Title: Multisite – mu-plugins
Last modified: October 31, 2018

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# Multisite – mu-plugins

 *  Resolved [apolakos](https://wordpress.org/support/users/apolakos/)
 * (@apolakos)
 * [7 years, 7 months ago](https://wordpress.org/support/topic/multisite-mu-plugins/)
 * Just super quick question.
 * We run an enterprise multisite setup with over 1,000 websites. I literally need
   this plugin for one page on one of those sites. I know that adding a file to 
   the mu-plugins folder will cause it to run on all sites. However, If I only activate
   the main plugin on one site and only use the filter for one page, will there 
   be any performance / other issues by having the mu-plugin file?
 * Thanks much.
    -  This topic was modified 7 years, 7 months ago by [apolakos](https://wordpress.org/support/users/apolakos/).

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

 *  Plugin Author [Jeff Sterup](https://wordpress.org/support/users/foomagoo/)
 * (@foomagoo)
 * [7 years, 7 months ago](https://wordpress.org/support/topic/multisite-mu-plugins/#post-10834257)
 * If you only have it active on the one site then it will only affect that one 
   site. It checks the option set by the plugin to see if it is active. And it will
   only add the database table to the site you activate it on. So there shouldn’t
   be any performance issues if it is only activated on one site.
 *  Thread Starter [apolakos](https://wordpress.org/support/users/apolakos/)
 * (@apolakos)
 * [7 years, 7 months ago](https://wordpress.org/support/topic/multisite-mu-plugins/#post-10834874)
 * Thanks much Jeff.

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

The topic ‘Multisite – mu-plugins’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [apolakos](https://wordpress.org/support/users/apolakos/)
 * Last activity: [7 years, 7 months ago](https://wordpress.org/support/topic/multisite-mu-plugins/#post-10834874)
 * Status: resolved