Hello,
I have Ubuntu Server 12.04.3 LTS and Plesk 11.5.30 Update #18.
This is a Virtual Server with 2 vCPU (4,80 Ghz total), ram 4 Gb.
The server has 13 domains.
Average server utilization is this: CPU 10%, RAM 50%, active processes 110-115
Occasionally the sites are inaccessible and you...