, unless you are running multiple
   WordPress installations on the same server. In that case use the `WP_REDIS_DATABASE`
   constant. You need to set integers like `0`, `1`, `3`. Redis doesn’t support 
   database names.
 * Or alternatively you could only use 1 Redis database (default is `0`), but set
   the `WP_CACHE_KEY_SALT` for each WordPress installation.
 *  Thread Starter [LZL0](https://wordpress.org/support/users/lchief/)
 * (@lchief)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/should-i-define-wp_redis_database/#post-6328921)
 * Thank you for your detailed answer!

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 2 participants
 * Last reply from: [LZL0](https://wordpress.org/support/users/lchief/)
 * Last activity: [10 years, 12 months ago](https://wordpress.org/support/topic/should-i-define-wp_redis_database/#post-6328921)
 * Status: resolved