Since the last Woo Update the shop is very slow and has time outs

I can see that each second in access log /wp-admin/admin-ajax.php?action=as_async_request_queue_runner&nonce= is called

Someone from Woo support will be able to provide more guidance on this. However I found this similar post which may help in the meantime https://www.ads-software.com/support/topic/as_async_request_queue_runner-maxing-out-cpu/

Ok i found out that heartbeat was producing the problem, because a plugin used google analytics scroll tracking and produced extreme much requests to database

Hi Felix,

I’m glad to hear that you have identified the plugin that was causing the problem with your shop’s performance. It seems that the plugin was using the WordPress Heartbeat API to send frequent requests to the server, which resulted in high CPU usage and slow loading times.

The best way to resolve this issue is to disable the plugin and contact the plugin developer for further assistance. They will be able to provide you with more information and possible solutions for their plugin. You can also check the plugin’s documentation and support forum to see if there are any updates or fixes available.

Alternatively, you can try to reduce the frequency of the Heartbeat API requests by using a plugin such as Heartbeat Control. This plugin can help you manage the Heartbeat API settings and optimize your site’s performance.

I hope this helps you resolve the issue. Let us know if there’s anything else we can help you with.

Thank you for choosing WooCommerce and have a great day! ??