mfcanovas

The duration implies that web server processes will remain busy while cache is clearing, collapsing the web server whether it’s consuming cpu or not. In an e-commerce with more than 40,000 products, this mean approximately 9 minutes with users not being able to access

I’m not sure that the problem in this case is the creating cache process.

As you can see in the screenshots, the method which is consuming most of the time and resources is rm_folder_recursively.

Please, take a look at these screenshots from New Relic.

Performance issue when clearing cache

Same problem here.

I found the problem is on the form container class name.

On public/assets/js/public.js:297 it’s looking for a container with class name wpmchimpselector.

On widget/views/widget9.php:546 the class name is wpmcintselector instead of wpmchimpselector (it may be a typo)

As a workaround, you can rename class wpmcintselector to wpmchimpselector on widget9.php:546 while waiting for an official fix.