• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Question About Ubuntu 20 Plesk Poor Performance

sacavusoglu

Basic Pleskian
Server operating system version
Ubuntu 20.04.01 LTS
Plesk version and microupdate number
18.0.48
Hello

A server that I serve to my customers is running with 8 Core 16GB Ram 150 GB SSD + Ubuntu 20 LTS + Plesk 18.0.48 versions. It contains 20 domains. (The system memory does not exceed 6GB.) There are also security add-ons such as Email Security Antivirus, which is one of the Plesk add-ons.

My problem is actually as follows, although I have given 1GB of php memory to the domains, I get an "Error 500" error when one or more domains are in high demand. Although my other server, Centos 7, has lower system hardware (6 Cores 6 GB Ram), similar situations do not occur.

My guess is that Email Security is tiring the system, but I would like to hear your thoughts from our fellow users.

Thanks
 
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