• 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.

plesk 9, knowledge base

When domain count reaches ~300 then many of services can stop working. e.g. apache. The reason for that is a huge amount of open file descriptors in apache. So Plesk starts to use pipeloging for apache logs. The idea is that all log records are piped to one binary program, which will open corresponding domain log file. Unfortunaly, such mechanism can be applied for access_log only, not for error_log.
I think that pipelog enabling will help you. Or just separate domains to different servers.
 
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