Hi, probably help for few users, before I have:
https://kepkuldes.com/images/7e9f03750036d1f3fbace84e0051b960.png
(server Xeon E5-2630 v4 - 4 core VPS, 8GB ram, SSD)
I can´t find what make the problem, in HTOP see all normal, but the every site mysite.com is not 1x opening but many times 6x-7x is there...
All 10 pages uses Swift Performance 2.3.4 and 2.3.5. Then accidentally find this on Swift Cache plugin page:
"High CPU Usage
While Swift is generating the cache, the CPU usage can be higher than usual. Swift is using more aggressive optimization than any other plugin on the market and it needs some CPU. Usually it isn’t an issue and CPU usage can be increased temporarily, but if it goes back to normal after prebuild finished, you don’t need to worry about it.
However, for large sites on relatively small server it can cause too high CPU usage temporarily."
So after that change the settings to low like is there:
https://wordpress.org/plugins/swift-performance-lite/
After set this settings:
https://kepkuldes.com/images/917dc5b64db68403135a0ded922cfbb9.png