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Question Website Timeouts (WP when Traffic is high)

futureweb

Regular Pleskian
Server operating system version
AlmaLinux release 8.6 (Sky Tiger)
Plesk version and microupdate number
Plesk Obsidian Version 18.0.47 Update #5
Hello,

we have the problem with a Wordpress site that we host that it always becomes very slow / get Timeouts when the customer sends out a newsletter and the traffic to the site increases. Normally the page is very fast, at times after the newsletter the browser remains 30 seconds white and then gets a timeout.

It seems that some service is reaching its limit here, but I can't find out which one.
There are no CPU spikes, there is enough RAM, IO is not greatly increased...
Unfortunately, I can't find any messages in the log files regarding:
- MaxRequestWorkers
- server reached max_children setting
- ...

Plesk itself / other Pages on the Server are accessible with normal speed.

I'm slowly running out of ideas what else to check. Which service could reach its limit here?!?

I hope you have one or two good ideas here! :)
Thanks
 
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