Title: php notice: wp_cache_flush_runtime used erroneously
Last modified: November 9, 2022

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# php notice: wp_cache_flush_runtime used erroneously

 *  Resolved [Ben Andersen](https://wordpress.org/support/users/ben72/)
 * (@ben72)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/php-notice-wp_cache_flush_runtime-used/)
 * I started seeing this in the logs a week ago:
 * `PHP Notice: The wp_cache_flush_runtime function was <strong>erroneously</strong
   > called. Your object cache implementation does not support flush cache in working
   memory. For more information, see <a href="https://wordpress.org/support/article/
   debugging-in-wordpress/">Debugging in WordPress</a>. (This message was added 
   in version 6.1.0.) in /home/xyz/public_html/xyz-site/wp-includes/functions.php
   on line 5835` (note: this was translated from Swedish)
 * The only plugin using wp_cache_flush_runtime is mailchimp-for-woocommerce.
    -  This topic was modified 3 years, 7 months ago by [Ben Andersen](https://wordpress.org/support/users/ben72/).
      Reason: note about google translation

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

 *  Plugin Support [khungate](https://wordpress.org/support/users/khungate/)
 * (@khungate)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-wp_cache_flush_runtime-used/#post-16255378)
 * [@ben72](https://wordpress.org/support/users/ben72/) thanks for your patience
   while we researched. This error is appears to actually be coming from the Action
   Scheduler on cache delete. From what we can tell, this is a new notice in WP 
   v6.1 and you may be able to contact your host support desk to review how object
   caching is working; they may be able to flush the cache and make the log go away.
 * Let us know if you need anything else.
 *  Thread Starter [Ben Andersen](https://wordpress.org/support/users/ben72/)
 * (@ben72)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-wp_cache_flush_runtime-used/#post-16256411)
 * [@khungate](https://wordpress.org/support/users/khungate/) Thanks for your response.
   
   I flushed the litespeed cache in Cpanel in LiteSpeed Web Cache Manager. But I’m
   still seeing it in the logs. I’m waiting for a response from my webhost. For 
   caching I’m using LiteSpeed cache on a litespeed server and Redis Object cache.

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

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 * ![](https://ps.w.org/mailchimp-for-woocommerce/assets/icon-256x256.png?rev=1509501)
 * [Mailchimp for WooCommerce](https://wordpress.org/plugins/mailchimp-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mailchimp-for-woocommerce/#faq)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [Ben Andersen](https://wordpress.org/support/users/ben72/)
 * Last activity: [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-wp_cache_flush_runtime-used/#post-16256411)
 * Status: resolved