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If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread:
CentOS2Alma discussion
can't apply process slot
- Thread starter Madness
- Start date
This looks like a known problem. Have you checked KB - http://kb.odin.com/en/124614 ?
Hi,
I have the same problem since I have upgraded Plesk to 12.5, but only for one domain.
Sometimes it's loading very slowly (but not for everybody), and sometimes fails with 503 error service temporarly unavailable.
As described, I increased the FcgidMaxProcesses value to 500 and restarted Apache.
Also, I installed Nginx and PHP-FPM components :
But the problem is still there.
I have the same problem since I have upgraded Plesk to 12.5, but only for one domain.
Sometimes it's loading very slowly (but not for everybody), and sometimes fails with 503 error service temporarly unavailable.
As described, I increased the FcgidMaxProcesses value to 500 and restarted Apache.
Also, I installed Nginx and PHP-FPM components :
But the problem is still there.
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