Symptoms
WordPress has connection timeouts.
(WordPress works under apache2 + PHP-FPM 7.4)
Non-Symptoms
CPU load average: 0.00 0.05 0.07
→ we have not a cryptolocker / miner
RAM: 3.54G / 7.69G
→ we have not malware consuming all the RAM
Swap: 482/511M
Apache2 status is flat:
http://178.32.217.125/server-status
→ Apache2 is healthy
ownCloud works perfectly (mod_php)
→ PHP mod_fpm seems healthy
Questions
Is it something specific to the PHP-FPM 7.4?
Is it something specific to WordPress? (using PHP-FPM)